Equity [Abstract] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassifications Out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Realized (losses) gains on available-for-sale securities Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] Amortization of losses included in net income on available-for-sale securities transferred to held to maturity Accumulated Amortization Of Gains Included In Net Income On Available For Sale Securities Transferred To Held To Maturity [Member] Represents accumulated amortization of gains included in net income on available for sale securities transferred to held to maturity. Amortization of losses included in net income on derivative financial instruments accounted for as cash flow hedges Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Reclassification of disproportionate tax effect related to terminated cash flow hedges Reclassification Of Disproportionate Tax Effect Related To Terminated Cash Flow Hedges [Member] Amortization of prior service cost and actuarial losses included in net periodic pension cost for defined benefit pension plan Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Prior service cost Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] Actuarial losses Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Securities (losses) gains, net Gain (Loss) on Sale of Securities, Net Investment securities interest revenue Interest Income, Operating Money market deposit interest expense Interest Expense, Money Market Deposits Federal Home Loan Bank advances interest expense Interest Expense, Federal Home Loan Bank and Federal Reserve Bank Advances, Short-term Salaries and employee benefits expense Labor and Related Expense Other expense Other Noninterest Expense Total before tax Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Income tax benefit (expense) Income Tax Expense (Benefit) Net income available to common shareholders Net Income (Loss) Available to Common Stockholders, Basic Investments, Debt and Equity Securities [Abstract] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] U.S. Treasuries US Treasury Securities [Member] U.S. Government agencies US Government Agencies Debt Securities [Member] State and political subdivisions US States and Political Subdivisions Debt Securities [Member] Mortgage-backed securities Collateralized Mortgage Backed Securities [Member] Corporate bonds Corporate Debt Securities [Member] Asset-backed securities Asset-backed Securities [Member] Other Other Debt Obligations [Member] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Investment securities available for sale: Available-for-sale Securities [Abstract] Amortized Cost Available-for-sale Debt Securities, Amortized Cost Basis Gross Unrealized Gains Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Losses Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax Fair Value Available-for-sale Securities, Debt Securities Fair Value Disclosures [Abstract] Schedule of assets and liabilities measured at fair value on a recurring basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of assets measured at fair value on a recurring basis using significant unobservable inputs Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Schedule of quantitative information about Level 3 fair value measurements for fair value on a recurring basis Fair Value Inputs, Assets, Quantitative Information [Table Text Block] Schedule of presentation of united's assets and liabilities measured at fair value on nonrecurring basis Fair Value Measurements, Nonrecurring [Table Text Block] Schedule of carrying amount and fair values for other financial instruments that are not measured at fair value on a recurring basis Fair Value, by Balance Sheet Grouping [Table Text Block] Income Statement [Abstract] Interest revenue: Interest and Dividend Income, Operating [Abstract] Loans, including fees Interest and Fee Income, Loans and Leases Investment securities, including tax exempt of $1,025 and $357, and $1,997 and $636 Interest and Dividend Income, Securities, Operating Deposits in banks and short-term investments Federal Funds Sold Commercial Paper and Deposits In Banks Federal funds sold, commercial paper and deposits in banks. Total interest revenue Interest and Dividend Income, Operating Interest expense: Interest Expense [Abstract] Deposits: Deposits [Abstract] NOW Interest Expense, Negotiable Order of Withdrawal (NOW) Deposits Money market Savings Interest Expense, Savings Deposits Time Interest Expense, Time Deposits Total deposit interest expense Interest Expense, Deposits Short-term borrowings Interest Expense, Short-term Borrowings Federal Home Loan Bank advances Long-term debt Interest Expense, Long-term Debt Total interest expense Interest Expense Net interest revenue Interest Income (Expense), Net Provision for credit losses Provision for Loan and Lease Losses Net interest revenue after provision for credit losses Interest Income (Expense), after Provision for Loan Loss Noninterest income: Noninterest Income [Abstract] Service charges and fees Fees and Commissions, Depositor Accounts Mortgage loan and other related fees Fees and Commissions, Mortgage Banking Brokerage fees Brokerage Commissions Revenue Gains from sales of SBA/USDA loans Gain (Loss) on Sale of Loans and Leases Other Noninterest Income, Other Total noninterest income Noninterest Income Total revenue Revenues Noninterest expenses: Operating Expenses [Abstract] Salaries and employee benefits Communications and equipment Communications and Equipment Communications and equipment. Occupancy Occupancy, Net Advertising and public relations Marketing and Advertising Expense Postage, printing and supplies Supplies and Postage Expense Professional fees Professional Fees FDIC assessments and other regulatory charges Fdic Assessments and Other Regulatory Charges FDIC assessments and other regulatory charges. Amortization of intangibles Amortization of Intangible Assets Merger-related and other charges Business Combination, Acquisition Related Costs Other Total noninterest expenses Noninterest Expense Net income before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income tax expense Net income Net Income (Loss) Attributable to Parent Net income available to common shareholders Earnings per common share: Earnings Per Share [Abstract] Basic (in dollars per share) Earnings Per Share, Basic Diluted (in dollars per share) Earnings Per Share, Diluted Weighted average common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] NLFC Holdings Corporation Nlfc Holdings Corporation [Member] Represents information about NLFC Holdings Corporation. Business Acquisition [Line Items] Business Acquisition [Line Items] Accounted for pursuant to ASC 310-30: Certain Loans Acquired in Transfer Accounted for as Held-to-maturity Debt Securities, Acquired During Period [Abstract] Contractually required principal and interest Certain Loans Acquired in Transfer Accounted for as Held-to-maturity Debt Securities, Acquired During Period, Contractually Required Payments Receivable at Acquisition Non-accretable difference Certain Loans Acquired in Transfer, Nonaccretable Difference Cash flows expected to be collected Certain Loans Acquired in Transfer Accounted for as Held-to-maturity Debt Securities, Acquired During Period, Cash Flows Expected to be Collected at Acquisition Accretable yield Certain Loans Acquired in Transfer, Accretable Yield Fair value Certain Loans Acquired in Transfer Accounted for as Held-to-maturity Debt Securities, Acquired During Period, at Acquisition, at Fair Value Excluded from ASC 310-30: Business Combination, Acquired Receivables [Abstract] Fair value Business Combination, Acquired Receivable, Fair Value Gross contractual amounts receivable Business Combination, Acquired Receivables, Gross Contractual Amount Estimate of contractual cash flows not expected to be collected Business Combination, Acquired Receivables, Estimated Uncollectible Commitments and Contingencies Disclosure [Abstract] Schedule of contractual amount of off-balance sheet instruments Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block] Statement of Stockholders' Equity [Abstract] Exercise of stock options (in shares) Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Common stock issued to dividend reinvestment plan and employee benefits plans (in shares) Stock Issued During Period Shares Dividend Reinvestment Plan and Employee Benefit Plans Stock issued during period shares dividend reinvestment plan and employee benefit plans. Common stock issued for acquisition (in shares) Stock Issued During Period, Shares, Acquisitions Vesting of restricted stock, net of shares surrendered to cover payroll taxes, shares issued (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Vesting of restricted stock, net of shares surrendered to cover payroll taxes, shares deferred (in shares) Vesting Of Restricted Stock Shares Deferred Vesting of restricted stock, shares deferred. Shares issued from deferred compensation plan, net of shares surrendered to cover payroll taxes (in shares) Number Of Shares Issued From Deferred Compensation Plan Number of shares issued from deferred compensation plan. Common stock dividends (in dollars per share) Common Stock, Dividends, Per Share, Declared Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Recurring Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Level 3 Fair Value, Inputs, Level 3 [Member] Liability Class [Axis] Liability Class [Axis] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Derivative Liability Derivative Liability [Member] Represents Derivative Liability. Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Derivative Asset Derivative Asset [Member] Represents Derivative Asset. Servicing rights for SBA/USDA loans SBA Servicing Rights [Member] Represents SBA servicing rights. Residential mortgage servicing rights Residential Mortgage Servicing Rights [Member] Residential Mortgage Servicing Rights [Member] Securities Available-for-Sale Available-for-sale Securities [Member] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Reconciliation of Assets at Level 3 Measurement Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Balance at beginning of period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Business combinations Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset, Business Combination And Provisional Adjustment Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset, Business Combination And Provisional Adjustment Transfer from amortization method to fair value Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net Additions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances Sales and settlements Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales And Settlements Amount of sale and settlement of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Other comprehensive income Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Amounts included in earnings - fair value adjustments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Balance at end of period Reconciliation of Liabilities at Level 3 Measurement Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Balance at beginning of period Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value Business combinations Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Liability, Business Combination And Provisional Adjustment Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Liability, Business Combination And Provisional Adjustment Transfer from amortization method to fair value Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net Additions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances Sales and settlements Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales And Settlements Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales And Settlements Other comprehensive income Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss) Amounts included in earnings - fair value adjustments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Balance at end of period Offsetting [Abstract] Right to reclaim cash collateral Derivative, Collateral, Right to Reclaim Cash Obligation to return cash collateral Derivative, Collateral, Obligation to Return Cash Debt Disclosure [Abstract] Long-term Debt Long-term Debt [Text Block] Receivables [Abstract] Loans and Leases Receivable Disclosure [Table] Loans and Leases Receivable Disclosure [Table] Receivable Type [Axis] Receivable Type [Axis] Receivable [Domain] Receivable [Domain] Loans Receivable Loans Receivable [Member] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Commercial Commercial Portfolio Segment [Member] Residential Residential Portfolio Segment [Member] Consumer direct Consumer Portfolio Segment [Member] Industry Sector [Axis] Industry Sector [Axis] Industry Sector [Domain] Industry Sector [Domain] Commercial & industrial Commercial and Industrial Sector [Member] Class of Financing Receivable, Type [Axis] Class of Financing Receivable, Type [Axis] Class of Financing Receivable, Type [Domain] Class of Financing Receivable, Type [Domain] Owner occupied commercial real estate Owner Occupied Commercial Real Estate [Member] Represents information of owner occupied commercial real estate. Income producing commercial real estate Income Producing Commercial Real Estate [Member] Property that represents income producing commercial real estate. Residential mortgage Residential Mortgage [Member] Home equity lines of credit Home Equity Line of Credit [Member] Construction Construction Loans [Member] Indirect auto Automobile Loan [Member] Equipment Financing [Member] Equipment Financing [Member] Represents information related to equipment financing. Accounts, Notes, Loans and Financing Receivable [Line Items] Loans and Leases Receivable Disclosure [Line Items] Classifications of loans Loans and Leases Receivable, Net Amount [Abstract] Total loans Loans and Leases Receivable, Net of Deferred Income Less allowance for loan and lease losses Loans and Leases Receivable, Allowance Loans and leases, net Loans and Leases Receivable, Net Amount Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Senior debentures Senior Notes [Member] Subordinated debentures Subordinated Debt [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] 2022 senior debentures Two Thousand Twenty Two Senior Debentures [Member] Represents information of 2022 senior debentures. 2027 senior debentures Two Thousand Twenty Seven Senior Debentures [Member] Represents information of 2027 senior debentures. 2025 subordinated debentures Two Thousand Twenty Five Subordinated Debentures [Member] Represents information of 2025 subordinated debentures. 2028 subordinated debentures Two Thousand Twenty Eight Subordinated Debentures [Member] Represents information of 2028 subordinated debentures. Debt Instrument [Line Items] Debt Instrument [Line Items] Percentage of principal amount redeemed Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed Maturity date Debt Instrument, Maturity Date Aggregate principal amount Debt Instrument, Face Amount Schedule of Assets Sold under Agreements to Repurchase [Table] Schedule of Assets Sold under Agreements to Repurchase [Table] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Overnight and Continuous Maturity Overnight [Member] Up to 30 Days Maturity Less than 30 Days [Member] 30 to 90 Days Maturity 30 to 90 Days [Member] 91 to 110 days Maturity Greater than 90 Days [Member] Assets Sold under Agreements to Repurchase [Line Items] Assets Sold under Agreements to Repurchase [Line Items] Remaining Contractual Maturity of the Agreements Securities Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement Gross amount of recognized liabilities for repurchase agreements in offsetting disclosure Securities Loaned, Gross Including Not Subject to Master Netting Arrangement Amounts related to agreements not included in offsetting disclosure Securities Loaned and Securities Sold under Agreement to Repurchase, Gross Including Not Subject to Master Netting Arrangement Goodwill and Intangible Assets Disclosure [Abstract] Goodwill [Roll Forward] Goodwill [Roll Forward] Goodwill, gross, beginning of period Goodwill, Gross Accumulated Impairment Losses, beginning of period Goodwill, Impaired, Accumulated Impairment Loss Goodwill, net of Accumulated Impairment Losses, beginning of period Goodwill Acquisition of NLFC Goodwill, Acquired During Period Measurement period adjustments - FOFN and HCSB Goodwill, Purchase Accounting Adjustments Measurement period adjustments Goodwill, Other Increase (Decrease) Goodwill, gross, end of period Accumulated Impairment Losses, end of period Goodwill, net of Accumulated Impairment Losses, end of period Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Stock Options Employee Stock Option [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Outstanding at December 31, 2017 (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Cancelled/Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Outstanding at June 30, 2018 (in shares) Exercisable at June 30, 2018 (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Weighted-Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Outstanding at December 31, 2017 (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Cancelled/Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Outstanding at June 30, 2018 (in dollars per share) Exercisable at June 30, 2018 (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Weighted-Average Remaining Contractual Term (Years), Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Weighted-Average Remaining Contractual Term (Years), Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Aggregate Intrinsic Value, Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Aggregate Intrinsic Value, Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Schedule of Held-to-maturity Securities [Table] Schedule of Held-to-maturity Securities [Table] Debt Security [Axis] Debt Security [Axis] Major Types of Debt Securities [Domain] Major Types of Debt Securities [Domain] Schedule of Held-to-maturity Securities [Line Items] Schedule of Held-to-maturity Securities [Line Items] Summary of held to maturity securities in an unrealized loss position Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract] Fair Value, Less than 12 Months Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Unrealized Loss, Less than 12 Months Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Fair Value, 12 Months or More Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Unrealized Loss, 12 Months or More Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Fair Value, Total Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value Unrealized Loss, Total Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Equipment financing Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Pass Pass [Member] Watch Watch [Member] Represents watch. Substandard Substandard [Member] Doubtful / Loss Doubtful [Member] Financing Receivable, Recorded Investment [Line Items] Financing Receivable, Recorded Investment [Line Items] Risk category of loans by class of loans Risk Category Of Loans By Class Of Loans [Abstract] Risk category of loans by class of loans. Total loans, excluding PCI loans Loans And Leases Receivable Excluding Purchased Credit Impaired Loans Represents loans and leases receivable excluding purchased credit impaired loans. Loans Outstanding, PCI Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Not designated as hedging instrument, economic hedge Not Designated as Hedging Instrument, Economic Hedge [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Interest expense Interest Expense [Member] Interest revenue Interest Income [Member] Hedging Relationship [Axis] Hedging Relationship [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Cash flow hedging Cash Flow Hedging [Member] Fair value hedging of interest rate risk Fair Value Hedging [Member] Servicing Assets and Servicing Liabilities Risk [Axis] Servicing Assets and Servicing Liabilities Risk [Axis] Risks Inherent in Servicing Assets and Servicing Liabilities, Type [Domain] Risks Inherent in Servicing Assets and Servicing Liabilities, Type [Domain] Interest Rate Risk Interest Rate Risk [Member] Pay fixed receive variable fair value hedge Pay Fixed Receive Variable Fair Value Hedge [Member] Represents information about pay fixed receive variable fair value hedge. Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Interest rate swaps Interest Rate Swap [Member] Interest rate cap Interest Rate Cap [Member] Corporate Bonds Corporate Bond Securities [Member] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Increase to deposit interest expense over next twelve months Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months Number of derivative contracts outstanding Number of Interest Rate Derivatives Held Total notional amount designated as fair flow hedges Derivative Asset, Notional Amount Recognized net losses related to ineffectiveness of hedging relationships Derivative, Net Hedge Ineffectiveness Gain (Loss) Net (increase) reduction in interest expense and net increase (reduction) in interest revenue Derivative, Gain (Loss) on Derivative, Net Collateral pledged toward derivatives Collateral Already Posted, Aggregate Fair Value Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Carrying Amount Reported Value Measurement [Member] Fair Value Estimate of Fair Value Measurement [Member] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Assets: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Securities held to maturity Held-to-maturity Securities, Fair Value Loans, net Loans Receivable, Fair Value Disclosure Loans held for sale Loans Held-for-sale, Fair Value Disclosure Liabilities: Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Deposits Deposits, Fair Value Disclosure Federal Home Loan Bank advances Federal Home Loan Bank Borrowings, Fair Value Disclosure Long-term debt Long-term Debt, Fair Value Computation of basic and diluted earnings per share Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Net income Dividends and undistributed earnings allocated to unvested shares Participating Securities, Distributed and Undistributed Earnings (Loss), Basic Weighted average shares outstanding: Effect of dilutive securities Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] Stock options (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Diluted (in shares) Net income per common share: Earnings Per Share, Basic and Diluted [Abstract] Accounting Changes and Error Corrections [Abstract] Present value of future minimum lease payments Operating Leases, Future Minimum Payments Due Schedule of Financing Receivable, Allowance for Credit Losses [Table] Schedule of Financing Receivable, Allowance for Credit Losses [Table] Financing Receivable, Allowance for Credit Losses [Line Items] Financing Receivable, Allowance for Credit Losses [Line Items] Average balances of impaired loans and income recognized on impaired loans Average Balances Of Impaired Loans And Income Recognized On Impaired Loans [Abstract] Average Balance Impaired Financing Receivable, Average Recorded Investment Interest Revenue Recognized During Impairment Impaired Financing Receivable, Interest Income, Accrual Method Cash Basis Interest Revenue Received Impaired Financing Receivable, Interest Income, Cash Basis Method Four Oaks FinCorp, Inc. Four Oaks Fincorp Inc [Member] Represents information about Four Oaks Fincorp, Inc. HCSB Financial Corporation Hcsb Financial Corporation [Member] Assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Consideration transferred Business Combination, Consideration Transferred Cash consideration Payments to Acquire Businesses, Gross Common stock issued as consideration Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Goodwill Goodwill expected to be tax deductible Business Acquisition, Goodwill, Expected Tax Deductible Amount Provisional value adjustment decrease to acquired loans Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Assets Goodwill adjustment Value of loans acquired separate from the business combination Payments to Acquire Loans Receivable Loans held for sale Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Loans Held For Sale Represents amount of loans held for sale recognized as of the acquisition date. Servicing assets Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Servicing Asset Represents amount of servicing asset recognized as of the acquisition date. Provisional value adjustment increase to loans held for sale Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Loans Held For Sale This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to loans held for sale acquired in connection with a business combination for which the initial accounting was incomplete. Provisional value adjustment decrease to servicing assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Servicing Assets This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to servicing assets acquired in connection with a business combination for which the initial accounting was incomplete. Adjustment to deferred tax asset Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Tax Assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Tax Assets Premises and equipment, net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Provisional value adjustment decrease to premises and equipment Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, and Equipment Repurchase agreements / reverse repurchase agreements, gross amounts of recognized assets Securities Purchased under Agreements to Resell, Gross Repurchase agreements / reverse repurchase agreements, gross amounts offset on the balance sheet Securities Purchased under Agreements to Resell, Liability Repurchase agreements / reverse repurchase agreements, net asset balance Securities Purchased under Agreements to Resell Repurchase agreements / reverse repurchase agreements, gross amounts not offset in balance sheet assets of financial instruments Repurchase And Reverse Repurchase Agreements Gross Amounts Not Off Set In Balance Sheet Assets Of Financial Instruments This element represents amount of gross amounts not offset in the balance sheet assets related to repurchase and reverse repurchase agreements of financial instruments. Repurchase agreements / reverse repurchase agreements, gross amounts not offset in balance sheet assets of collateral received Repurchase And Reverse Repurchase Agreements Gross Amounts Not Off Set In Balance Sheet Assets Of Collateral Received This element represents amount of gross amounts not offset in the balance sheet assets related to repurchase and reverse repurchase agreements of collateral received. Repurchase agreements / reverse repurchase agreements, net amount Repurchase And Reverse Repurchase Agreements Net Assets This element represents amount of net assets related to repurchase and reverse repurchase agreements. Derivatives, gross amounts of recognized assets Derivative Asset, Fair Value, Gross Asset Derivatives, gross amounts offset on the balance sheet Derivative Asset, Fair Value, Amount Offset Against Collateral Derivatives, net asset balance Derivative Asset, Fair Value, Amount Not Offset Against Collateral Derivatives, gross amounts not offset in balance sheet assets of financial instruments Derivative Asset, Not Offset, Policy Election Deduction Derivative, gross amounts not offset in balance sheet assets of collateral received Derivative Asset, Fair Value of Collateral Derivatives, net amount Derivative Asset, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election Offsetting assets, gross amounts of recognized assets Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Gross Offsetting assets, gross amounts offset on balance sheet Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Liability Offsetting assets, net asset balance Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed Offsetting assets, gross amounts not offset in balance sheet of financial instruments Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Not Offset, Policy Election Deduction Offsetting assets, gross amounts not offset in the balance sheet of collateral received Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Amount Offset Against Collateral Offsetting assets, net amount Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election Weighted average interest rate of reverse repurchase agreements, assets (percent) Weighted Average Interest Rate Of Reverse Repurchase Agreements Assets This element represents percentage of weighted average interest rate of reverse repurchase agreements related to assets. Repurchase agreements / reverse repurchase agreements, gross amounts of recognized liabilities Securities Sold under Agreements to Repurchase, Gross Repurchase agreements / reverse repurchase agreements, gross amounts offset on balance sheet Securities Sold under Agreements to Repurchase, Asset Repurchase agreements / reverse repurchase agreements, net liability balance Securities Sold under Agreements to Repurchase Repurchase agreements / reverse repurchase agreements, gross amounts not offset in balance sheet liabilities of financial instruments Repurchase And Reverse Repurchase Agreements Gross Amounts Not Off Set In Balance Sheet Liabilities Of Financial Instruments This element represents amount of gross amounts not offset in the balance sheet liabilities related to repurchase and reverse repurchase agreements of financial instruments. Repurchase agreements / reverse repurchase agreements, gross amounts not offset in balance sheet liabilities of collateral pledged Repurchase And Reverse Repurchase Agreements Gross Amounts Not Off Set In Balance Sheet Liabilities Of Collateral Pledged This element represents amount of gross amounts not offset in the balance sheet liabilities related to repurchase and reverse repurchase agreements of collateral pledged. Repurchase agreements / reverse repurchase agreements, net amount Repurchase And Reverse Repurchase Agreements Net Liabilities This element represents amount of net liabilities related to repurchase and reverse repurchase agreements. Derivatives, gross amounts of recognized liabilities Derivative Liability, Fair Value, Gross Liability Derivatives, gross amounts offset on balance sheet Derivative Liability, Fair Value, Amount Offset Against Collateral Derivatives, net liability balance Derivative Liability, Fair Value, Amount Not Offset Against Collateral Derivatives, gross amounts not offset in balance sheet liabilities of financial instruments Derivative Liability, Not Offset, Policy Election Deduction Derivatives, gross amounts not offset in balance sheet liabilities of collateral pledged Derivative Liability, Fair Value of Collateral Derivatives, net amount Derivative Liability, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election Offsetting liabilities, gross amounts of recognized liabilities Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Gross Offsetting liabilities, gross amounts offset on balance sheet Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Asset Offsetting liabilities, net liability balance Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned Offsetting liabilities, gross amounts not offset in balance sheet of financial instruments Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Not Offset, Policy Election Deduction Offsetting liabilities, gross amounts not offset in the balance sheet of collateral pledged Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Amount Offset Against Collateral Offsetting liabilities, net amount Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election Weighted average interest rate of reverse repurchase agreements, liabilities (percent) Weighted Average Interest Rate Of Reverse Repurchase Agreements Liabilities This element represents percentage of weighted average interest rate of reverse repurchase agreements related to liabilities. Common and Preferred Stock Issued / Common Stock Issuable Stockholders' Equity Note Disclosure [Text Block] Reclassifications Out of Accumulated Other Comprehensive Income Disclosure of Reclassification Amount [Text Block] Nonrecurring Fair Value, Measurements, Nonrecurring [Member] Loans Assets, Fair Value Disclosure, Nonrecurring Document and Entity Information [Abstract] Document and entity information. Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Trading Symbol Trading Symbol Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves [Domain] Valuation Allowances and Reserves [Domain] Allowance for unfunded commitments Allowance For Unfunded Commitment [Member] Represents information about allowance for unfunded loan commitment. Financing Receivable, Allowance for Credit Losses [Roll Forward] Financing Receivable, Allowance for Credit Losses [Roll Forward] Beginning Balance Financing Receivable, Allowance for Credit Losses Charge-Offs Financing Receivable, Allowance for Credit Losses, Write-downs Recoveries Financing Receivable, Allowance for Credit Losses, Recovery (Release) Provision Ending Balance Assets and Liabilities Measured at Fair Value Fair Value Disclosures [Text Block] Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward] Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward] Balance at beginning of period Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield Additions due to acquisitions Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield, Additions Accretion Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield, Accretion Reclassification from nonaccretable difference Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference Changes in expected cash flows that do not affect nonaccretable difference Changes In Expected Cash Flows That Do Not Affect Nonaccretable Difference Represents changes in expected cash flows that do not affect nonaccretable difference. Balance at end of period Accounting Policies [Abstract] Restricted cash Restricted Cash and Cash Equivalents Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Schedule of computation of basic and diluted earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Financing Receivables Past Due [Table] Schedule of Financing Receivables Past Due [Table] Financing Receivables, Period Past Due [Axis] Financing Receivables, Period Past Due [Axis] Financing Receivables, Period Past Due [Domain] Financing Receivables, Period Past Due [Domain] Loans Past Due, 30 - 59 Days Financing Receivables, 30 to 59 Days Past Due [Member] Loans Past Due, 60 - 89 Days Financing Receivables, 60 to 89 Days Past Due [Member] Loans Past Due, > 90 Days Financing Receivables, Equal to Greater than 90 Days Past Due [Member] Financing Receivable, Recorded Investment, Past Due [Line Items] Financing Receivable, Recorded Investment, Past Due [Line Items] Recorded investment in nonaccrual loans by loan class Financing Receivable, Recorded Investment, Aging [Abstract] Loans Past Due Financing Receivable, Recorded Investment, Past Due Loans Not Past Due Financing Receivable, Recorded Investment, Current Loans Outstanding, Ending Balance Actual revenue included since acquisition date Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Actual net income included since acquisition date Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Supplemental consolidated pro forma revenue Business Acquisition, Pro Forma Revenue Supplemental consolidated pro forma net income Business Acquisition, Pro Forma Net Income (Loss) Schedule of reclassifications out of accumulated other comprehensive income Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Schedule of purchased assets and assumed liabilities Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Schedule of additional information related to acquired loan portfolio at acquisition date Additional Information Related To Acquired Loan [Table Text Block] Tabular disclosure of the amounts recognized as additional information related to the acquired loan. Schedule of actual results and pro forma information Business Acquisition, Pro Forma Information, Nonrecurring Adjustments [Table Text Block] Securitized notes payable Secured Debt [Member] Trust preferred securities Trust Preferred Securities [Member] Represents information of trust preferred securities. NER 15-1 Class C notes Navitas Equipment Receivables Llc 2015-1 Class C Notes [Member] Represents information of Navitas Equipment Receivables LLC 2015-1 Class C notes. NER 15-1 Class D notes Navitas Equipment Receivables Llc 2015-1 Class D Notes [Member] Represents information of Navitas Equipment Receivables LLC 2015-1 Class D notes. NER 16-1 Class A-2 notes Navitas Equipment Receivables Llc 2016-1 Class A 2 Notes [Member] Represents information of Navitas Equipment Receivables LLC 2016-1 Class A-2 notes. NER 16-1 Class B notes Navitas Equipment Receivables Llc 2016-1 Class B Notes [Member] Represents information of Navitas Equipment Receivables LLC 2016-1 Class B notes. NER 16-1 Class C notes Navitas Equipment Receivables Llc 2016-1 Class C Notes [Member] Represents information of Navitas Equipment Receivables LLC 2016-1 Class C notes. NER 16-1 Class D notes Navitas Equipment Receivables Llc 2016-1 Class D Notes [Member] Represents information of Navitas Equipment Receivables LLC 2016-1 Class D notes. Southern Bancorp Capital Trust I Southern Bancorp Capital Trust One [Member] Represents information of Southern bancorp capital trust I. United Community Statutory Trust III United Community Statutory Trust Three [Member] Represents information of United community statutory trust III. Tidelands Statutory Trust I Tidelands Statutory Trust One [Member] Represents information of Tidelands statutory trust one. Tidelands Statutory Trust II Tidelands Statutory Trust Two [Member] Represents information of Tidelands statutory trust two. Four Oaks Statutory Trust I Four Oaks Statutory Trust I [Member] Represents information about Four Oaks Statutory Trust I. Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] LIBOR London Interbank Offered Rate (LIBOR) [Member] Prime Rate Prime Rate [Member] Long-term debt, gross Long-term Debt, Gross Less discount Debt Instrument, Unamortized Discount Long-term debt Long-term Debt Issue date Debt Instrument Issue Year This element represents debt instrument issue year. Stated maturity date Debt Instruments Maturity Year This element represents debt instruments maturity year. Earliest call date Debt Instrument Earliest Call Year This element represents debt instrument earliest call year. Interest rate Debt Instrument, Interest Rate, Stated Percentage Variable rate basis Debt Instrument, Description of Variable Rate Basis Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Schedule of stock option activity Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of restricted stock units activity Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Schedule of summary of amounts outstanding under reverse repurchase agreements Schedule of Repurchase Agreements [Table Text Block] Schedule of repurchase agreements remaining contractual maturity of the agreements Schedule Of Repurchase Agreements Remaining Contractual Maturity Of Agreements [Table Text Block] The entire disclosure for repurchase Agreements Remaining Contractual maturity of the agreements. Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Dividends payable, date to be paid Dividends Payable, Date to be Paid Dividends payable, date of record Dividends Payable, Date of Record Mortgage loans held for sale Mortgages Held-for-sale, Fair Value Disclosure Mortgage loans held for sale outstanding principal balance Mortgage Loans Held For Sale Outstanding Principal Balance Represents mortgage loans held for sale quantified by principal amount, the principle balance held at close of period. Net gains (losses) from changes in fair value of loans Fair Value, Option, Changes in Fair Value, Gain (Loss) Percentage of write down in appraised value of nonaccrual impaired loans Percentage Of Written Down In Appraisal Value Of Nonaccrual Impaired Loans Percentage of written down in appraisal value of nonaccrual impaired loans. Maximum remaining maturity of financial instruments having no defined maturity Maximum Remaining Maturity Of Financial Instruments Having No Defined Maturity Maximum remaining maturity of financial instruments having no defined maturity. Goodwill and Other Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Navitas Credit Corp ("Navitas") Navitas Credit Corp ("Navitas") Represents information about Navitas Credit Corp ("Navitas"). Fair Value Of Purchased Assets And Assumed Liabilities Recorded [Axis] Fair Value Of Purchased Assets And Assumed Liabilities Recorded [Axis] Represents purchased assets and assumed liabilities were recorded at their acquisition date fair values. Fair Value Of Purchased Assets And Assumed Liabilities Recorded [Domain] Fair Value Of Purchased Assets And Assumed Liabilities Recorded [Domain] Represents information of purchased assets and assumed liabilities were recorded at their acquisition date fair values. As Recorded by NLFC As Recorded By Nlfc [Member] Represents information pertaining to information as Recorded by NLFC. Fair Value Adjustments Fair Value Adjustments Hcsb [Member] Represents a fair Value Adjustments for HCSB. Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract] Cash and cash equivalents Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Loans and leases, net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Net deferred tax asset Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent Other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Total assets acquired Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract] Short-term borrowings Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities Long-term debt Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt Other liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Total liabilities assumed Excess of assets acquired over liabilities assumed Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Excess Of Assets Acquired Over Liabilities Assumed Represents amount recognized for assets including goodwill in excess of (less than) the aggregate liabilities assumed. Aggregate fair value adjustments Aggregate Fair Value Adjustments Represents aggregate fair value adjustments. Total identifiable net assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Consideration transferred Business Combination, Consideration Transferred [Abstract] Cash Common stock issued (1,443,987 shares) Total fair value of consideration transferred Goodwill Common stock issued (in shares) Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Acquisitions Business Combination Disclosure [Text Block] Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Cash and due from banks Cash and Due from Banks Interest-bearing deposits in banks Interest-bearing Deposits in Banks and Other Financial Institutions Cash and cash equivalents Cash, Cash Equivalents, and Federal Funds Sold Securities available for sale Securities held to maturity (fair value $291,463 and $321,276) Held-to-maturity Securities Loans held for sale (includes $34,813 and $26,252 at fair value) Loans Receivable Held-for-sale, Net, Not Part of Disposal Group, Mortgage Loans and leases, net of unearned income Loans and leases, net Premises and equipment, net Property, Plant and Equipment, Net Bank owned life insurance Bank Owned Life Insurance Accrued interest receivable Accrued Investment Income Receivable Net deferred tax asset Deferred Tax Assets, Net Derivative financial instruments Derivative Asset Goodwill and other intangible assets Intangible Assets, Net (Including Goodwill) Other assets Other Assets Total assets Assets LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities and Equity [Abstract] Liabilities: Liabilities [Abstract] Demand Demand Deposit Accounts NOW Deposits, Negotiable Order of Withdrawal (NOW) Money market Deposits, Money Market Deposits Savings Deposits, Savings Deposits Time Time Deposits Brokered Brokered Brokered. Total deposits Deposits Short-term borrowings Short-term Debt Federal Home Loan Bank advances Federal Home Loan Bank, Advances, Maturities Summary, Due in Next Twelve Months Long-term debt Derivative financial instruments Derivative Liability Accrued expenses and other liabilities Accrued Liabilities and Other Liabilities Total liabilities Liabilities Shareholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Common stock, $1 par value; 150,000,000 shares authorized; 79,137,810 and 77,579,561 shares issued and outstanding Common Stock, Value, Issued Common stock issuable; 616,549 and 607,869 shares Common Stocks Issuable Common stock issuable. Capital surplus Additional Paid in Capital Accumulated deficit Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Total shareholders' equity Stockholders' Equity Attributable to Parent Total liabilities and shareholders' equity Liabilities and Equity Summary of available for sale securities in an unrealized loss position Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] Fair Value, Less than 12 Months Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than 12 Months Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months. Unrealized Loss, Less than 12 Months Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than 12 Months Accumulated Loss Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months. Fair Value, 12 Months or More Debt Securities Available For Sale Continuous Unrealized Loss Position 12 Months Or Longer Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months. Unrealized Loss, 12 Months or More Debt Securities Available For Sale Continuous Unrealized Loss Position 12 Months Or Longer Accumulated Loss Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer. Fair Value, Total Debt Securities Available For Sale Unrealized Loss Position Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position. Unrealized Loss, Total Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position. Investment securities tax exemption Investment Securities Tax Exemption Represent investment securities tax exemption. Derivative Instruments, Gain (Loss) [Line Items] Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income (Effective Portion) Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Schedule of major classifications of loans and lease portfolio Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Schedule of changes in the value of the accretable yield for acquired loans accounted Schedule Of Changes In Value Of Accretable Yield For Acquired Loans [Table Text Block] Tabular disclosure of changes in value of accretable yield for acquired loans. Schedule of net investment in leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Schedule of minimum future lease payments received from lease contracts Schedule of Financing Receivables, Minimum Payments [Table Text Block] Schedule of balance and activity in the allowance for credit losses by portfolio segment Schedule of Credit Losses Related to Financing Receivables, Current and Noncurrent [Table Text Block] Schedule of recorded investments in individually evaluated impaired loans Impaired Financing Receivables [Table Text Block] Schedule of TDRs including the number of loan contracts restructured and the pre- and post-modification recorded investment Troubled Debt Restructurings on Financing Receivables [Table Text Block] Schedule of average balances of impaired loans and income recognized on impaired loans Average Balances Of Impaired Loans and Income Recognized On Impaired Loans [Table Text Block] Average balances of impaired loans and income recognized on impaired loans. Schedule of recorded investment in nonaccrual loans by loan class Schedule of Financing Receivables, Non Accrual Status [Table Text Block] Schedule of aging of the recorded investment in past due loans Past Due Financing Receivables [Table Text Block] Schedule of risk category of loans by class of loans Financing Receivable Credit Quality Indicators [Table Text Block] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Designated as Hedging Instrument Designated as Hedging Instrument [Member] Fair value hedging Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Derivative assets Derivative Financial Instruments, Assets [Member] Derivative liabilities Derivative Financial Instruments, Liabilities [Member] Brokered CD's Brokered Certificate Of Deposit [Member] Represents the brokered certificate of deposits. Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Derivatives accounted for as hedges, asset derivatives, fair value Fair Value Hedge Assets Derivatives accounted for as hedges, liability derivatives, fair value Fair Value Hedge Liabilities Trading Securities [Table] Trading Securities [Table] Total securities other than mortgage-backed securities Securities Other Than Mortgage Backed Securities [Member] Securities other than mortgage backed securities. Schedule of Trading Securities and Other Trading Assets [Line Items] Schedule of Trading Securities and Other Trading Assets [Line Items] Available-for-Sale, Amortized Cost Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Rolling Maturity [Abstract] Available-for-Sale, Amortized Cost, Within 1 year Available-for-sale Securities, Debt Maturities, Next Rolling Twelve Months, Amortized Cost Basis Available-for-Sale, Amortized Cost, 1 to 5 years Available-for-sale Securities, Debt Maturities, Rolling Year Two Through Five, Amortized Cost Basis Available-for-Sale, Amortized Cost, 5 to 10 years Available-for-sale Securities, Debt Maturities, Rolling Year Six Through Ten, Amortized Cost Basis Available-for-Sale, Amortized Cost, More than 10 years Available-for-sale Securities, Debt Maturities, Rolling after Year Ten, Amortized Cost Basis Amortized Cost Available-for-sale Securities, Amortized Cost Basis Available-for-Sale, Fair Value Available-for-sale Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract] Available-for-Sale, Fair Value, Within 1 year Available-for-sale Securities, Debt Maturities, Next Rolling Twelve Months, Fair Value Available-for-Sale, Fair Value, 1 to 5 years Available-for-sale Securities, Debt Maturities, Rolling Year Two Through Five, Fair Value Available-for-Sale, Fair Value, 5 to 10 years Available-for-sale Securities, Debt Maturities, Rolling Year Six Through Ten, Fair Value Available-for-Sale, Fair Value, More than 10 years Available-for-sale Securities, Debt Maturities, Rolling after Year Ten, Fair Value Fair Value Available-for-sale Securities Held-to-Maturity, Amortized Cost Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract] Held-to-Maturity, Amortized Cost, Within 1 year Held-to-maturity Securities, Debt Maturities, within One Year, Net Carrying Amount Held-to-Maturity, Amortized Cost, 1 to 5 years Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount Held-to-Maturity, Amortized Cost, 5 to 10 years Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount Held-to-Maturity, Amortized Cost, More than 10 years Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount Amortized Cost Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment Held-to-Maturity, Fair Value Held-to-maturity Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract] Held-to-Maturity, Fair Value, Within 1 year Held-to-maturity Securities, Debt Maturities, Next Rolling Twelve Months, Fair Value Held-to-Maturity, Fair Value, 1 to 5 years Held-to-maturity Securities, Debt Maturities, Rolling Year Two Through Five, Fair Value Held-to-Maturity, Fair Value, 5 to 10 years Held-to-maturity Securities, Debt Maturities, Rolling Year Six Through Ten, Fair Value Held-to-Maturity, Fair Value, More than 10 years Held-to-maturity Securities, Debt Maturities, Rolling after Ten Years, Fair Value Fair value Nonaccrual Loans Financing Receivable, Recorded Investment, Nonaccrual Status Statement of Cash Flows [Abstract] Operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation, amortization and accretion Depreciation, Amortization and Accretion, Net Provision for credit losses Stock based compensation Share-based Compensation Deferred income tax expense Deferred Income Tax Expense (Benefit) Securities losses (gains), net Gains from sales of SBA/USDA loans Gains From Sales Of Government Guaranteed Loans Amount of gain or loss from sale of government guaranteed loans. Net losses and write downs on sales of other real estate owned Gains (Losses) on Sales of Other Real Estate Changes in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Other assets and accrued interest receivable Other Assets and Accrued Interest Receivable Other assets and accrued interest receivable. Accrued expenses and other liabilities Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Mortgage loans held for sale Increase (Decrease) in Loans Held-for-sale Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Investment securities held to maturity: Investment Securities Held To Maturity [Abstract] Investment securities held to maturity. Proceeds from maturities and calls of securities held to maturity Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities Purchases of securities held to maturity Payments to Acquire Held-to-maturity Securities Proceeds from sales of securities available for sale Proceeds from Sale of Available-for-sale Securities, Debt Proceeds from maturities and calls of securities available for sale Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities Purchases of securities available for sale Payments to Acquire Available-for-sale Securities, Debt Net increase in loans Payments for (Proceeds from) Loans and Leases Purchase of bank owned life insurance Payment to Acquire Life Insurance Policy, Investing Activities Proceeds from sales of premises and equipment Proceeds from Sale of Property, Plant, and Equipment Purchases of premises and equipment Payments to Acquire Property, Plant, and Equipment Net cash paid for acquisition Payments to Acquire Businesses, Net of Cash Acquired Proceeds from sale of other real estate Proceeds from Sale of Other Real Estate Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Net change in deposits Increase (Decrease) in Deposits Net change in short-term borrowings Proceeds from (Repayments of) Short-term Debt Repayments of long-term debt Repayments of Long-term Debt Proceeds from FHLB advances Proceeds from Federal Home Loan Bank Advances Repayments of FHLB advances Repayments of Federal Home Loan Bank Borrowings Proceeds from issuance of subordinated debt, net of issuance costs Proceeds from Issuance of Subordinated Long-term Debt Proceeds from issuance of common stock for dividend reinvestment and employee benefit plans Proceeds From Issuance Of Common Stock For Dividend Reinvestment and Employee Benefit Plans Amount of cash inflow from the amount received from the stock plan and capital contributions to an entity associated with a dividend reinvestment plan during the period. Proceeds from exercise of stock options Proceeds from Stock Options Exercised Cash paid for shares withheld to cover payroll taxes upon vesting of restricted stock Payments Related to Tax Withholding for Share-based Compensation Cash dividends on common stock Payments of Ordinary Dividends, Common Stock Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Net change in cash and cash equivalents, including restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash and cash equivalents, including restricted cash, at beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash and cash equivalents, including restricted cash, at end of period Supplemental disclosures of cash flow information: Supplemental Cash Flow Information [Abstract] Interest paid Interest Paid, Net Income taxes paid Income Taxes Paid, Net Significant non-cash investing and financing transactions: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Unsettled securities purchases Unsettled Purchases Of Securities Available For Sale Represents amount related to unsettled purchases of securities available for sale. Unsettled government guaranteed loan sales Unsettled Government Guaranteed Loan Sales Represents unsettled government guaranteed loan sale. Transfers of loans to foreclosed properties Real Estate Owned, Transfer to Real Estate Owned Acquisitions: Acquisitions [Abstract] Assets acquired Fair Value of Assets Acquired Liabilities assumed Liabilities Assumed Net assets acquired Net Assets Acquired Represents total amount of assets acquired. Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Loans and Leases Finance, Loans and Leases Receivable, Policy [Policy Text Block] Accounting Standards Updates and Recently Adopted Standards New Accounting Pronouncements, Policy [Policy Text Block] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Restricted Stock Restricted Stock [Member] Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] Employees Employees [Member] Employees. Class of Stock [Line Items] Class of Stock [Line Items] Number of common stock called by warrants (in shares) Class of Warrant or Right, Number of Securities Called by Warrants or Rights Exercise price of warrants (in dollars per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Potentially antidilutive options Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Common shares issuable upon exercise of stock options granted (in shares) Weighted average exercise price of stock options (in dollars per share) Vesting of restricted stock awards (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Customer derivative positions Customer Swap Position [Member] Represents the customer swap positions. Dealer offsets to customer derivative positions Dealer Offset To Customer Swap Position [Member] Represents the dealer offset to customer swap position. Risk participations Risk Participations [Member] Represents information about risk participations. Mortgage banking - loan commitment Mortgage Banking Loan Commitment [Member] Represents information of mortgage banking - loan commitment. Mortgage banking - forward sales commitment Mortgage Banking Forward Sales Commitment [Member] Represents mortgage banking - forward sales commitment. Bifurcated embedded derivatives Bifurcated Embedded Derivative [Member] Represents the bifurcated embedded derivatives. Interest rate caps Dealer offsets to bifurcated embedded derivatives Dealer Offsets To Bifurcated Embedded Derivatives [Member] Represents the dealer offsets to bifurcated embedded derivatives. De-designated hedges De Designated Cash Flow Hedge [Member] Represents de-designated cash flow hedge. Derivatives, Fair Value [Line Items] Interest rate derivative instruments not designated as hedging instruments, assets at fair value Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value Interest rate derivative instruments not designated as hedging instruments, liabilities at fair value Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value Shares issued in connection with DRIP (in shares) Stock Issued During Period, Shares, Dividend Reinvestment Plan Discount on stock price offered under Employee Stock Purchase Program (ESPP) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Discount for Postvesting Restrictions Shares issued through ESPP (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Shares of common stock issuable under deferred compensation plan (in shares) Common Stock Issuable Shares Under Deferred Compensation Plan This element represents common stock issuable shares under deferred compensation plan. Share repurchase program, authorized amount Stock Repurchase Program, Authorized Amount Share repurchase program, remaining authorization Stock Repurchase Program, Remaining Authorized Repurchase Amount Restricted Stock Unit Awards Restricted Stock Units (RSUs) [Member] Stock Options and Restricted Stock Units Awards Stock Options And Restricted Stock Units [Member] Stock Options And Restricted Stock Units [Member] Merger-related and other charges Merger Related And Other Charges [Member] Represents merger related and other charges. Compensation expense Compensation Expense [Member] Compensation Expense [Member] Plan vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Plan exercisable period Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Additional awards remaining available under plan Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Stock options granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Compensation expense Allocated Share-based Compensation Expense Compensation expense related to modification Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost Other operating expense for restricted stock units granted Other Operating Expense For Restricted Stock Units Granted Represents the other operating expense for restricted stock units granted to members of board of directors. Deferred income tax benefit Unrecognized compensation expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Recognition period for unrecognized compensation expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Schedule of Impaired Financing Receivable [Table] Schedule of Impaired Financing Receivable [Table] Financing Receivable, Impaired [Line Items] Financing Receivable, Impaired [Line Items] Loans individually evaluated for impairment by class of loans Unpaid Principal Balance Impaired Financing Receivable, Unpaid Principal Balance [Abstract] Unpaid Principal Balance, With no related allowance recorded Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance Unpaid Principal Balance, With an allowance recorded Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance Unpaid Principal Balance Impaired Financing Receivable, Unpaid Principal Balance Recorded Investment Impaired Financing Receivable, Recorded Investment [Abstract] Recorded Investment, With no related allowance recorded Impaired Financing Receivable, with No Related Allowance, Recorded Investment Recorded Investment, With allowance recorded Impaired Financing Receivable, with Related Allowance, Recorded Investment Recorded Investment Impaired Financing Receivable, Recorded Investment Allowance for Loan Losses Allocated Impaired Financing Receivable, Related Allowance Schedule of carrying amount of goodwill and other intangible assets Schedule of Intangible Assets and Goodwill [Table Text Block] Schedule of changes in the carrying amounts of goodwill Schedule of Goodwill [Table Text Block] Schedule of estimated aggregate amortization expense for future periods for core deposit intangibles and noncompete agreements Finite-lived Intangible Assets Amortization Expense [Table Text Block] U.S. Agencies US Treasury and Government [Member] Assets: Assets, Fair Value Disclosure [Abstract] Deferred compensation plan assets Deferred Compensation Plan Assets Servicing rights for SBA/USDA loans Servicing Asset at Fair Value, Amount Residential mortgage servicing rights Residential Mortgage Servicing Asset at Fair Value, Amount Residential Mortgage Servicing Asset at Fair Value, Amount Total assets Assets, Fair Value Disclosure Liabilities: Liabilities, Fair Value Disclosure [Abstract] Deferred compensation plan liability Deferred Compensation Plan Liability Deferred Compensation Plan Liability Total liabilities Financial and Nonfinancial Liabilities, Fair Value Disclosure Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Accounting Standards Updates and Recently Adopted Standards Accounting Changes and Error Corrections [Text Block] Proceeds from sales Gross gains on sales Debt Securities Available For Sale Realized Gain Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Gross losses on sales Debt Securities Available For Sale Realized Loss Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) Net (losses) gains on sales of securities Debt Securities Available For Sale Realized Gain Loss Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) Income tax benefit attributable to sales Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Schedule of Fair Value, Off-balance Sheet Risks [Table] Schedule of Fair Value, Off-balance Sheet Risks [Table] Commitments to extend credit Commitments to Extend Credit [Member] Letters of credit Letter of Credit [Member] Financial instruments whose contract amounts represent credit risk: Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] Financial instruments Unused Commitments to Extend Credit Remainder of 2018 Operating Leases, Future Minimum Payments Receivable, Remainder of Fiscal Year 2019 Operating Leases, Future Minimum Payments Receivable, in Two Years 2020 Operating Leases, Future Minimum Payments Receivable, in Three Years 2021 Operating Leases, Future Minimum Payments Receivable, in Four Years 2022 Operating Leases, Future Minimum Payments Receivable, in Five Years Thereafter Operating Leases, Future Minimum Payments Receivable, Thereafter Total Operating Leases, Future Minimum Payments Receivable Schedule of derivative financial instruments on consolidated balance sheet Schedule of Interest Rate Derivatives [Table Text Block] Schedule of effect of cash flow hedges on the consolidated statement of income Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Schedule of derivatives in fair value on the consolidated statement of income Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Schedule of gains and losses recognized in income on derivatives not designated as hedging instruments Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Held-to-maturity securities: Held-to-maturity Securities, Unclassified [Abstract] Gross Unrealized Gains Held-to-maturity Securities, Accumulated Unrecognized Holding Gain Gross Unrealized Losses Held-to-maturity Securities, Accumulated Unrecognized Holding Loss Fair Value Fair Value Inputs, Assets, Quantitative Information [Table] Fair Value Inputs, Assets, Quantitative Information [Table] Derivative liabilities - risk participations Derivative Liabilities Risk Participations [Member] Represents derivative liabilities risk participations. Derivative liabilities - other Derivative assets - mortgage Derivative assets - other Derivative Assets Other [Member] Represents information about Derivative assets other. Range [Axis] Range [Axis] Range [Domain] Range [Domain] Weighted Average Weighted Average [Member] Fair Value Inputs, Assets, Quantitative Information [Line Items] Fair Value Inputs, Assets, Quantitative Information [Line Items] Derivative assets Derivative liabilities Valuation Technique Fair Value Measurements, Valuation Techniques Unobservable Inputs Fair Value Measurements, Significant Assumptions Discount rate Fair Value Inputs, Discount Rate Prepayment Rate Fair Value Inputs, Prepayment Rate Pull through rate Fair Value Input Pull Through Rate Represents fair value input Pull through rate. Probable exposure rate Fair Value Inputs, Probable Exposure Rate Percentage of likelihood a loan will not be repaid and exposure rate, used as an input to measure fair value. Probability of default rate Fair Value Inputs, Probability of Default Statement [Table] Statement [Table] Common Stock Common Stock [Member] Common Stock Issuable Common Stock Issuable [Member] Common stock issuable. Capital Surplus Additional Paid-in Capital [Member] Accumulated Deficit Retained Earnings [Member] Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Exercise of stock options (12,000 shares) Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Common stock issued to dividend reinvestment plan and employee benefit plans (9,853 shares and 8,569 shares for the periods ended June 30, 2018 and June 30, 2017, respectively) Common Stock Issued To Dividend Reinvestment Plan and Employee Benefit Plans Value This element represents value of common stock issued to dividend reinvestment plan and employee benefit plans. Common stock issued for acquisition (1,443,987 shares) Stock Issued During Period, Value, Acquisitions Amortization of stock option and restricted stock awards Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Vesting of restricted stock, net of shares surrendered to cover payroll taxes (46,409 shares issued, 47,419 shares deferred and 40,954 shares issued, 58,784 shares deferred for the periods ended June 30, 2018 and June 30, 2017, respectively) Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Deferred compensation plan, net, including dividend equivalents Deferred Compensation Plan Net Including Dividend Equivalents Deferred compensation plan, net, including dividend equivalents. Shares issued from deferred compensation plan, net of shares surrendered to cover payroll taxes (46,000 shares and 32,279 shares for the periods ended June 30, 2018 and June 30, 2017, respectively) Shares Issued From Deferred Compensation Plan Shares Shares issued from deferred compensation plan (5,687 shares). Common stock dividends ($0.27 and $0.18 per share for the periods ended June 30, 2018 and June 30, 2017, respectively) Dividends, Common Stock, Cash Cumulative effect of change in accounting principle Cumulative Effect of New Accounting Principle in Period of Adoption Balance Carrying value of securities pledged to secure public deposits, derivatives and other secured borrowings Pledged Financial Instruments, Not Separately Reported, Securities Number of available-for-sale securities in unrealized loss position Debt Securities Available For Sale Unrealized Loss Position Number Of Positions Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position. Number of held-to-maturity securities in unrealized loss position Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions Minimum future lease payments receivable Estimated residual value of leased equipment Estimated Residual Value Of Leased Equipment Represents amount of estimated residual value of leased equipment. Initial direct costs Initial Direct Costs Represents amount of initial direct costs. Security deposits Security Deposit Liability Purchase accounting premium Investment In Leases Purchase Accounting Premium Represents amount of investment in leases purchase account premium. Unearned income Investment In Leases Unearned Income Represents amount of Unearned income. Net investment in leases Leveraged Lease Investment Commitment for additional fund Commitment For Additional Fund Represents commitment for additional fund. Held to maturity, fair value Loans held for sale, at fair value Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock authorized (in shares) Common Stock, Shares Authorized Common stock issued (in shares) Common Stock, Shares, Issued Common stock outstanding (in shares) Common Stock, Shares, Outstanding Common stock issuable (in shares) Common Stock Issuable, Shares Common stock issuable, shares. Balance Sheet Offsetting and Repurchase Agreements Accounted for as Secured Borrowings Balance Sheet Offsetting And Repurchase Agreements Accounted For As Secured Borrowings [Text Block] The entire disclosure for balance sheet offsetting and repurchase agreements accounted for as secured borrowings. Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] FHLB Federal Home Loan Bank Certificates and Obligations (FHLB) [Member] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Pledged as collateral to secure FHLB advances Loans Pledged as Collateral Carrying value of purchased credit impaired loans Unpaid principal balance of purchased credit impaired ("PCI") loans Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance Remaining accretable fair value mark on loans Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums Loan purchased Financing Receivable, Significant Purchases Net investment in leases Criteria amount for evaluation of impairment Minimum Amount Of Loan Evaluated For Impairment This element represents minimum amount of loan evaluated for impairment. Specific reserves Specific Reserves Allocated To Customers Whose Loan Terms Modified In Troubled Debt Restructurings This element represents specific reserves allocated to customers whose loan terms modified in troubled debt restructurings. Loans outstanding classified as troubled debt restructurings Loans and Leases Receivable, Impaired, Commitment to Lend Gross additional interest income that would have been earned if the nonaccrual loans had performed as per original terms Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans Financing Receivable, Allowance for Credit Losses [Line Items] Allowance for Credit Losses, Individually evaluated for impairment Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment Allowance for Credit Losses, Collectively evaluated for impairment Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Allowance for Credit Losses, PCI Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses Allowance for Credit Losses, Ending balance Loans Outstanding, Individually evaluated for impairment Financing Receivable, Individually Evaluated for Impairment Loans Outstanding, Collectively evaluated for impairment Financing Receivable, Collectively Evaluated for Impairment Securities Marketable Securities [Table Text Block] Statement of Comprehensive Income [Abstract] Net income, Before-tax Amount Net income, Tax (Expense) Benefit Net income, Net of Tax Amount Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Unrealized gains (losses) on available-for-sale securities: Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax [Abstract] Unrealized holding gains (losses) arising during period, Before-tax Amount Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax Unrealized holding gains (losses) arising during period, Tax (Expense) Benefit Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Unrealized holding gains (losses) arising during period, Net of Tax Amount Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Reclassification adjustment for (gains) losses included in net income, Before-tax Amount Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Reclassification adjustment for (gains) losses included in net income, Tax (Expense) Benefit Reclassification adjustment for (gains) losses included in net income, Net of Tax Amount Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Net unrealized gains (losses), Before-tax Amount Other Comprehensive Income Loss Unrealized Holding Gain Loss On Securities Net Of Reclassification and Valuation Allowance Arising During Period Before Tax Other comprehensive income loss unrealized holding gain loss on securities net of reclassification and valuation allowance arising during period before tax. Net unrealized gains (losses), Tax (Expense) Benefit Other Comprehensive Income Loss Unrealized Holding Gain Loss On Securities Net Of Reclassification and Valuation Allowance Arising During Period Tax Effect Other comprehensive income loss unrealized holding gain loss on securities net of reclassification and valuation allowance arising during period tax effect. Net unrealized gains (losses), Net of Tax Amount Other Comprehensive Income Loss Unrealized Holding Gain Loss On Securities Net Of Reclassification and Valuation Allowance Arising During Period Net Of Tax Other comprehensive income loss unrealized holding gain loss on securities net of reclassification and valuation allowance arising during period net of tax. Amortization of losses included in net income on available-for-sale securities transferred to held-to-maturity, Before-tax Amount Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, before Tax Amortization of losses included in net income on available-for-sale securities transferred to held-to-maturity, Tax (Expense) Benefit Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, Tax Amortization of losses included in net income on available-for-sale securities transferred to held-to-maturity, Net of Tax Amount Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, Net of Tax Amortization of losses included in net income on terminated derivative financial instruments that were previously accounted for as cash flow hedges, Before-tax Amount Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax Amortization of losses included in net income on terminated derivative financial instruments that were previously accounted for as cash flow hedges, Tax (Expense) Benefit Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax Amortization of losses included in net income on terminated derivative financial instruments that were previously accounted for as cash flow hedges, Net of Tax Amount Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax Reclassification of disproportionate tax effect related to terminated cash flow hedges, Before-tax Amount Other Comprehensive Income Loss Reclassification Adjustment Of Disproportionate Tax Effect Related To Terminated Cash Flow Hedges During Period Before Tax Represents amount related to Other Comprehensive Income Loss Reclassification Adjustment of disproportionate tax effect related to terminated cash flow hedges During Period Before Tax. Reclassification of disproportionate tax effect related to terminated cash flow hedges, Tax (Expense) Benefit Other Comprehensive Income Loss Reclassification Adjustment Of Disproportionate Tax Effect Related To Terminated Cash Flow Hedges Tax Represents amount related to Other Comprehensive Income Loss Reclassification Adjustment of disproportionate tax effect related to terminated cash flow hedges Tax. Reclassification of disproportionate tax effect related to terminated cash flow hedges, Net of Tax Amount Other Comprehensive Income Loss Reclassification Adjustment Of Disproportionate Tax Effect Related To Terminated Cash Flow Hedges Net Of Tax Represents amount related to Other Comprehensive Income Loss Reclassification Adjustment of disproportionate tax effect related to terminated cash flow hedges Net Of Tax. Net cash flow hedge activity, Before-tax Amount Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax, Portion Attributable to Parent Net cash flow hedge activity, Tax (Expense) Benefit Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax Net cash flow hedge activity, Net of Tax Amount Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent Net actuarial gain (loss) on defined benefit pension plan, Before-tax Amount Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax Net actuarial (gain) loss on defined benefit pension plan, Tax (Expense) Benefit Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax Net actuarial (gain) loss on defined benefit pension plan, Net of Tax Amount Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax Amortization of prior service cost and actuarial losses included in net periodic pension cost for defined benefit pension plan, Before-tax Amount Other Comprehensive Income Loss Amortization Of Prior Service Cost And Actuarial Losses Included In Net Periodic Pension Cost For Defined Benefit Pension Plan Before Tax Amount Other comprehensive income amortization of prior service cost and actuarial losses included in net periodic pension cost for defined benefit pension plan, before tax amount. Amortization of prior service cost and actuarial losses included in net periodic pension cost for defined benefit pension plan, Tax (Expense) Benefit Other Comprehensive Income Loss Amortization Of Prior Service Cost And Actuarial Losses Included In Net Periodic Pension Cost For Defined Benefit Pension Plan Tax Expense Benefit Other comprehensive income amortization of prior service cost and actuarial losses included in net periodic pension cost for defined benefit pension plan, tax expense benefit. Amortization of prior service cost and actuarial losses included in net periodic pension cost for defined benefit pension plan, Net of Tax Amount Other Comprehensive Income Loss Amortization Of Prior Service Cost And Actuarial Losses Include Net Periodic Pension Cost For Defined Benefit Pension Plan Net Of Tax Other comprehensive income amortization of prior service cost and actuarial losses included in net periodic pension cost for defined benefit pension plan, net of tax. Net defined benefit pension plan activity, Before-tax Amount Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent Net defined benefit pension plan activity, Tax (Expense) Benefit Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax Net defined benefit pension plan activity, Net of Tax Amount Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent Total other comprehensive income (loss), Before-tax Amount Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent Total other comprehensive income (loss), Tax (Expense) Benefit Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Total other comprehensive income (loss), net of tax amount Comprehensive income, Before-tax Amount Comprehensive Income Loss Before Tax Comprehensive income (loss) before tax. Comprehensive income, Tax (Expense) Benefit Comprehensive Income Loss Tax Comprehensive income loss tax. Comprehensive income, Net of Tax Amount Comprehensive Income (Loss), Net of Tax, Attributable to Parent Effective tax rate (percent) Effective Income Tax Rate Reconciliation, Percent Additional tax expense related to partial impairment of deferred tax asset due to change in state income tax rate Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount Reverse of dedesignated cash flow hedges Valuation allowance on deferred tax assets Deferred Tax Assets, Valuation Allowance Net deferred tax asset realized based upon future taxable income Deferred Tax Assets, Net of Valuation Allowance Unrecognized income tax benefits Unrecognized Tax Benefits Loans and Leases and Allowance for Credit Losses Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Derivatives and Hedging Activities Derivative Instruments and Hedging Activities Disclosure [Text Block] Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Loan Restructuring Modification [Axis] Loan Restructuring Modification [Axis] Loan Restructuring Modification [Domain] Loan Restructuring Modification [Domain] Rate Reduction Contractual Interest Rate Reduction [Member] Structure Extended Maturity [Member] Other Other Type Of Modification [Member] Represents type of modification other not defined elsewhere. Financing Receivable, Modifications [Line Items] Financing Receivable, Modifications [Line Items] Number of Contracts Financing Receivable, Modifications, Number of Contracts Pre-Modification Outstanding Recorded Investment Financing Receivable, Modifications, Pre-Modification Recorded Investment Post-Modification Outstanding Recorded Investment Financing Receivable, Modifications, Post-Modification Recorded Investment Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Number of Contracts Financing Receivable, Modifications, Subsequent Default, Number of Contracts Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Recorded Investment Financing Receivable, Modifications, Subsequent Default, Recorded Investment Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Core deposit intangible Core Deposits [Member] Noncompete agreement Noncompete Agreements [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Intangible, gross Intangible Assets, Gross (Excluding Goodwill) Less: accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Intangible, net Finite-Lived Intangible Assets, Net Total goodwill and other intangible assets, net Estimated Aggregate Amortization Expense For Future Periods Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Remainder of 2018 Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Five Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Total Customer derivatives and dealer offsets Customer Derivatives And Dealer Offsets [Member] Information of Customer Derivatives And Dealer Offsets. Bifurcated embedded derivatives and dealer offsets Bifurcated Embedded Derivatives And Dealer Offsets [Member] Bifurcated embedded derivatives and dealer offsets. De-designated cash flow hedges Mortgage banking derivatives Mortgage Banking Derivatives [Member] Information of Mortgage banking derivatives. Risk participations Other noninterest income Other Noninterest Income [Member] Information of other noninterest income [Member] Mortgage loan revenue Mortgage Loan Revenue [Member] Information of mortgage loan revenue. Amount of Gain (Loss) Recognized in Income on Derivative Effect of fair value hedging derivative financial instruments on the consolidated statement of operations Derivative, Gain (Loss) on Derivative, Net [Abstract] Amount of Gain (Loss) Recognized in Income on Derivative Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments Amount of Gain (Loss) Recognized in Income on Hedged Item Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge Accounting Policies Significant Accounting Policies [Text Block] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Outstanding at December 31, 2017 (in shares) Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Cancelled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Outstanding at June 30, 2018 (in shares) Weighted-Average Grant-Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Outstanding at December 31, 2017 (in dollars share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (in dollars share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Vested (in dollars share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Cancelled (in dollars share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Outstanding at June 30, 2018 (in dollars share) Weighted-Average Remaining Contractual Term (Years), Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms Aggregate Intrinsic Value, Vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested Aggregate Intrinsic Value, Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding Earnings Per Share Earnings Per Share [Text Block] Schedule of cost basis, gross unrealized gains and losses and fair value of securities held to maturity Held-to-maturity Securities [Table Text Block] Schedule of cost basis, unrealized gains and losses, and fair value of securities available for sale Available-for-sale Securities [Table Text Block] Schedule of held to maturity securities in an unrealized loss position Unrealized Gain Loss On Held To Maturity Securities [Table Text Block] Unrealized gain loss on held to maturity securities. Schedule of available for sale securities in an unrealized loss position Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block] Schedule of summary of securities sales activities Schedule of Realized Gain (Loss) [Table Text Block] Schedule of amortized cost and fair value of available for sale and held to maturity securities by contractual maturity Investments Classified by Contractual Maturity Date [Table Text Block] Schedule of long-term debt Schedule of Long-term Debt Instruments [Table Text Block]