Document and Entity Information [Abstract] Document and entity information. Statement [Table] Class of Stock [Axis] Class of Stock [Domain] Statement [Line Items] Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Document Fiscal Year Focus Document Fiscal Period Focus Current Fiscal Year End Date Entity Filer Category Entity Common Stock, Shares Outstanding Consolidated Statement of Operations [Abstract] Interest revenue: Interest and Dividend Income, Operating [Abstract] Loans, including fees Interest and Fee Income, Loans and Leases Federal Funds Sold Commercial Paper and Deposits In Banks Federal funds sold, reverse repurchase agreements, securities lending, 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 Interest Expense, Money Market Deposits Savings Interest Expense, Savings Deposits Time Interest Expense, Time Deposits Total deposit interest expense Interest Expense, Deposits Federal Funds Purchased Repurchase Agreements and Other Short Term Borrowings Federal funds purchased, repurchase agreements and other short-term borrowings Federal funds purchased, repurchase agreements and other short-term borrowings. Federal Home Loan Bank advances Interest Expense, Federal Home Loan Bank and Federal Reserve Bank Advances, Short-term Long-term debt Interest Expense, Long-term Debt Total interest expense Interest Expense Net interest revenue Interest Income (Expense), Net Provision for loan losses Provision for Loan Losses Expensed Net interest revenue after provision for loan losses Interest Income (Expense), after Provision for Loan Loss Fee revenue: 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 Securities gains, net Net gains on sales of securities Securities gains, net Gain (Loss) on Sale of Securities, Net Loss from prepayment of debt Loss on prepayment of borrowings Gains (Losses) on Extinguishment of Debt Other Noninterest Income, Other Total fee revenue Noninterest Income Total revenue Revenues Operating expenses: Operating Expenses [Abstract] Salaries and employee benefits Labor and Related Expense 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 Foreclosed property Total foreclosed property expense Foreclosed Real Estate Expense 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 Other Other Noninterest Expense Total operating expenses Noninterest Expense Net Income (Loss) Attributable to Parent Net loss Net income (loss) Net income (loss) Preferred stock dividends and discount accretion Total preferred stock dividends Preferred Stock Dividends and Other Adjustments Net income (loss) available to common shareholders Net Income (Loss) Available to Common Stockholders, Basic Net income (loss) available to common shareholders Earnings Per Share, Basic Basic Earnings Per Share, Diluted Diluted Weighted Average Number of Shares Outstanding, Basic Basic Weighted Average Number of Diluted Shares Outstanding Diluted Tax exempt on investment securities Tax exempt on investment securities Consolidated Statement of Comprehensive Income (Loss) [Abstract] Other Comprehensive loss: Other Comprehensive Income (Loss), Net of Tax [Abstract] Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax [Abstract] Unrealized gains (losses) on available for sale securities: Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax Unrealized holding gains (losses) arising during period Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax Reclassification adjustment for gains included in net income Amortization of gains included in net income (loss) on available for sale securities transferred to held to maturity Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, before Tax Amortization of gains included in net income (loss) on derivative financial instrument accounted for as cash flow hedges Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Costs Arising During Period, Net of Tax Amortization of prior service cost and actuarial losses included in net periodic pension cost for defined benefit pension plans Consolidated Balance Sheet [Abstract] Series A Preferred Stock [Member] Series A Preferred Stock Series B Preferred Stock [Member] Series B Preferred Stock Series D Preferred Stock [Member] Series D Preferred Stock 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 Federal Funds Sold Commercial Paper and Short Term Investments Federal funds sold, reverse repurchase agreements, securities lending, commercial paper and short-term investments Federal funds sold, commercial paper and short-term investments. Cash and cash equivalents Cash, Cash Equivalents, and Federal Funds Sold Securities available for sale Available-for-sale Securities Held-to-maturity Securities Securities held to maturity, Carrying Amount Securities held to maturity (fair value $281,336, $343,531 and $369,020) Mortgage loans held for sale Loans Held-for-sale, Mortgages Loans, net of unearned income Total loans Total loans Loans and Leases Receivable, Net of Deferred Income Loans and Leases Receivable, Allowance Less allowance for loan losses Balance end of period Balance beginning of period Total ending allowance balance Loans and Leases Receivable, Net Reported Amount Loans, net, Carrying Amount Loans, net Loans, net Assets Covered by Loss Sharing Agreements with FDIC Total covered assets Assets covered by loss sharing agreements with the FDIC Assets covered by loss sharing agreements with the FDIC. Premises and equipment, net Property, Plant and Equipment, Net Bank owned life insurance Bank Owned Life Insurance Accrued interest receivable Accrued Investment Income Receivable Goodwill and Other Intangible Assets Goodwill and other intangible assets Goodwill and other intangible assets. Foreclosed property Foreclosed property, net Repossessed Assets Other assets Other Assets Assets Total 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 [Abstract] Less than $100,000 Time Deposits, Less than $100,000 Greater than $100,000 Time Deposits, $100,000 or More Brokered Brokered Brokered. Deposits, Carrying Amount Total deposits Deposits Federal Funds Purchased Repurchase Agreements and Other Short Term Borrowings Time Federal funds purchased, repurchase agreements, and other short-term borrowings Federal funds purchased, repurchase agreements, and other short-term borrowings. Federal Home Loan Bank advances, Carrying Amount Federal Home Loan Bank advances Federal Home Loan Bank, Advances, Short-term Long-term debt, Carrying Amount Long-term debt Long-term Debt Unsettled securities purchases Payables To Broker Dealers And Clearing Organizations Accrued expenses and other liabilities Other Liabilities Total liabilities Liabilities Shareholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock Preferred Stock, Value, Issued Common stock Common Stock, Value, Issued Common Stocks Issuable Common stock issuable; 129,270, 93,681 and 88,501 shares Common Stock Issuable. Capital surplus Additional Paid in Capital Retained Earnings (Accumulated Deficit) Accumulated deficit Accumulated other comprehensive (loss) income Accumulated Other Comprehensive Income (Loss), Net of Tax Stockholders' Equity Attributable to Parent Ending balance Beginning balance Total shareholders' equity Liabilities and Equity Total liabilities and shareholders' equity Held-to-maturity Securities, Fair Value Fair value Held to maturity, fair value Preferred stock, par value Preferred stock, par value Preferred stock, shares authorized Preferred Stock, Shares Authorized United's Series B preferred stock issued Preferred stock, shares issued Preferred stock, shares issued Preferred stock, shares outstanding Preferred stock, shares outstanding Common stock, par value Common stock, par value Common stock, shares authorized Common stock, shares authorized Common stock, shares issued Common stock, shares issued Common stock, shares outstanding Common stock, shares outstanding Common stock issuable, shares Common stock issuable, shares Common stock issuable, shares. Consolidated Statement of Changes in Shareholders' Equity [Abstract] Statement, Equity Components [Axis] Equity Component [Domain] Common Stock Common Stock [Member] Common Stock Issuable [Member] Common Stock Issuable Common stock issuable. Capital Surplus Additional Paid In Capital [Member] Retained Earnings [Member] Accumulated Deficit Series F Preferred Stock Series F Preferred Stock [Member] Series G Preferred Stock Series G Preferred Stock [Member] Penalty Received on Incomplete Private Equity Transaction Net of Tax Expense Penalty received on incomplete private equity transaction Penalty received on incomplete private equity transaction, net of tax expense. Preferred for common equity exchange related to tax preservation plan value Preferred for common equity exchange related to tax benefits preservation plan (1,551,126 common shares) Preferred for common equity exchange related to tax preservation plan, value. Stock Issued During Period, Value, Conversion of Convertible Securities Conversion of Series F and Series G Preferred Stock (20,618,156 voting and 15,914,209 non-voting common shares) Common Stock Issued to Dividend Reinvestment Plan and Employee Benefit Plans Shares Common stock issued to dividend Reinvestment plan and employee benefit plans Common stock issued to dividend Reinvestment plan and employee benefit plans (167,873 shares). Common and preferred stock issued value Common and preferred stock issued (3,467,699 common shares) Common and preferred stock issued, value. Amortization of Stock Option and Restricted Stock Amortization of stock option and restricted stock awards Amortization of stock option and restricted stock. Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Vesting of restricted stock 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 Shares Shares issued from deferred compensation plan Shares issued from deferred compensation plan (5,687 shares). Tax on Option Exercise and Restricted Stock Vesting Tax on option exercise and restricted stock vesting Tax on option exercise and restricted stock vesting. Dividends on Series Preferred Stock Series A Dividends on Series A preferred stock. Dividends on Series B Preferred Stock Series B Dividends on Series B preferred stock. Dividends on Series D Preferred Stock Series D Dividends on Series D Preferred stock. Preferred for common stock equity exchange related to tax preservation plan shares Preferred for common equity exchange related to tax benefits preservation plan, shares Preferred for common stock equity exchange related to tax preservation plan, shares. Number of Voting Common Shares in Conversion of Series F and Series G Preferred Stock Number of voting common shares in Conversion of Series F and Series G Preferred Stock Number of voting Common shares in conversion of Series F and Series G Preferred stock. Number of Nonvoting Common Shares in Conversion of Series F and Series G Preferred Stock Number of non-voting common shares in Conversion of Series F and Series G Preferred Stock Number of non- voting common shares in conversion of Series F and Series G Preferred stock. Stock Issued During Period Shares Dividend Reinvestment Plan and employee benefit plans Common stock issued to dividend reinvestment plan and employee benefit plans Stock issued during period shares dividend reinvestment plan and employee benefit plans. Common and preferred stock, shares issued Common and preferred stock, shares issued Common and preferred stock, shares issued. Vesting of restricted stock, shares issued Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Vesting of restricted stock shares deferred Vesting of restricted stock, shares deferred Vesting of restricted stock, shares deferred. Number of shares issued from deferred compensation plan Shares issued from deferred compensation plan Number of shares issued from deferred compensation plan. Consolidated Statement of Cash Flows [Abstract] Operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income (loss) to net cash provided by operating activities: Depreciation, amortization and accretion Depreciation, Amortization and Accretion, Net Stock based compensation Share-based Compensation 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 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 [Abstract] Investment securities held to maturity: Investment securities held to maturity. Proceeds from maturities and calls Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities Purchases Payments to Acquire Held-to-maturity Securities Investment securities available for sale: Available-for-sale Securities [Abstract] Proceeds from sales Proceeds from Sale of Available-for-sale Securities Proceeds from maturities and calls Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities Purchases Payments to Acquire Available-for-sale Securities Payments for (Proceeds from) Loans and Leases Net (increase) decrease in loans Proceeds from loan sales Proceeds From Sale Of Notes Receivable Proceeds from sales of premises and equipment Proceeds from Sale of Property, Plant, and Equipment Proceed from Fdic Indemnification Asset Disposals Proceeds collected from FDIC under loss sharing agreements Proceed from FDIC indemnification asset disposals. Purchases of premises and equipment Payments to Acquire Property, Plant, and Equipment Proceeds from sale of other real estate Proceeds from Sale of Other Real Estate Net Cash Provided by (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 Federal Funds Purchased Repurchase Agreements and Other Short Term Borrowings Net change in federal funds purchased, repurchase agreements, and other short-term borrowings Net change in federal funds purchased, repurchase agreements, and other short-term borrowings. Repayments of Federal Home Loan Bank Borrowings Settlement of Federal Home Loan Bank advances