0000001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 0000002 - Document - Audit Information link:presentationLink link:calculationLink link:definitionLink 0000003 - Statement - Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 0000004 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 0000005 - Statement - Consolidated Statements of Income link:presentationLink link:calculationLink link:definitionLink 0000006 - Statement - Consolidated Statements of Comprehensive Income (Loss) link:presentationLink link:calculationLink link:definitionLink 0000006 - Statement - Consolidated Statements of Comprehensive Income (Loss) link:presentationLink link:calculationLink link:definitionLink 0000007 - Statement - Consolidated Statements of Changes in Shareholders' Equity link:presentationLink link:calculationLink link:definitionLink 0000008 - Statement - Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 0000009 - Statement - Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 0000010 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 0000011 - Disclosure - Accounting Standards Updates and Recently Adopted Standards link:presentationLink link:calculationLink link:definitionLink 0000012 - Disclosure - Acquisitions link:presentationLink link:calculationLink link:definitionLink 0000013 - Disclosure - Supplemental Cash Flow Information link:presentationLink link:calculationLink link:definitionLink 0000014 - Disclosure - Investments link:presentationLink link:calculationLink link:definitionLink 0000015 - Disclosure - Loans and Leases and Allowance for Credit Losses link:presentationLink link:calculationLink link:definitionLink 0000016 - Disclosure - Premises and Equipment link:presentationLink link:calculationLink link:definitionLink 0000017 - Disclosure - Derivatives and Hedging Activities link:presentationLink link:calculationLink link:definitionLink 0000018 - Disclosure - Goodwill and Other Intangible Assets link:presentationLink link:calculationLink link:definitionLink 0000019 - Disclosure - Servicing Assets and Liabilities link:presentationLink link:calculationLink link:definitionLink 0000020 - Disclosure - Time Deposits link:presentationLink link:calculationLink link:definitionLink 0000021 - Disclosure - Short-term Borrowings and Federal Home Loan Bank Advances link:presentationLink link:calculationLink link:definitionLink 0000022 - Disclosure - Long-term Debt link:presentationLink link:calculationLink link:definitionLink 0000023 - Disclosure - Operating Leases link:presentationLink link:calculationLink link:definitionLink 0000024 - Disclosure - Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 0000025 - Disclosure - Common and Preferred Stock link:presentationLink link:calculationLink link:definitionLink 0000026 - Disclosure - Equity Compensation Plans link:presentationLink link:calculationLink link:definitionLink 0000027 - Disclosure - Reclassifications Out of AOCI link:presentationLink link:calculationLink link:definitionLink 0000028 - Disclosure - Earnings Per Share link:presentationLink link:calculationLink link:definitionLink 0000029 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 0000030 - Disclosure - Benefit Plans link:presentationLink link:calculationLink link:definitionLink 0000031 - Disclosure - Regulatory Matters link:presentationLink link:calculationLink link:definitionLink 0000032 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 0000033 - Disclosure - Condensed Financial Statements of United Community Banks, Inc. (Holding Company Only) link:presentationLink link:calculationLink link:definitionLink 0000034 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 0000035 - Disclosure - Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 0000036 - Disclosure - Acquisitions (Tables) link:presentationLink link:calculationLink link:definitionLink 0000037 - Disclosure - Supplemental Cash Flow Information (Tables) link:presentationLink link:calculationLink link:definitionLink 0000038 - Disclosure - Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 0000039 - Disclosure - Loans and Leases and Allowance for Credit Losses (Tables) link:presentationLink link:calculationLink link:definitionLink 0000040 - Disclosure - Premises and Equipment (Tables) link:presentationLink link:calculationLink link:definitionLink 0000041 - Disclosure - Derivatives and Hedging Activities (Tables) link:presentationLink link:calculationLink link:definitionLink 0000042 - Disclosure - Goodwill and Other Intangible Assets (Tables) link:presentationLink link:calculationLink link:definitionLink 0000043 - Disclosure - Servicing Assets and Liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 0000044 - Disclosure - Time Deposits (Tables) link:presentationLink link:calculationLink link:definitionLink 0000045 - Disclosure - Short-term Borrowings and Federal Home Loan Bank Advances (Tables) link:presentationLink link:calculationLink link:definitionLink 0000046 - Disclosure - Long-term Debt (Tables) link:presentationLink link:calculationLink link:definitionLink 0000047 - Disclosure - Operating Leases (Tables) link:presentationLink link:calculationLink link:definitionLink 0000048 - Disclosure - Fair Value Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 0000049 - Disclosure - Equity Compensation Plans (Tables) link:presentationLink link:calculationLink link:definitionLink 0000050 - Disclosure - Reclassifications Out of AOCI (Tables) link:presentationLink link:calculationLink link:definitionLink 0000051 - Disclosure - Earnings Per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 0000052 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 0000053 - Disclosure - Benefit Plans (Tables) link:presentationLink link:calculationLink link:definitionLink 0000054 - Disclosure - Regulatory Matters (Tables) link:presentationLink link:calculationLink link:definitionLink 0000055 - Disclosure - Commitments and Contingencies (Tables) link:presentationLink link:calculationLink link:definitionLink 0000056 - Disclosure - Condensed Financial Statements of United Community Banks, Inc. (Holding Company Only) (Tables) link:presentationLink link:calculationLink link:definitionLink 0000057 - Disclosure - Summary of Significant Accounting Policies (Details) link:presentationLink link:calculationLink link:definitionLink 0000058 - Disclosure - Acquisitions - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000059 - Disclosure - Acquisitions - Acquisition date fair value of purchased assets and assumed liabilities and supplementary information (Details) link:presentationLink link:calculationLink link:definitionLink 0000060 - Disclosure - Acquisitions - Pro forma information (Details) link:presentationLink link:calculationLink link:definitionLink 0000061 - Disclosure - Supplemental Cash Flow Information (Details) link:presentationLink link:calculationLink link:definitionLink 0000062 - Disclosure - Investments - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000063 - Disclosure - Investments - Cost basis, unrealized gains and losses, and fair value of debt securities HTM (Details) link:presentationLink link:calculationLink link:definitionLink 0000064 - Disclosure - Investments - Cost basis, unrealized gains and losses, and fair value of AFS debt securities (Details) link:presentationLink link:calculationLink link:definitionLink 0000065 - Disclosure - Investments - HTM debt securities in unrealized loss position (Details) link:presentationLink link:calculationLink link:definitionLink 0000066 - Disclosure - Investments - AFS debt securities in unrealized loss position (Details) link:presentationLink link:calculationLink link:definitionLink 0000067 - Disclosure - Investments - Accrued interest receivable (Details) link:presentationLink link:calculationLink link:definitionLink 0000068 - Disclosure - Investments - Amortized cost and fair value of AFS and HTM debt securities by contractual maturity (Details) link:presentationLink link:calculationLink link:definitionLink 0000069 - Disclosure - Investments - Securities sales activity (Details) link:presentationLink link:calculationLink link:definitionLink 0000070 - Disclosure - Investments - Schedule of Equity Method Investments (Details) link:presentationLink link:calculationLink link:definitionLink 0000071 - Disclosure - Loans and Leases and Allowance for Credit Losses - Major classifications of loan and lease portfolio (Details) link:presentationLink link:calculationLink link:definitionLink 0000072 - Disclosure - Loans and Leases and Allowance for Credit Losses - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000073 - Disclosure - Loans and Leases and Allowance for Credit Losses - Loans sold (Details) link:presentationLink link:calculationLink link:definitionLink 0000074 - Disclosure - Loans and Leases and Allowance for Credit Losses - Components of net investment in leases (Details) link:presentationLink link:calculationLink link:definitionLink 0000075 - Disclosure - Loans and Leases and Allowance for Credit Losses - Minimum future lease payments expected to be received from equipment financing lease contracts (Details) link:presentationLink link:calculationLink link:definitionLink 0000076 - Disclosure - Loans and Leases and Allowance for Credit Losses - Loans by aging category and accrual status (Details) link:presentationLink link:calculationLink link:definitionLink 0000077 - Disclosure - Loans and Leases and Allowance for Credit Losses - Nonaccrual loans by loan class (Details) link:presentationLink link:calculationLink link:definitionLink 0000078 - Disclosure - Loans and Leases and Allowance for Credit Losses - Risk category of term loans by vintage year (Details) link:presentationLink link:calculationLink link:definitionLink 0000079 - Disclosure - Loans and Leases and Allowance for Credit Losses - Loans modified under terms of TDR (Details) link:presentationLink link:calculationLink link:definitionLink 0000080 - Disclosure - Loans and Leases and Allowance for Credit Losses - Balance and activity in the ACL by portfolio segment (Details) link:presentationLink link:calculationLink link:definitionLink 0000081 - Disclosure - Premises and Equipment - Summary (Details) link:presentationLink link:calculationLink link:definitionLink 0000082 - Disclosure - Premises and Equipment - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000083 - Disclosure - Derivatives and Hedging Activities - Fair value of derivative financial instruments (Details) link:presentationLink link:calculationLink link:definitionLink 0000084 - Disclosure - Derivatives and Hedging Activities - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000085 - Disclosure - Derivatives and Hedging Activities - Effect of derivatives in hedging relationships (Details) link:presentationLink link:calculationLink link:definitionLink 0000086 - Disclosure - Derivatives and Hedging Activities - Gains and losses recognized in income on derivatives not designated as hedging instruments (Details) link:presentationLink link:calculationLink link:definitionLink 0000087 - Disclosure - Goodwill and Other Intangible Assets - Carrying amount (Details) link:presentationLink link:calculationLink link:definitionLink 0000088 - Disclosure - Goodwill and Other Intangible Assets - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000089 - Disclosure - Goodwill and Other Intangible Assets - Changes in carrying amount of goodwill (Details) link:presentationLink link:calculationLink link:definitionLink 0000090 - Disclosure - Goodwill and Other Intangible Assets - Estimated aggregate amortization expense for future periods (Details) link:presentationLink link:calculationLink link:definitionLink 0000091 - Disclosure - Servicing Assets and Liabilities - Changes in SBA/USDA loans servicing rights (Details) link:presentationLink link:calculationLink link:definitionLink 0000092 - Disclosure - Servicing Assets and Liabilities - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000093 - Disclosure - Servicing Assets and Liabilities - Key characteristics, inputs, and economic assumptions for SBA/USDA loans and related sensitivity (Details) link:presentationLink link:calculationLink link:definitionLink 0000094 - Disclosure - Servicing Assets and Liabilities - Changes in residential mortgage loans servicing rights (Details) link:presentationLink link:calculationLink link:definitionLink 0000095 - Disclosure - Servicing Assets and Liabilities - Key characteristics, inputs, and economic assumptions for residential mortgage loans and related sensitivity (Details) link:presentationLink link:calculationLink link:definitionLink 0000096 - Disclosure - Time Deposits - Contractual maturities of time deposits (Details) link:presentationLink link:calculationLink link:definitionLink 0000097 - Disclosure - Time Deposits - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000098 - Disclosure - Short-term Borrowings and Federal Home Loan Bank Advances - Schedule of Repurchase Agreements are Secured Borrowings (Details) link:presentationLink link:calculationLink link:definitionLink 0000099 - Disclosure - Short-term Borrowings and Federal Home Loan Bank Advances - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000100 - Disclosure - Long-term Debt - Schedule of long-term debt (Details) link:presentationLink link:calculationLink link:definitionLink 0000101 - Disclosure - Long-term Debt - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000102 - Disclosure - Operating Leases - ROU asset and operating lease liability (Details) link:presentationLink link:calculationLink link:definitionLink 0000103 - Disclosure - Operating Leases - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000104 - Disclosure - Operating Leases - Operating lease income and expense and other supplemental information (Details) link:presentationLink link:calculationLink link:definitionLink 0000105 - Disclosure - Operating Leases - Future minimum lease payments (Details) link:presentationLink link:calculationLink link:definitionLink 0000105 - Disclosure - Operating Leases - Future minimum lease payments (Details) link:presentationLink link:calculationLink link:definitionLink 0000106 - Disclosure - Fair Value Measurements - Assets and liabilities measured at fair value on recurring basis (Details) link:presentationLink link:calculationLink link:definitionLink 0000107 - Disclosure - Fair Value Measurements - Reconciliation for measurements at fair value on a recurring basis using significant unobservable inputs (Details) link:presentationLink link:calculationLink link:definitionLink 0000108 - Disclosure - Fair Value Measurements - Quantitative information about Level 3 measurements for fair value on a recurring basis (Details) link:presentationLink link:calculationLink link:definitionLink 0000109 - Disclosure - Fair Value Measurements - Fair value option (Details) link:presentationLink link:calculationLink link:definitionLink 0000110 - Disclosure - Fair Value Measurements - Assets and liabilities measured at fair value on nonrecurring basis (Details) link:presentationLink link:calculationLink link:definitionLink 0000111 - Disclosure - Fair Value Measurements - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000112 - Disclosure - Fair Value Measurements - Fair values for other financial instruments that are not measured at fair value on recurring basis (Details) link:presentationLink link:calculationLink link:definitionLink 0000113 - Disclosure - Common and Preferred Stock (Details) link:presentationLink link:calculationLink link:definitionLink 0000114 - Disclosure - Equity Compensation Plans - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000115 - Disclosure - Equity Compensation Plans - Restricted stock units and options outstanding activity (Details) link:presentationLink link:calculationLink link:definitionLink 0000116 - Disclosure - Reclassifications Out of AOCI (Details) link:presentationLink link:calculationLink link:definitionLink 0000117 - Disclosure - Earnings Per Share - Computation of basic and diluted earnings per share (Details) link:presentationLink link:calculationLink link:definitionLink 0000118 - Disclosure - Earnings Per Share - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000119 - Disclosure - Income Taxes - Income tax expense (Details) link:presentationLink link:calculationLink link:definitionLink 0000120 - Disclosure - Income Taxes - Differences between provision for income taxes and amount computed as statutory rate (Details) link:presentationLink link:calculationLink link:definitionLink 0000121 - Disclosure - Income Taxes - Deferred taxes (Details) link:presentationLink link:calculationLink link:definitionLink 0000122 - Disclosure - Income Taxes - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000123 - Disclosure - Income Taxes - Reconciliation of unrecognized tax benefits (Details) link:presentationLink link:calculationLink link:definitionLink 0000124 - Disclosure - Benefit Plans - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000125 - Disclosure - Benefit Plans - Weighted-average assumptions to determine pension benefit obligation (Details) link:presentationLink link:calculationLink link:definitionLink 0000126 - Disclosure - Benefit Plans - Changes in obligations and plan assets (Details) link:presentationLink link:calculationLink link:definitionLink 0000127 - Disclosure - Benefit Plans - Components of net periodic benefit cost (Details) link:presentationLink link:calculationLink link:definitionLink 0000128 - Disclosure - Benefit Plans - Estimated future benefit payments expected to be paid (Details) link:presentationLink link:calculationLink link:definitionLink 0000129 - Disclosure - Regulatory Matters - Regulatory capital ratios and minimum amounts required (Details) link:presentationLink link:calculationLink link:definitionLink 0000130 - Disclosure - Regulatory Matters - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000131 - Disclosure - Commitments and Contingencies - Contractual amount of off-balance sheet instruments (Details) link:presentationLink link:calculationLink link:definitionLink 0000132 - Disclosure - Commitment and Contingencies - Schedule of tax credit and certain equity method investments (Details) link:presentationLink link:calculationLink link:definitionLink 0000133 - Disclosure - Condensed Financial Statements of United Community Banks, Inc. (Holding Company Only) - Balance Sheets (Details) link:presentationLink link:calculationLink link:definitionLink 0000134 - Disclosure - Condensed Financial Statements of United Community Banks, Inc. (Holding Company Only) - Statements of Income (Details) link:presentationLink link:calculationLink link:definitionLink 0000135 - Disclosure - Condensed Financial Statements of United Community Banks, Inc. (Holding Company Only) - Statements of Cash Flows (Details) link:presentationLink link:calculationLink link:definitionLink 0000136 - Disclosure - Subsequent Events (Details) link:presentationLink link:calculationLink link:definitionLink