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Loans and Allowance for Loan Losses (Troubled Debt Restructurings) (Details) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 USD ($) Contract | Sep. 30, 2019 USD ($) Contract | Sep. 30, 2020 USD ($) Contract | Sep. 30, 2019 USD ($) Contract
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Contracts | Contract | 80 | 105 | 280 | 241
Recorded Investment | $ 8,144,000 | $ 14,621,000 | $ 60,492,000 | $ 31,352,000
Net charge-offs | $ 0 | $ 0 | $ 0 | $ 0
Total commercial and industrial |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Contracts | Contract | 49 | 34 | 137 | 74
Recorded Investment | $ 5,758,000 | $ 8,177,000 | $ 18,346,000 | $ 15,822,000
Total commercial and industrial | Commercial, financial and agricultural |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Contracts | Contract | 42 | 27 | 118 | 61
Recorded Investment | $ 4,005,000 | $ 4,494,000 | $ 13,243,000 | $ 10,107,000
Total commercial and industrial | Owner-occupied |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Contracts | Contract | 7 | 7 | 19 | 13
Recorded Investment | $ 1,753,000 | $ 3,683,000 | $ 5,103,000 | $ 5,715,000
Total commercial real estate |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Contracts | Contract | 8 | 9 | 24 | 23
Recorded Investment | $ 615,000 | $ 1,624,000 | $ 31,609,000 | $ 3,761,000
Total commercial real estate | Investment properties |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Contracts | Contract | 2 | 4 | 6 | 6
Recorded Investment | $ 387,000 | $ 385,000 | $ 29,056,000 | $ 1,048,000
Total commercial real estate | 1-4 family properties |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Contracts | Contract | 5 | 4 | 15 | 14
Recorded Investment | $ 188,000 | $ 766,000 | $ 1,972,000 | $ 2,072,000
Total commercial real estate | Land and development |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Contracts | Contract | 1 | 1 | 3 | 3
Recorded Investment | $ 40,000 | $ 473,000 | $ 581,000 | $ 641,000
Total consumer |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Contracts | Contract | 23 | 62 | 119 | 144
Recorded Investment | $ 1,771,000 | $ 4,820,000 | $ 10,537,000 | $ 11,769,000
Total consumer | Consumer mortgages |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Contracts | Contract | 3 | 10 | 19 | 15
Recorded Investment | $ 519,000 | $ 1,126,000 | $ 4,157,000 | $ 2,577,000
Total consumer | Home equity lines |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Contracts | Contract | 17 | 25 | 50 | 50
Recorded Investment | $ 1,119,000 | $ 1,999,000 | $ 3,456,000 | $ 4,426,000
Total consumer | Other consumer loans |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Contracts | Contract | 3 | 27 | 50 | 79
Recorded Investment | $ 133,000 | $ 1,695,000 | $ 2,924,000 | $ 4,766,000
Below Market Interest Rate |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Recorded Investment | 6,511,000 | 8,868,000 | 45,185,000 | 19,416,000
Below Market Interest Rate | Total commercial and industrial |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Recorded Investment | 5,088,000 | 5,399,000 | 12,135,000 | 10,557,000
Below Market Interest Rate | Total commercial and industrial | Commercial, financial and agricultural |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Recorded Investment | 3,335,000 | 2,577,000 | 8,562,000 | 5,703,000
Below Market Interest Rate | Total commercial and industrial | Owner-occupied |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Recorded Investment | 1,753,000 | 2,822,000 | 3,573,000 | 4,854,000
Below Market Interest Rate | Total commercial real estate |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Recorded Investment | 408,000 | 1,624,000 | 30,411,000 | 3,761,000
Below Market Interest Rate | Total commercial real estate | Investment properties |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Recorded Investment | 294,000 | 385,000 | 28,963,000 | 1,048,000
Below Market Interest Rate | Total commercial real estate | 1-4 family properties |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Recorded Investment | 74,000 | 766,000 | 867,000 | 2,072,000
Below Market Interest Rate | Total commercial real estate | Land and development |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Recorded Investment | 40,000 | 473,000 | 581,000 | 641,000
Below Market Interest Rate | Total consumer |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Recorded Investment | 1,015,000 | 1,845,000 | 2,639,000 | 5,098,000
Below Market Interest Rate | Total consumer | Consumer mortgages |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Recorded Investment | 496,000 | 1,008,000 | 1,568,000 | 1,245,000
Below Market Interest Rate | Total consumer | Home equity lines |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Recorded Investment | 471,000 | 364,000 | 926,000 | 2,686,000
Below Market Interest Rate | Total consumer | Other consumer loans |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Recorded Investment | 48,000 | 473,000 | 145,000 | 1,167,000
Other Concessions |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Recorded Investment | 1,633,000 | 5,753,000 | 15,307,000 | 11,936,000
Other Concessions | Total commercial and industrial |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Recorded Investment | 670,000 | 2,778,000 | 6,211,000 | 5,265,000
Other Concessions | Total commercial and industrial | Commercial, financial and agricultural |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Recorded Investment | 670,000 | 1,917,000 | 4,681,000 | 4,404,000
Other Concessions | Total commercial and industrial | Owner-occupied |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Recorded Investment | 0 | 861,000 | 1,530,000 | 861,000
Other Concessions | Total commercial real estate |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Recorded Investment | 207,000 | 0 | 1,198,000 | 0
Other Concessions | Total commercial real estate | Investment properties |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Recorded Investment | 93,000 | 0 | 93,000 | 0
Other Concessions | Total commercial real estate | 1-4 family properties |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Recorded Investment | 114,000 | 0 | 1,105,000 | 0
Other Concessions | Total commercial real estate | Land and development |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Recorded Investment | 0 | 0 | 0 | 0
Other Concessions | Total consumer |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Recorded Investment | 756,000 | 2,975,000 | 7,898,000 | 6,671,000
Other Concessions | Total consumer | Consumer mortgages |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Recorded Investment | 23,000 | 118,000 | 2,589,000 | 1,332,000
Other Concessions | Total consumer | Home equity lines |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Recorded Investment | 648,000 | 1,635,000 | 2,530,000 | 1,740,000
Other Concessions | Total consumer | Other consumer loans |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Recorded Investment | $ 85,000 | $ 1,222,000 | $ 2,779,000 | $ 3,599,000

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