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Loans (Aging Of Recorded Investment In Past Due Loans) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | $ 20,021 |  |  | $ 20,021 |  |  | $ 29,919 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 27,185 | [1] |  | 27,185 | [1] |  | 19,602 | [2]
Total loans past due |  | 47,206 |  |  | 47,206 |  |  | 49,521 |
Total current |  | 6,376,549 |  |  | 6,376,549 |  |  | 5,660,277 |
Recorded Investment |  | 6,423,755 |  |  | 6,423,755 |  |  | 5,709,798 |
Loans past due 90 days or more and accruing |  | 3,348 |  |  | 3,348 |  |  | 2,302 |
Impaired Financing Receivable, Recorded Investment, Nonaccrual loans which are current in regards to contractual P&I payments |  | 65,700 |  |  | 65,700 |  |  | 50,700 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 7,866 |  | $ 3,704 | 16,229 |  | $ 6,566 |  |
Construction Real Estate Commercial [Domain] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 2,023 | [1] |  | 2,023 | [1] |  | 1,635 | [2]
Total loans past due |  | 2,023 |  |  | 2,023 |  |  | 1,635 |
Total current |  | 222,357 |  |  | 222,357 |  |  | 174,466 |
Recorded Investment |  | 224,380 |  |  | 224,380 |  |  | 176,101 |
Loans past due 90 days or more and accruing |  | 235 |  |  | 235 |  |  | 0 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 82 |  |  | 82 |  | 0 |  |
Commercial Financial And Agricultural [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 2,570 |  |  | 2,570 |  |  | 4,786 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 10,602 | [1] |  | 10,602 | [1] |  | 1,375 | [2]
Total loans past due |  | 13,172 |  |  | 13,172 |  |  | 6,161 |
Total current |  | 1,132,370 |  |  | 1,132,370 |  |  | 1,071,228 |
Loans past due 90 days or more and accruing |  | 0 |  |  | 0 |  |  | 10 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 5,754 |  | 574 | 9,296 |  | 800 |  |
Construction Real Estate - Mortgage [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 118 |  |  | 118 |  |  | 133 |
Past due nonaccrual loans and loans past due 90 days or more and accruing | [2] |  |  |  |  |  |  | 20 |
Total loans past due |  | 118 |  |  | 118 |  |  | 153 |
Total current |  | 93,099 |  |  | 93,099 |  |  | 70,539 |
Recorded Investment |  | 93,217 |  |  | 93,217 |  |  | 70,692 |
Loans past due 90 days or more and accruing |  | 0 |  |  | 0 |  |  | 20 |
Financing Receivable, Modifications, Recorded Investment, During Period |  |  |  |  | 0 |  | 0 |  |
Construction Real Estate - Installment [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  |  |  |  |  |  |  | 28 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 12 | [1] |  | 12 | [1] |  | 19 | [2]
Total loans past due |  | 12 |  |  | 12 |  |  | 47 |
Total current |  | 1,574 |  |  | 1,574 |  |  | 2,393 |
Recorded Investment |  | 1,586 |  |  | 1,586 |  |  | 2,440 |
Loans past due 90 days or more and accruing |  | 12 |  |  | 12 |  |  | 0 |
Financing Receivable, Modifications, Recorded Investment, During Period |  |  |  |  | 0 |  | 12 |  |
Residential Real Estate Commercial [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 40 |  |  | 40 |  |  | 683 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 791 | [1] |  | 791 | [1] |  | 1,104 | [2]
Total loans past due |  | 831 |  |  | 831 |  |  | 1,787 |
Total current |  | 466,024 |  |  | 466,024 |  |  | 429,093 |
Recorded Investment |  | 466,855 |  |  | 466,855 |  |  | 430,880 |
Loans past due 90 days or more and accruing |  | 0 |  |  | 0 |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 13 |  | 304 | 49 |  | 304 |  |
Residential Real Estate - Mortgage [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 10,196 |  |  | 10,196 |  |  | 13,210 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 9,508 | [1] |  | 9,508 | [1] |  | 8,553 | [2]
Total loans past due |  | 19,704 |  |  | 19,704 |  |  | 21,763 |
Total current |  | 1,156,246 |  |  | 1,156,246 |  |  | 1,113,742 |
Recorded Investment |  | 1,175,950 |  |  | 1,175,950 |  |  | 1,135,505 |
Loans past due 90 days or more and accruing |  | 1,641 |  |  | 1,641 |  |  | 1,124 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 501 |  | 246 | 1,013 |  | 1,062 |  |
Residential Real Estate - HELOC [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 570 |  |  | 570 |  |  | 620 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 845 | [1] |  | 845 | [1] |  | 907 | [2]
Total loans past due |  | 1,415 |  |  | 1,415 |  |  | 1,527 |
Total current |  | 230,777 |  |  | 230,777 |  |  | 214,915 |
Recorded Investment |  | 232,192 |  |  | 232,192 |  |  | 216,442 |
Loans past due 90 days or more and accruing |  | 56 |  |  | 56 |  |  | 9 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 138 |  | 469 | 364 |  | 860 |  |
Residential Real Estate - Installment [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 45 |  |  | 45 |  |  | 155 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 269 | [1] |  | 269 | [1] |  | 274 | [2]
Total loans past due |  | 314 |  |  | 314 |  |  | 429 |
Total current |  | 12,747 |  |  | 12,747 |  |  | 13,934 |
Recorded Investment |  | 13,061 |  |  | 13,061 |  |  | 14,363 |
Loans past due 90 days or more and accruing |  | 0 |  |  | 0 |  |  | 24 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 421 |  | 336 | 1,003 |  | 453 |  |
Commercial Financial And Agricultural [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Recorded Investment | [3] | 1,145,542 |  |  | 1,145,542 |  |  | 1,077,389 |
Commercial Real Estate [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 673 |  |  | 673 |  |  | 780 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 1,354 | [1] |  | 1,354 | [1] |  | 3,584 | [2]
Total loans past due |  | 2,027 |  |  | 2,027 |  |  | 4,364 |
Total current |  | 1,603,437 |  |  | 1,603,437 |  |  | 1,283,431 |
Recorded Investment | [3] | 1,605,464 |  |  | 1,605,464 |  |  | 1,287,795 |
Loans past due 90 days or more and accruing |  | 625 |  |  | 625 |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 241 |  | 1,154 | 3,236 |  | 1,859 |  |
Consumer [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 5,758 |  |  | 5,758 |  |  | 9,524 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 1,572 | [1] |  | 1,572 | [1] |  | 2,131 | [2]
Total loans past due |  | 7,330 |  |  | 7,330 |  |  | 11,655 |
Total current |  | 1,427,016 |  |  | 1,427,016 |  |  | 1,284,237 |
Recorded Investment |  | 1,434,346 |  |  | 1,434,346 |  |  | 1,295,892 |
Loans past due 90 days or more and accruing |  | 570 |  |  | 570 |  |  | 1,115 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 716 |  | 621 | 1,186 |  | 1,216 |  |
Finance Leases Portfolio Segment [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 51 |  |  | 51 |  |  | 0 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 209 | [1] |  | 209 | [1] |  | 0 | [2]
Total loans past due |  | 260 |  |  | 260 |  |  | 0 |
Total current |  | 30,902 |  |  | 30,902 |  |  | 2,299 |
Recorded Investment |  | 31,162 |  |  | 31,162 |  |  | 2,299 |
Loans past due 90 days or more and accruing |  | 209 |  |  | 209 |  |  | $ 0 |
Accruing Financing Receivable Modifications [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 1,745 |  | 897 | 4,943 |  | 2,043 |  |
Accruing Financing Receivable Modifications [Member] | Construction Real Estate Commercial [Domain] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 82 |  |  | 82 |  | 0 |  |
Accruing Financing Receivable Modifications [Member] | Commercial Financial And Agricultural [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 752 |  | 22 | 3,237 |  | 208 |  |
Accruing Financing Receivable Modifications [Member] | Construction Real Estate - Mortgage [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 0 |  | 0 | 0 |  | 0 |  |
Accruing Financing Receivable Modifications [Member] | Construction Real Estate - Installment [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 0 |  | 0 | 0 |  | 12 |  |
Accruing Financing Receivable Modifications [Member] | Residential Real Estate Commercial [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 13 |  | 55 | 13 |  | 55 |  |
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - Mortgage [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 286 |  | 0 | 340 |  | 90 |  |
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - HELOC [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 31 |  | 453 | 121 |  | 735 |  |
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - Installment [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 407 |  | 336 | 951 |  | 437 |  |
Accruing Financing Receivable Modifications [Member] | Commercial Real Estate [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  |  |  |  | 0 |  | 447 |  |
Accruing Financing Receivable Modifications [Member] | Consumer [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 174 |  | 31 | 199 |  | 59 |  |
Nonaccruing Financing Receivable Modifications [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 6,121 |  | 2,807 | 11,286 |  | 4,523 |  |
Nonaccruing Financing Receivable Modifications [Member] | Construction Real Estate Commercial [Domain] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  |  |  |  | 0 |  | 0 |  |
Nonaccruing Financing Receivable Modifications [Member] | Commercial Financial And Agricultural [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 5,002 |  | 552 | 6,059 |  | 592 |  |
Nonaccruing Financing Receivable Modifications [Member] | Construction Real Estate - Mortgage [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  |  |  |  | 0 |  | 0 |  |
Nonaccruing Financing Receivable Modifications [Member] | Construction Real Estate - Installment [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  |  |  |  | 0 |  | 0 |  |
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate Commercial [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  |  |  | 249 | 36 |  | 249 |  |
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Mortgage [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 215 |  | 246 | 673 |  | 972 |  |
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - HELOC [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 107 |  | 16 | 243 |  | 125 |  |
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Installment [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 14 |  |  | 52 |  | 16 |  |
Nonaccruing Financing Receivable Modifications [Member] | Commercial Real Estate [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 241 |  | 1,154 | 3,236 |  | 1,412 |  |
Nonaccruing Financing Receivable Modifications [Member] | Consumer [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | $ 542 |  | $ 590 | $ 987 |  | $ 1,157 |  |
[1] | 1) Includes an aggregate of $3.3 million of loans past due 90 days or more and accruing. The remaining loans were past due nonaccrual loans.(2) Includes an aggregate of $65.7 million of nonaccrual loans which were current in regards to contractual principal and interest payments
[2] | 1) Includes an aggregate of $2.3 million of loans past due 90 days or more and accruing. The remaining loans were past due nonaccrual loans.(2) Includes an aggregate of $50.7 million of nonaccrual loans which were current in regards to contractual principal and interest payments.
[3] | Included within each of commercial, financial and agricultural loans and commercial real estate loans is an immaterial amount of consumer loans that are not broken out by class.

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