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Loans (Aging Of Recorded Investment In Past Due Loans) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | $ 19,254 |  |  | $ 19,254 |  |  | $ 29,919 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 27,582 | [1] |  | 27,582 | [1] |  | 19,602 | [2]
Total loans past due |  | 46,836 |  |  | 46,836 |  |  | 49,521 |
Total current |  | 6,350,847 |  |  | 6,350,847 |  |  | 5,660,277 |
Recorded Investment |  | 6,397,683 |  |  | 6,397,683 |  |  | 5,709,798 |
Loans past due 90 days or more and accruing |  | 2,471 |  |  | 2,471 |  |  | 2,302 |
Impaired Financing Receivable, Recorded Investment, Nonaccrual loans which are current in regards to contractual P&I payments |  | 41,600 |  |  | 41,600 |  |  | 50,700 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 5,244 |  | $ 2,374 | 9,182 |  | $ 3,767 |  |
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 |  | 1,748 | [1] |  | 1,748 | [1] |  | 1,635 | [2]
Total loans past due |  | 1,748 |  |  | 1,748 |  |  | 1,635 |
Total current |  | 221,626 |  |  | 221,626 |  |  | 174,466 |
Recorded Investment |  | 223,374 |  |  | 223,374 |  |  | 176,101 |
Loans past due 90 days or more and accruing |  | 224 |  |  | 224 |  |  | 0 |
Financing Receivable, Modifications, Recorded Investment, During Period |  |  |  |  | 456 |  | 0 |  |
Commercial Financial And Agricultural [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 402 |  |  | 402 |  |  | 4,786 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 10,672 | [1] |  | 10,672 | [1] |  | 1,375 | [2]
Total loans past due |  | 11,074 |  |  | 11,074 |  |  | 6,161 |
Total current |  | 1,153,378 |  |  | 1,153,378 |  |  | 1,071,228 |
Loans past due 90 days or more and accruing |  | 25 |  |  | 25 |  |  | 10 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 2,444 |  | 149 | 2,900 |  | 193 |  |
Construction Real Estate - Mortgage [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 114 |  |  | 114 |  |  | 133 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 301 | [1] |  | 301 | [1] |  | 20 | [2]
Total loans past due |  | 415 |  |  | 415 |  |  | 153 |
Total current |  | 89,292 |  |  | 89,292 |  |  | 70,539 |
Recorded Investment |  | 89,707 |  |  | 89,707 |  |  | 70,692 |
Loans past due 90 days or more and accruing |  | 0 |  |  | 0 |  |  | 20 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 71 |  |  | 71 |  | 0 |  |
Construction Real Estate - Installment [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 29 |  |  | 29 |  |  | 28 |
Past due nonaccrual loans and loans past due 90 days or more and accruing | [2] |  |  |  |  |  |  | 19 |
Total loans past due |  | 29 |  |  | 29 |  |  | 47 |
Total current |  | 1,963 |  |  | 1,963 |  |  | 2,393 |
Recorded Investment |  | 1,992 |  |  | 1,992 |  |  | 2,440 |
Loans past due 90 days or more and accruing |  | 0 |  |  | 0 |  |  | 0 |
Financing Receivable, Modifications, Recorded Investment, During Period |  |  |  | 14 | 0 |  | 14 |  |
Residential Real Estate Commercial [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 39 |  |  | 39 |  |  | 683 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 811 | [1] |  | 811 | [1] |  | 1,104 | [2]
Total loans past due |  | 850 |  |  | 850 |  |  | 1,787 |
Total current |  | 477,495 |  |  | 477,495 |  |  | 429,093 |
Recorded Investment |  | 478,345 |  |  | 478,345 |  |  | 430,880 |
Loans past due 90 days or more and accruing |  | 0 |  |  | 0 |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 36 |  |  | 36 |  | 0 |  |
Residential Real Estate - Mortgage [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 9,322 |  |  | 9,322 |  |  | 13,210 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 9,574 | [1] |  | 9,574 | [1] |  | 8,553 | [2]
Total loans past due |  | 18,896 |  |  | 18,896 |  |  | 21,763 |
Total current |  | 1,150,805 |  |  | 1,150,805 |  |  | 1,113,742 |
Recorded Investment |  | 1,169,701 |  |  | 1,169,701 |  |  | 1,135,505 |
Loans past due 90 days or more and accruing |  | 1,061 |  |  | 1,061 |  |  | 1,124 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 374 |  | 317 | 673 |  | 961 |  |
Residential Real Estate - HELOC [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 235 |  |  | 235 |  |  | 620 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 843 | [1] |  | 843 | [1] |  | 907 | [2]
Total loans past due |  | 1,078 |  |  | 1,078 |  |  | 1,527 |
Total current |  | 239,263 |  |  | 239,263 |  |  | 214,915 |
Recorded Investment |  | 240,341 |  |  | 240,341 |  |  | 216,442 |
Loans past due 90 days or more and accruing |  | 55 |  |  | 55 |  |  | 9 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 166 |  | 452 | 236 |  | 791 |  |
Residential Real Estate - Installment [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 82 |  |  | 82 |  |  | 155 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 337 | [1] |  | 337 | [1] |  | 274 | [2]
Total loans past due |  | 419 |  |  | 419 |  |  | 429 |
Total current |  | 13,004 |  |  | 13,004 |  |  | 13,934 |
Recorded Investment |  | 13,423 |  |  | 13,423 |  |  | 14,363 |
Loans past due 90 days or more and accruing |  | 0 |  |  | 0 |  |  | 24 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 410 |  | 75 | 596 |  | 121 |  |
Commercial Financial And Agricultural [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Recorded Investment | [3] | 1,164,452 |  |  | 1,164,452 |  |  | 1,077,389 |
Commercial Real Estate [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 3,026 |  |  | 3,026 |  |  | 780 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 1,565 | [1] |  | 1,565 | [1] |  | 3,584 | [2]
Total loans past due |  | 4,591 |  |  | 4,591 |  |  | 4,364 |
Total current |  | 1,613,361 |  |  | 1,613,361 |  |  | 1,283,431 |
Recorded Investment | [3] | 1,617,952 |  |  | 1,617,952 |  |  | 1,287,795 |
Loans past due 90 days or more and accruing |  | 606 |  |  | 606 |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 780 |  | 589 | 2,995 |  | 720 |  |
Consumer [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 6,005 |  |  | 6,005 |  |  | 9,524 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 1,731 | [1] |  | 1,731 | [1] |  | 2,131 | [2]
Total loans past due |  | 7,736 |  |  | 7,736 |  |  | 11,655 |
Total current |  | 1,359,588 |  |  | 1,359,588 |  |  | 1,284,237 |
Recorded Investment |  | 1,367,324 |  |  | 1,367,324 |  |  | 1,295,892 |
Loans past due 90 days or more and accruing |  | 500 |  |  | 500 |  |  | 1,115 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 963 |  | 778 | 1,219 |  | 967 |  |
Finance Leases Portfolio Segment [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 0 |  |  | 0 |  |  | 0 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 0 | [1] |  | 0 | [1] |  | 0 | [2]
Total loans past due |  | 0 |  |  | 0 |  |  | 0 |
Total current |  | 31,072 |  |  | 31,072 |  |  | 2,299 |
Recorded Investment |  | 31,072 |  |  | 31,072 |  |  | 2,299 |
Loans past due 90 days or more and accruing |  | 0 |  |  | 0 |  |  | $ 0 |
Accruing Financing Receivable Modifications [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 2,397 |  | 1,223 | 3,092 |  | 1,511 |  |
Accruing Financing Receivable Modifications [Member] | Construction Real Estate Commercial [Domain] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  |  |  |  | 456 |  | 0 |  |
Accruing Financing Receivable Modifications [Member] | Commercial Financial And Agricultural [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 1,802 |  | 123 | 1,801 |  | 123 |  |
Accruing Financing Receivable Modifications [Member] | Construction Real Estate - Mortgage [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 71 |  | 0 | 71 |  | 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 |  | 14 | 0 |  | 14 |  |
Accruing Financing Receivable Modifications [Member] | Residential Real Estate Commercial [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  |  |  |  | 0 |  | 0 |  |
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - Mortgage [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 0 |  | 93 | 54 |  | 93 |  |
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - HELOC [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 99 |  | 409 | 100 |  | 661 |  |
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - Installment [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 365 |  | 71 | 550 |  | 104 |  |
Accruing Financing Receivable Modifications [Member] | Commercial Real Estate [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  |  |  | 455 | 0 |  | 455 |  |
Accruing Financing Receivable Modifications [Member] | Consumer [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 60 |  | 58 | 60 |  | 61 |  |
Nonaccruing Financing Receivable Modifications [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 2,847 |  | 1,151 | 6,090 |  | 2,256 |  |
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 |  | 642 |  | 26 | 1,099 |  | 70 |  |
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 |  | 36 |  |  | 36 |  | 0 |  |
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Mortgage [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 374 |  | 224 | 619 |  | 868 |  |
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - HELOC [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 67 |  | 43 | 136 |  | 130 |  |
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Installment [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 45 |  | 4 | 46 |  | 17 |  |
Nonaccruing Financing Receivable Modifications [Member] | Commercial Real Estate [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 780 |  | 134 | 2,995 |  | 265 |  |
Nonaccruing Financing Receivable Modifications [Member] | Consumer [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | $ 903 |  | $ 720 | $ 1,159 |  | $ 906 |  |
[1] | 1) Includes an aggregate of $2.5 million of loans past due 90 days or more and accruing. The remaining loans were past due nonaccrual loans.(2) Includes an aggregate of $41.6 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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