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Loans (Aging Of Recorded Investment In Past Due Loans) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Accruing loans past due 30-89 days |  | $ 20,109 |  |  | $ 25,241 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 27,626 | [1] |  | 17,776 | [2]
Total loans past due |  | 47,735 |  |  | 43,017 |
Total current |  | 5,260,240 |  |  | 5,346,125 |
Recorded Investment |  | 5,307,975 |  |  | 5,389,142 |
Loans past due 90 days or more and accruing |  | 1,406 |  |  | 1,845 |
Impaired Financing Receivable, Recorded Investment, Nonaccrual loans which are current in regards to contractual P&I payments |  | 39,900 |  |  | 56,100 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 1,835 |  | $ 8,085 |  |
Construction Real Estate Commercial [Domain] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Accruing loans past due 30-89 days |  |  |  |  | 29 |
Total loans past due |  |  |  |  | 29 |
Total current |  | 126,936 |  |  | 125,761 |
Recorded Investment |  | 126,936 |  |  | 125,790 |
Loans past due 90 days or more and accruing |  | 0 |  |  | 0 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 63 |  |  |  |
Commercial Financial And Agricultural [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 1,483 |  |  | 145 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 13,100 | [1] |  | 1,043 | [2]
Total loans past due |  | 14,583 |  |  | 1,188 |
Total current |  | 990,446 |  |  | 1,056,678 |
Loans past due 90 days or more and accruing |  | 0 |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 55 |  | 4,098 |  |
Construction Real Estate - Mortgage [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 84 |  |  | 256 |
Total loans past due |  | 84 |  |  | 256 |
Total current |  | 51,414 |  |  | 52,080 |
Recorded Investment |  | 51,498 |  |  | 52,336 |
Loans past due 90 days or more and accruing |  | 0 |  |  | 0 |
Construction Real Estate - Installment [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 49 |  |  | 54 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 3 | [1] |  | 19 | [2]
Total loans past due |  | 52 |  |  | 73 |
Total current |  | 3,203 |  |  | 3,818 |
Recorded Investment |  | 3,255 |  |  | 3,891 |
Loans past due 90 days or more and accruing |  | 0 |  |  | 0 |
Residential Real Estate - Commercial [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 413 |  |  | 16 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 1,023 | [1] |  | 1,586 | [2]
Total loans past due |  | 1,436 |  |  | 1,602 |
Total current |  | 389,373 |  |  | 392,521 |
Recorded Investment |  | 390,809 |  |  | 394,123 |
Loans past due 90 days or more and accruing |  | 0 |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  |  |  | 2,140 |  |
Residential Real Estate - Mortgage [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 9,465 |  |  | 11,515 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 8,010 | [1] |  | 9,232 | [2]
Total loans past due |  | 17,475 |  |  | 20,747 |
Total current |  | 1,081,018 |  |  | 1,091,195 |
Recorded Investment |  | 1,098,493 |  |  | 1,111,942 |
Loans past due 90 days or more and accruing |  | 669 |  |  | 568 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 650 |  | 608 |  |
Residential Real Estate - HELOC [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 570 |  |  | 616 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 729 | [1] |  | 876 | [2]
Total loans past due |  | 1,299 |  |  | 1,492 |
Total current |  | 193,763 |  |  | 202,660 |
Recorded Investment |  | 195,062 |  |  | 204,152 |
Loans past due 90 days or more and accruing |  | 47 |  |  | 14 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 339 |  | 206 |  |
Residential Real Estate - Installment [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 268 |  |  | 239 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 215 | [1] |  | 253 | [2]
Total loans past due |  | 483 |  |  | 492 |
Total current |  | 17,136 |  |  | 18,087 |
Recorded Investment |  | 17,619 |  |  | 18,579 |
Loans past due 90 days or more and accruing |  | 0 |  |  | 7 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 115 |  | 34 |  |
Commercial Financial And Agricultural [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Recorded Investment | [3] | 1,005,029 |  |  | 1,057,866 |
Commercial Real Estate [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 210 |  |  | 856 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 2,748 | [1] |  | 2,360 | [2]
Total loans past due |  | 2,958 |  |  | 3,216 |
Total current |  | 1,157,652 |  |  | 1,168,674 |
Recorded Investment | [3] | 1,160,610 |  |  | 1,171,890 |
Loans past due 90 days or more and accruing |  | 0 |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 249 |  | 379 |  |
Consumer [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 7,567 |  |  | 11,515 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 1,798 | [1] |  | 2,407 | [2]
Total loans past due |  | 9,365 |  |  | 13,922 |
Total current |  | 1,246,348 |  |  | 1,231,622 |
Recorded Investment |  | 1,255,713 |  |  | 1,245,544 |
Loans past due 90 days or more and accruing |  | 690 |  |  | 1,256 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 364 |  | 620 |  |
Leases [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 0 |  |  | 0 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 0 | [1] |  | 0 | [2]
Total loans past due |  | 0 |  |  | 0 |
Total current |  | 2,951 |  |  | 3,029 |
Recorded Investment |  | 2,951 |  |  | $ 3,029 |
Accruing Financing Receivable Modifications [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 429 |  | 3,585 |  |
Accruing Financing Receivable Modifications [Member] | Construction Real Estate Commercial [Domain] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 63 |  |  |  |
Accruing Financing Receivable Modifications [Member] | Commercial Financial And Agricultural [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  |  |  | 3,079 |  |
Accruing Financing Receivable Modifications [Member] | Construction Real Estate - Mortgage [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 0 |  | 0 |  |
Accruing Financing Receivable Modifications [Member] | Construction Real Estate - Installment [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, 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, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 0 |  | 0 |  |
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - HELOC [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 251 |  | 200 |  |
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - Installment [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 102 |  | 34 |  |
Accruing Financing Receivable Modifications [Member] | Consumer [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 13 |  | 272 |  |
Nonaccruing Financing Receivable Modifications [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 1,406 |  | 4,500 |  |
Nonaccruing Financing Receivable Modifications [Member] | Commercial Financial And Agricultural [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 55 |  | 1,019 |  |
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Commercial [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  |  |  | 2,140 |  |
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Mortgage [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 650 |  | 608 |  |
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - HELOC [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 88 |  | 6 |  |
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Installment [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 13 |  |  |  |
Nonaccruing Financing Receivable Modifications [Member] | Commercial Real Estate [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 249 |  | 379 |  |
Nonaccruing Financing Receivable Modifications [Member] | Consumer [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | $ 351 |  | $ 348 |  |
[1] | 1) Includes $1.4 million of loans past due 90 days or more and accruing. The remaining loans were past due nonaccrual loans.(2) Includes $39.9 million of nonaccrual loans which were current in regards to contractual principal and interest payments
[2] | 1) Includes $1.8 million of loans past due 90 days or more and accruing. The remaining loans were past due nonaccrual loans.(2) Includes $56.1 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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