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Loans (Composition Of Loan Portfolio By Class Of Loan) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |  |
Impaired Financing Receivable, Recorded Investment |  | $ 69,224 | $ 76,231 | $ 69,224 | $ 76,231 | $ 73,712
Loan balance |  | 4,999,912 |  | 4,999,912 |  | 4,829,682
Accrued interest receivable |  | 18,976 |  | 18,976 |  | 17,677
Recorded Investment |  | 5,014,564 |  | 5,014,564 |  | 4,843,311
Impaired Financing Receivable, Average Recorded Investment |  | 69,933 | 89,455 | 69,541 | 98,690 |
Impaired Financing Receivable, Interest Income, Cash Basis Method |  | 409 | 664 | 1,513 | 2,081 |
Commercial Financial And Agricultural [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |  |
Impaired Financing Receivable, Recorded Investment |  | 19,154 | 23,186 | 19,154 | 23,186 |
Impaired Financing Receivable, Average Recorded Investment |  | 19,793 | 18,764 | 19,056 | 19,362 |
Impaired Financing Receivable, Interest Income, Cash Basis Method |  | 35 | 68 | 306 | 204 |
Construction Real Estate, SEPH Commercial Land and Development [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |  |
Impaired Financing Receivable, Recorded Investment |  | 2,045 | 2,097 | 2,045 | 2,097 |
Loan balance | [1] | 2,069 |  | 2,069 |  | 2,195
Accrued interest receivable | [1] | 0 |  | 0 |  | 0
Recorded Investment | [1] | 2,069 |  | 2,069 |  | 2,195
Impaired Financing Receivable, Average Recorded Investment |  | 2,068 | 3,653 | 2,073 | 4,130 |
Impaired Financing Receivable, Interest Income, Cash Basis Method |  | 0 | 12 | 8 | 134 |
Construction Real Estate - Remaining Commercial [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |  |
Impaired Financing Receivable, Recorded Investment |  | 5,993 | 5,970 | 5,993 | 5,970 |
Loan balance |  | 115,987 |  | 115,987 |  | 115,139
Accrued interest receivable |  | 279 |  | 279 |  | 300
Recorded Investment |  | 116,266 |  | 116,266 |  | 115,439
Impaired Financing Receivable, Average Recorded Investment |  | 6,059 | 8,561 | 5,771 | 9,587 |
Impaired Financing Receivable, Interest Income, Cash Basis Method |  | 2 | 2 | 13 | 56 |
Construction Real Estate - Mortgage [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |  |
Loan balance |  | 35,554 |  | 35,554 |  | 31,148
Accrued interest receivable |  | 78 |  | 78 |  | 72
Recorded Investment |  | 35,632 |  | 35,632 |  | 31,220
Construction Real Estate - Installment [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |  |
Loan balance |  | 6,762 |  | 6,762 |  | 7,322
Accrued interest receivable |  | 19 |  | 19 |  | 23
Recorded Investment |  | 6,781 |  | 6,781 |  | 7,345
Residential Real Estate - Commercial [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |  |
Impaired Financing Receivable, Recorded Investment |  | 24,370 | 23,640 | 24,370 | 23,640 |
Loan balance |  | 412,294 |  | 412,294 |  | 417,612
Accrued interest receivable |  | 883 |  | 883 |  | 1,038
Recorded Investment |  | 413,177 |  | 413,177 |  | 418,650
Impaired Financing Receivable, Average Recorded Investment |  | 24,560 | 27,765 | 24,784 | 29,632 |
Impaired Financing Receivable, Interest Income, Cash Basis Method |  | 240 | 255 | 768 | 825 |
Residential Real Estate - Mortgage [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |  |
Loan balance |  | 1,216,221 |  | 1,216,221 |  | 1,189,709
Accrued interest receivable |  | 1,840 |  | 1,840 |  | 1,548
Recorded Investment |  | 1,218,061 |  | 1,218,061 |  | 1,191,257
Residential Real Estate - HELOC [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |  |
Loan balance |  | 213,488 |  | 213,488 |  | 216,915
Accrued interest receivable |  | 755 |  | 755 |  | 803
Recorded Investment |  | 214,243 |  | 214,243 |  | 217,718
Residential Real Estate - Installment [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |  |
Loan balance |  | 24,297 |  | 24,297 |  | 27,139
Accrued interest receivable |  | 79 |  | 79 |  | 97
Recorded Investment |  | 24,376 |  | 24,376 |  | 27,236
Loans Receivable [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |  |
Accrued interest receivable |  | 14,652 |  | 14,652 |  | 13,629
Commercial Financial And Agricultural [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |  |
Loan balance | [1] | 909,025 |  | 909,025 |  | 856,535
Accrued interest receivable | [1] | 3,478 |  | 3,478 |  | 3,218
Recorded Investment | [1] | 912,503 |  | 912,503 |  | 859,753
Commercial Real Estate [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |  |
Impaired Financing Receivable, Recorded Investment |  | 17,662 | 21,303 | 17,662 | 21,303 |
Loan balance | [1] | 1,091,578 |  | 1,091,578 |  | 1,069,637
Accrued interest receivable | [1] | 4,239 |  | 4,239 |  | 3,546
Recorded Investment | [1] | 1,095,817 |  | 1,095,817 |  | 1,073,183
Impaired Financing Receivable, Average Recorded Investment |  | 17,453 | 30,644 | 17,857 | 35,458 |
Impaired Financing Receivable, Interest Income, Cash Basis Method |  | 132 | 327 | 418 | 862 |
Consumer [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |  |
Impaired Financing Receivable, Recorded Investment |  |  | 35 |  | 35 |
Loan balance |  | 969,586 |  | 969,586 |  | 893,160
Accrued interest receivable |  | 2,949 |  | 2,949 |  | 2,967
Recorded Investment |  | 972,535 |  | 972,535 |  | 896,127
Impaired Financing Receivable, Average Recorded Investment |  |  | 68 |  | 521 |
Impaired Financing Receivable, Interest Income, Cash Basis Method |  | 0 | $ 0 | 0 | $ 0 |
Leases [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |  |
Loan balance |  | 3,051 |  | 3,051 |  | 3,171
Accrued interest receivable |  | 53 |  | 53 |  | 17
Recorded Investment |  | $ 3,104 |  | $ 3,104 |  | $ 3,188
[1] | Included within 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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