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Loans (Average Recorded Investment And Interest Income Recognized On Loans Individually Evaluated For Impairment) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
Financing Receivable, Impaired [Line Items] |  |  |
Recorded investment | $ 50,322 | $ 70,127 | $ 56,564
Average recorded investment | 50,863 | 67,950 |
Interest income recognized | 421 | 811 |
Commercial Financial And Agricultural [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded investment | 27,050 | 22,542 |
Average recorded investment | 20,078 | 19,471 |
Interest income recognized | 174 | 220 |
Construction Real Estate Commercial [Domain] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded investment | 1,393 | 2,041 |
Average recorded investment | 1,377 | 2,096 |
Interest income recognized | 14 | 15 |
Residential Real Estate - Commercial [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded investment | 2,896 | 22,803 |
Average recorded investment | 11,215 | 23,081 |
Interest income recognized | 31 | 345 |
Commercial Real Estate [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded investment | 18,983 | 22,732 |
Average recorded investment | 18,193 | 23,297 |
Interest income recognized | $ 202 | 231 |
Consumer [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded investment |  | 9 |
Average recorded investment |  | $ 5 |

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- Definition Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5258-111524 + Details
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