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Loans - Recorded Investment in Nonaccrual, Restructured and Loans Past Due 90 Days or More and Accruing (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment | $ 48,144 | $ 56,564 | $ 70,426
Nonaccrual Loans | 67,954 | 72,056 |
Accruing TDRs | 15,222 | 20,177 |
Loans Past Due 90 Days or More and Accruing | 2,302 | 1,845 |
Total Nonperforming Loans | 85,478 | 94,078 |
Impaired Financing Receivable, Average Recorded Investment | 51,041 | 67,070 | 79,496
Impaired Financing Receivable, Interest Income, Cash Basis Method | 1,890 | 2,708 | 4,777
Commercial, financial and agricultural |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment | 15,120 | 18,039 | 20,624
Nonaccrual Loans | 14,998 | 16,773 |
Accruing TDRs | 196 | 1,291 |
Loans Past Due 90 Days or More and Accruing | 10 | 0 |
Total Nonperforming Loans | 15,204 | 18,064 |
Impaired Financing Receivable, Average Recorded Investment | 21,000 | 23,154 | 26,821
Impaired Financing Receivable, Interest Income, Cash Basis Method | 695 | 963 | 885
Commercial real estate |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment | 28,426 | 18,142 | 24,474
Nonaccrual Loans | 25,566 | 12,979 |
Accruing TDRs | 2,860 | 5,163 |
Loans Past Due 90 Days or More and Accruing | 0 | 0 |
Total Nonperforming Loans | 28,426 | 18,142 |
Impaired Financing Receivable, Average Recorded Investment | 23,024 | 21,692 | 22,828
Impaired Financing Receivable, Interest Income, Cash Basis Method | 1,047 | 903 | 884
Commercial |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment | 1,866 | 1,324 | 2,226
Nonaccrual Loans | 1,866 | 986 |
Accruing TDRs | 0 | 338 |
Loans Past Due 90 Days or More and Accruing | 0 | 0 |
Total Nonperforming Loans | 1,866 | 1,324 |
Impaired Financing Receivable, Average Recorded Investment | 1,709 | 1,729 | 5,503
Impaired Financing Receivable, Interest Income, Cash Basis Method | 34 | 64 | 66
Mortgage |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Nonaccrual Loans | 0 | 8 |
Accruing TDRs | 15 | 92 |
Loans Past Due 90 Days or More and Accruing | 20 | 0 |
Total Nonperforming Loans | 35 | 100 |
Installment |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Nonaccrual Loans | 19 | 52 |
Accruing TDRs | 9 | 0 |
Loans Past Due 90 Days or More and Accruing | 0 | 0 |
Total Nonperforming Loans | 28 | 52 |
Commercial |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment | 2,732 | 19,059 | 23,102
Nonaccrual Loans | 2,610 | 18,835 |
Accruing TDRs | 122 | 224 |
Loans Past Due 90 Days or More and Accruing | 0 | 0 |
Total Nonperforming Loans | 2,732 | 19,059 |
Impaired Financing Receivable, Average Recorded Investment | 5,308 | 20,490 | 24,341
Impaired Financing Receivable, Interest Income, Cash Basis Method | 114 | 778 | 2,942
Mortgage |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Nonaccrual Loans | 16,892 | 16,841 |
Accruing TDRs | 9,100 | 10,766 |
Loans Past Due 90 Days or More and Accruing | 1,124 | 568 |
Total Nonperforming Loans | 27,116 | 28,175 |
HELOC |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Nonaccrual Loans | 2,158 | 1,593 |
Accruing TDRs | 1,028 | 1,025 |
Loans Past Due 90 Days or More and Accruing | 9 | 14 |
Total Nonperforming Loans | 3,195 | 2,632 |
Installment |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Nonaccrual Loans | 468 | 586 |
Accruing TDRs | 1,049 | 616 |
Loans Past Due 90 Days or More and Accruing | 24 | 7 |
Total Nonperforming Loans | 1,541 | 1,209 |
Consumer |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Nonaccrual Loans | 3,377 | 3,403 |
Accruing TDRs | 843 | 662 |
Loans Past Due 90 Days or More and Accruing | 1,115 | 1,256 |
Total Nonperforming Loans | $ 5,335 | 5,321 |
Impaired Financing Receivable, Average Recorded Investment |  | $ 5 | $ 3

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- Definition Recorded investment in financing receivables that are 90 days or more past due and still accruing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524 + Details
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