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Loans Aging of recorded investment in past due loans (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Recorded Investment, Accruing Loans 30 to 89 Days Past Due | $ 21,749 | $ 29,919
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans | 26,535 | 19,602
Financing Receivable, Recorded Investment, Past Due | 48,284 | 49,521
Financing Receivable, Not Past Due | 6,472,341 | 5,660,277
Loans and Leases Receivable, Recorded Investment | 6,520,625 | 5,709,798
Financing Receivable, 90 Days or More Past Due, Still Accruing | 2,737 | 2,302
financing receivable non accrual current | 66,300 | 50,700
Commercial Financial And Agricultural [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Recorded Investment, Accruing Loans 30 to 89 Days Past Due | 582 | 4,786
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans | 12,407 | 1,375
Financing Receivable, Recorded Investment, Past Due | 12,989 | 6,161
Financing Receivable, Not Past Due | 1,176,514 | 1,071,228
Loans and Leases Receivable, Recorded Investment | 1,189,503 | 1,077,389
Financing Receivable, 90 Days or More Past Due, Still Accruing | 28 | 10
Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Recorded Investment, Accruing Loans 30 to 89 Days Past Due | 160 | 780
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans | 1,143 | 3,584
Financing Receivable, Recorded Investment, Past Due | 1,303 | 4,364
Financing Receivable, Not Past Due | 1,613,681 | 1,283,431
Loans and Leases Receivable, Recorded Investment | 1,614,984 | 1,287,795
Financing Receivable, 90 Days or More Past Due, Still Accruing | 625 | 0
Construction Real Estate Remaining Commercial [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans |  | 1,635
Financing Receivable, Recorded Investment, Past Due |  | 1,635
Financing Receivable, Not Past Due | 234,463 | 174,466
Loans and Leases Receivable, Recorded Investment | 234,463 | 176,101
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Construction Real Estate Mortgage [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Recorded Investment, Accruing Loans 30 to 89 Days Past Due | 397 | 133
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans |  | 20
Financing Receivable, Recorded Investment, Past Due | 397 | 153
Financing Receivable, Not Past Due | 96,405 | 70,539
Loans and Leases Receivable, Recorded Investment | 96,802 | 70,692
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 20
Construction Real Estate Installment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Recorded Investment, Accruing Loans 30 to 89 Days Past Due | 24 | 28
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans |  | 19
Financing Receivable, Recorded Investment, Past Due | 24 | 47
Financing Receivable, Not Past Due | 1,468 | 2,393
Loans and Leases Receivable, Recorded Investment | 1,492 | 2,440
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Residential Real Estate Commercial [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Recorded Investment, Accruing Loans 30 to 89 Days Past Due |  | 683
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans | 908 | 1,104
Financing Receivable, Recorded Investment, Past Due | 908 | 1,787
Financing Receivable, Not Past Due | 479,512 | 429,093
Loans and Leases Receivable, Recorded Investment | 480,420 | 430,880
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Residential Real Estate Mortgage [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Recorded Investment, Accruing Loans 30 to 89 Days Past Due | 12,841 | 13,210
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans | 9,153 | 8,553
Financing Receivable, Recorded Investment, Past Due | 21,994 | 21,763
Financing Receivable, Not Past Due | 1,155,703 | 1,113,742
Loans and Leases Receivable, Recorded Investment | 1,177,697 | 1,135,505
Financing Receivable, 90 Days or More Past Due, Still Accruing | 1,209 | 1,124
Residential Real Estate Home Equity Line Of Credit [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Recorded Investment, Accruing Loans 30 to 89 Days Past Due | 652 | 620
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans | 779 | 907
Financing Receivable, Recorded Investment, Past Due | 1,431 | 1,527
Financing Receivable, Not Past Due | 224,448 | 214,915
Loans and Leases Receivable, Recorded Investment | 225,879 | 216,442
Financing Receivable, 90 Days or More Past Due, Still Accruing | 44 | 9
Residential Real Estate Installment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Recorded Investment, Accruing Loans 30 to 89 Days Past Due | 164 | 155
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans | 338 | 274
Financing Receivable, Recorded Investment, Past Due | 502 | 429
Financing Receivable, Not Past Due | 12,093 | 13,934
Loans and Leases Receivable, Recorded Investment | 12,595 | 14,363
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 24
Consumer Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Recorded Investment, Accruing Loans 30 to 89 Days Past Due | 6,561 | 9,524
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans | 1,621 | 2,131
Financing Receivable, Recorded Investment, Past Due | 8,182 | 11,655
Financing Receivable, Not Past Due | 1,448,507 | 1,284,237
Loans and Leases Receivable, Recorded Investment | 1,456,689 | 1,295,892
Financing Receivable, 90 Days or More Past Due, Still Accruing | 645 | 1,115
Leases |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Recorded Investment, Accruing Loans 30 to 89 Days Past Due | 368 |
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans | 186 |
Financing Receivable, Recorded Investment, Past Due | 554 |
Financing Receivable, Not Past Due | 29,547 | 2,299
Loans and Leases Receivable, Recorded Investment | 30,101 | 2,299
Financing Receivable, 90 Days or More Past Due, Still Accruing | $ 186 | $ 0

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