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Loans - Schedule of recorded investment in nonaccrual restructured and loans 90 days past due and accruing (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | $ 90,080 | $ 67,954
Restructured Loans | 21,298 | 15,222
Financing Receivable, 90 Days or More Past Due, Still Accruing | 2,737 | 2,302
Financing Receivable Recorded Investment Nonperforming | 114,115 | 85,478
Commercial Financial And Agricultural [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | 26,776 | 14,998
Restructured Loans | 6,349 | 196
Financing Receivable, 90 Days or More Past Due, Still Accruing | 28 | 10
Financing Receivable Recorded Investment Nonperforming | 33,153 | 15,204
Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | 39,711 | 25,566
Restructured Loans | 2,080 | 2,860
Financing Receivable, 90 Days or More Past Due, Still Accruing | 625 | 0
Financing Receivable Recorded Investment Nonperforming | 42,416 | 28,426
Construction Real Estate Remaining Commercial [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | 453 | 1,866
Restructured Loans | 0 | 0
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Financing Receivable Recorded Investment Nonperforming | 453 | 1,866
Construction Real Estate Mortgage [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | 25 | 0
Restructured Loans | 84 | 15
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 20
Financing Receivable Recorded Investment Nonperforming | 109 | 35
Construction Real Estate Installment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | 72 | 19
Restructured Loans | 5 | 9
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Financing Receivable Recorded Investment Nonperforming | 77 | 28
Residential Real Estate Commercial [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | 2,025 | 2,610
Restructured Loans | 0 | 122
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Financing Receivable Recorded Investment Nonperforming | 2,025 | 2,732
Residential Real Estate Mortgage [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | 15,271 | 16,892
Restructured Loans | 8,826 | 9,100
Financing Receivable, 90 Days or More Past Due, Still Accruing | 1,209 | 1,124
Financing Receivable Recorded Investment Nonperforming | 25,306 | 27,116
Residential Real Estate Home Equity Line Of Credit [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | 2,062 | 2,158
Restructured Loans | 1,010 | 1,028
Financing Receivable, 90 Days or More Past Due, Still Accruing | 44 | 9
Financing Receivable Recorded Investment Nonperforming | 3,116 | 3,195
Residential Real Estate Installment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | 462 | 468
Restructured Loans | 1,964 | 1,049
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 24
Financing Receivable Recorded Investment Nonperforming | 2,426 | 1,541
Consumer Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | 3,089 | 3,377
Restructured Loans | 980 | 843
Financing Receivable, 90 Days or More Past Due, Still Accruing | 645 | 1,115
Financing Receivable Recorded Investment Nonperforming | 4,714 | 5,335
Leases |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | 134 | 0
Restructured Loans | 0 | 0
Financing Receivable, 90 Days or More Past Due, Still Accruing | 186 | 0
Financing Receivable Recorded Investment Nonperforming | $ 320 | $ 0

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- Definition Reflects the recorded investment in nonaccrual loans, renegotiated loans not currently on nonaccrual, and loans which are contractually past due 90 days or more but whose interest continues to accrue. + References No definition available. + Details
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- Definition Amount of financing receivable 90 days or more past due and still accruing. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 16 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919258-210447 Reference 2: 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=118936363&loc=d3e5111-111524 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI http://asc.fasb.org/extlink&oid=118955255&loc=SL82922355-210448 + Details
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