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Loans Schedule of loans individually evaluated for impairment by class of loan (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Related Allowance | $ 5,230 | $ 2,273 |
Recorded investment, related to loans | 12,700 | 14,000 |
Impaired Financing Receivable, Unpaid Principal Balance | 78,178 | 59,381 |
Impaired Financing Receivable, Recorded Investment | 77,491 | 48,144 | $ 56,564
Partial charge-offs on impaired loans | 719 | 11,246 |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 5,230 | 2,273 |
Financing Receivable With No Related Allowance Recorded [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Partial charge-offs on impaired loans | 500 | 8,800 |
Financing Receivable With Related Allowance Recorded [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Partial charge-offs on impaired loans | 200 | 2,400 |
Commercial Financial And Agricultural [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 21,194 | 8,999 |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 21,010 | 3,713 |
Impaired Financing Receivable, Related Allowance | 5,104 | 2,169 |
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 12,289 | 13,736 |
Recorded investment, related to loans | 12,078 | 11,407 |
Impaired Financing Receivable, Recorded Investment | 33,088 | 15,120 | 18,039
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 5,104 | 2,169 |
Commercial Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 41,696 | 26,663 |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 41,471 | 26,213 |
Impaired Financing Receivable, Related Allowance | 35 | 86 |
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 320 | 2,255 |
Recorded investment, related to loans | 320 | 2,213 |
Impaired Financing Receivable, Recorded Investment | 41,791 | 28,426 | 18,142
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 35 | 86 |
Construction Real Estate Remaining Commercial [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 453 | 4,679 |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 453 | 1,866 |
Impaired Financing Receivable, Recorded Investment | 453 | 1,866 | 1,324
Residential Real Estate Commercial [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 1,921 | 2,691 |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 1,854 | 2,374 |
Impaired Financing Receivable, Related Allowance | 42 | 18 |
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 171 | 358 |
Recorded investment, related to loans | 171 | 358 |
Impaired Financing Receivable, Recorded Investment | 2,025 | 2,732 | $ 19,059
Leases |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Related Allowance | 49 |  |
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 134 |  |
Recorded investment, related to loans | 134 |  |
Impaired Financing Receivable, Recorded Investment | 134 |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | $ 49 | $ 0 |

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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 + Details
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