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Loans - Impaired Loans (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Impaired loans |  |
Impaired loans, troubled debt restructurings | $ 4,350 | $ 5,450
Impaired loans, Unpaid Principal Balance | 5,511 | 5,928
Impaired loans, Recorded Investment in Loans without Specific Reserve | 2,227 | 2,842
Impaired loans, Recorded Investment in Loans with Specific Reserve | 3,047 | 2,935
Impaired loans, Related Allowance | 267 | 428
Impaired loans, Average Balance | 5,242 | 6,099
Impaired loans, Interest Income Recognized | 239 | 276
Real estate - residential mortgage |  |
Impaired loans |  |
Impaired loans, Unpaid Principal Balance | 3,891 | 3,057
Impaired loans, Recorded Investment in Loans without Specific Reserve | 2,192 | 1,288
Impaired loans, Recorded Investment in Loans with Specific Reserve | 1,479 | 1,677
Impaired loans, Related Allowance | 72 | 92
Impaired loans, Average Balance | 3,506 | 3,056
Impaired loans, Interest Income Recognized | 155 | 142
Commercial, financial and agricultural | Commercial real estate lending |  |
Impaired loans |  |
Impaired loans, Unpaid Principal Balance | 1,459 | 2,468
Impaired loans, Recorded Investment in Loans without Specific Reserve | 4 | 1,498
Impaired loans, Recorded Investment in Loans with Specific Reserve | 1,447 | 927
Impaired loans, Related Allowance | 77 | 10
Impaired loans, Average Balance | 1,581 | 2,653
Impaired loans, Interest Income Recognized | 82 | 132
Commercial, financial and agricultural | Commercial business lending |  |
Impaired loans |  |
Impaired loans, Unpaid Principal Balance |  | 33
Impaired loans, Recorded Investment in Loans without Specific Reserve |  | 25
Impaired loans, Average Balance |  | 26
Equity lines |  |
Impaired loans |  |
Impaired loans, Unpaid Principal Balance | 31 | 365
Impaired loans, Recorded Investment in Loans without Specific Reserve | 31 | 31
Impaired loans, Recorded Investment in Loans with Specific Reserve |  | 326
Impaired loans, Related Allowance |  | 326
Impaired loans, Average Balance | 32 | 359
Impaired loans, Interest Income Recognized | 2 | 2
Consumer |  |
Impaired loans |  |
Impaired loans, Unpaid Principal Balance | 130 | 5
Impaired loans, Recorded Investment in Loans with Specific Reserve | 121 | 5
Impaired loans, Related Allowance | 118 |
Impaired loans, Average Balance | $ 123 | $ 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5258-111524 + Details
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