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Loans and Allowance for Loan Losses - Loans Modified and Classified as TDR (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Number | 3 | 1 | 10
Balance | $ 951 | $ 1,620 | $ 6,741
Commercial Business and Other [Member] | Extended Maturity [Member] |  |  |
Number | 3 | 1 |
Balance | $ 951 | $ 1,620 |
Taxi Medallion Portfolio Segment [Member] | Interest Rate Below Market Reduction [Member] |  |  |
Number |  |  | 10
Balance |  |  | $ 6,741

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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
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- Definition Amount, after troubled debt restructuring, of modified financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
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