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Loans and Allowance for Loan Losses - Troubled Debt Restructurings That Are Not Performing (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Number of contracts | 3 | 2 | 3
Number of contracts | 0 | 0 | 0
Nonperforming Financial Instruments [Member] |  |  |
Number of contracts |  | 12 |
Recorded investment, subsequent default | $ 0 | $ 2,201 |
One-To-Four Family - Mixed Used Property [Member] |  |  |
Number of contracts |  | 1 |
Taxi Medallion Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] |  |  |
Number of contracts |  | 11 |
Recorded investment, subsequent default |  | $ 1,922 |
Commercial Business and Other Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] |  |  |
Number of contracts |  | 1 |
Recorded investment, subsequent default |  | $ 279 |

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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=123577603&loc=SL6953676-111524 + Details
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- Definition Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953682-111524 + Details
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