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Fair Value - Assets and Liabilities Recorded at Fair Value on a Nonrecurring Basis (Details) - Collateral-dependent loans - USD ($) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Assets with fair value adjustments on a nonrecurring basis |  |  |
Total impairment losses | $ 0 | $ 400,000 | $ 1,000,000.0
Fair Value, Measurements, Nonrecurring | Level 3 |  |  |
Assets with fair value adjustments on a nonrecurring basis |  |  |
Fair value |  | $ 1,840,000 |

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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