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Commitments and Contingencies - ACL on Unfunded Commitments (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Other Commitments [Line Items] |  |  |
Beginning balance | $ 70,185 | $ 36,171 | $ 35,042
Ending balance | 42,361 | 70,185 | 36,171
Cumulative Effect, Period of Adoption, Adjustment |  |  |
Other Commitments [Line Items] |  |  |
Beginning balance | 0 | 1,822 | 0
Ending balance |  | 0 | 1,822
Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |
Other Commitments [Line Items] |  |  |
Beginning balance | 70,185 | 37,993 | 35,042
Ending balance |  | 70,185 | 37,993
Unused Commitments to Extend Credit |  |  |
Other Commitments [Line Items] |  |  |
Beginning balance | 4,681 | 306 | 306
(Reversal of) provision for credit losses on unfunded commitments | (2,074) | 673 | 0
Ending balance | 2,607 | 4,681 | 306
Unused Commitments to Extend Credit | Cumulative Effect, Period of Adoption, Adjustment |  |  |
Other Commitments [Line Items] |  |  |
Beginning balance | 0 | 3,702 | 0
Ending balance |  | 0 | 3,702
Unused Commitments to Extend Credit | Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |
Other Commitments [Line Items] |  |  |
Beginning balance | $ 4,681 | 4,008 | 306
Ending balance |  | $ 4,681 | $ 4,008

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