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Securities - Summary of Activity in Allowance for Credit Losses for Held To Maturity Debt Securities (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance $ 2,026 $ 0 $ 0
Credit loss expense (benefit) 56 1,900 0
Allowance for credit losses ending balance 2,082 2,026 0
Cumulative Effect, Period of Adoption, Adjustment      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance $ 0 126 0
Allowance for credit losses ending balance   $ 0 $ 126