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Loans and Allowance for Credit Losses for Loans - Changes in Amounts of Loans and Advances to Related Parties (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2021
USD ($)
Loans and Leases Receivable, Related Parties [Roll Forward]  
Outstanding at beginning of year $ 239,625
New loans and advances 7,613
Repayments (13,799)
Outstanding at end of year $ 233,439