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Business Combinations - Financing Receivable, Purchased with Credit Deterioration (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 01, 2021
Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Allowance for credit losses at acquisition   $ 6,542
Westchester Bank Holding Corporation    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Purchase price of PCD loans $ 346,883  
Allowance for credit losses at acquisition 6,542  
Non-credit discount at acquisition 8,457  
Par value of acquired PCD loans $ 361,882