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Loans and Allowances for Credit Losses, Troubled Debt Restructurings (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Troubled Debt Restructuring, Recorded Investment $ 273,000 $ 187,000
Troubled Debt Restructuring, Performing in Accordance With Modified Terms 141,000 95,000
Troubled Debt Restructuring, Charge-offs 994 20,900
Troubled Debt Restructurings, Recorded Balance Modified During The Period 121,000 83,000
US Government Agency Insured Loans    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Troubled Debt Restructuring, Performing in Accordance With Modified Terms 97,000  
US Government Agency Insured Loans | Residential mortgage [Member] | Loans to individuals [Member] | Accruing [Member]    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Troubled Debt Restructuring, Recorded Investment $ 211,000 $ 152,000