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Loans (Summary of Collateral Dependent Loans) (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Financing Receivable, Impaired [Line Items]    
Collateral dependent loans on business assets $ 596 $ 2,379
Collateral dependent loans on real property 65,278 36,625
Collateral dependent loans 65,874 39,004
Collateral dependent loan with specific reserve 11,320 9,570
Commercial Business [Member]    
Financing Receivable, Impaired [Line Items]    
Collateral dependent loans on business assets 596 2,379
Collateral dependent loans on real property 1,062  
Collateral dependent loans 1,658 2,379
Collateral dependent loan with specific reserve 1,370 1,383
Commercial Mortgage [Member]    
Financing Receivable, Impaired [Line Items]    
Collateral dependent loans on real property 64,216 36,625
Collateral dependent loans 64,216 36,625
Collateral dependent loan with specific reserve $ 9,950 $ 8,187