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Fair Value Accounting and Measurement (Financial Assets Accounted For Fair Value On Nonrecurring Basis) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Equity Securities $ 13,425   $ 13,425
Fair Value, Option, Changes in Fair Value, Gain (Loss) (197) $ (88)  
Fair Value, Nonrecurring [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Collateral dependent loans, Fair Value 2,262 1,520  
Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Collateral dependent loans, Fair Value 0 0  
Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Collateral dependent loans, Fair Value 0 0  
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Collateral dependent loans, Fair Value 2,262 1,520  
Collateral dependent loans [Domain] | Fair Value, Nonrecurring [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value, Option, Changes in Fair Value, Gain (Loss) $ (1,465) $ 722