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Fair Values (Summary of Changes in Level 3 Assets) (Details) - Recurring Basis - Fair Value, Inputs, Level 3 - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance $ 25,274 $ 23,896
Purchases 3,375  
Repayments (200) (460)
Unrealized gains (losses) recorded in other comprehensive income (357) 1,838
Ending balance $ 28,092 $ 25,274