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Commitments and Contingencies (Summarized Credit-Related Financial Instruments) (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Commitments and Contingencies [Abstract]    
Commitments to extend credit $ 1,108,614 $ 1,133,503
Commercial letters of credit 349 225
Standby letters of credit and financial guarantees 20,632 19,476
Loans sold with recourse $ 131,539 $ 135,252