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Commitments and Contingencies (Summarized Credit-Related Financial Instruments) (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Commitments and Contingencies [Abstract]    
Commitments to extend credit $ 1,297,736 $ 1,133,503
Commercial letters of credit 1,700 225
Standby letters of credit and financial guarantees 33,853 19,476
Loans sold with recourse $ 124,860 $ 135,252