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Commitments and Contingencies (Summarized Credit-Related Financial Instruments) (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Commitments and Contingencies [Abstract]    
Commitments to extend credit $ 1,050,333 $ 853,148
Commercial letters of credit 57 2,178
Standby letters of credit and financial guarantees 16,225 47,251
Loans sold with recourse $ 136,797 $ 147,399