Loans and Allowance for Credit Losses on Loans - Loans In Active Deferral (Details) $ in Thousands	Mar. 31, 2021 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans modified under CARES Act, in deferral	$ 19,235
Loans modified under CARES Act, in nonaccrual, within deferral above	4,330
1st Deferral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans modified under CARES Act, in deferral	5,782
Loans modified under CARES Act, in nonaccrual, within deferral above	183
2nd Deferral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans modified under CARES Act, in deferral	8,927
Loans modified under CARES Act, in nonaccrual, within deferral above	1,731
3rd Deferral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans modified under CARES Act, in deferral	4,526
Loans modified under CARES Act, in nonaccrual, within deferral above	$ 2,416