Loans, Troubled Debt Restructurings Performing and Nonaccrual (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans	$ 44,499	$ 52,092
Nonaccrual Restructured Loans(a)	15,226	20,190
Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans	11,067	12,713
Nonaccrual Restructured Loans(a)	959	6,967
Commercial real estate — owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans	1,031	1,711
Nonaccrual Restructured Loans(a)	0	0
Commercial real estate — investor
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans	13,236	26,435
Nonaccrual Restructured Loans(a)	207	225
Real estate construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans	248	260
Nonaccrual Restructured Loans(a)	107	111
Residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans	15,253	7,825
Nonaccrual Restructured Loans(a)	13,235	11,509
Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans	2,787	1,957
Nonaccrual Restructured Loans(a)	718	1,379
Other consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans	877	1,191
Nonaccrual Restructured Loans(a)	$ 0	$ 0