Loans, Troubled Debt Restructurings Performing and Nonaccrual (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans	$ 40,820	$ 52,092
Nonaccrual Restructured Loans(a)	17,624	20,190
Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans	11,985	12,713
Nonaccrual Restructured Loans(a)	2,114	6,967
Commercial real estate — owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans	1,488	1,711
Nonaccrual Restructured Loans(a)	0	0
Commercial real estate — investor
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans	13,627	26,435
Nonaccrual Restructured Loans(a)	220	225
Real estate construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans	256	260
Nonaccrual Restructured Loans(a)	109	111
Residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans	10,462	7,825
Nonaccrual Restructured Loans(a)	13,537	11,509
Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans	1,929	1,957
Nonaccrual Restructured Loans(a)	1,644	1,379
Other consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans	1,073	1,191
Nonaccrual Restructured Loans(a)	$ 0	$ 0