Loans, Loans Modified in a Troubled Debt Restructuring (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($) loan	Sep. 30, 2019 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	57	67
Recorded Investment(a)	$ 8,800	$ 7,500
Unpaid Principal Balance(b)	$ 9,280	$ 7,577
Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	3	1
Recorded Investment(a)	$ 1,250	$ 185
Unpaid Principal Balance(b)	$ 1,324	$ 185
Commercial real estate — owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	2	0
Recorded Investment(a)	$ 453	$ 0
Unpaid Principal Balance(b)	$ 751	$ 0
Commercial real estate — investor
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	1	0
Recorded Investment(a)	$ 530	$ 0
Unpaid Principal Balance(b)	$ 530	$ 0
Real estate construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	1	0
Recorded Investment(a)	$ 102	$ 0
Unpaid Principal Balance(b)	$ 102	$ 0
Residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	32	47
Recorded Investment(a)	$ 5,789	$ 6,785
Unpaid Principal Balance(b)	$ 5,870	$ 6,863
Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	18	18
Recorded Investment(a)	$ 676	$ 520
Unpaid Principal Balance(b)	$ 702	$ 520
Other consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	1
Recorded Investment(a)	$ 0	$ 9
Unpaid Principal Balance(b)	$ 0	$ 9