Loans, Loans Modified in a Troubled Debt Restructuring (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) loan	Dec. 31, 2018 USD ($) loan	Dec. 31, 2017 USD ($) loan
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	85	86	77
Recorded Investment	$ 15,940	$ 11,429	$ 9,426
Unpaid Principal Balance	$ 16,150	$ 11,792	$ 11,900
Commercial and industrial
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	6	5	8
Recorded Investment	$ 7,588	$ 1,315	$ 3,991
Unpaid Principal Balance	$ 7,703	$ 1,330	$ 6,339
Commercial real estate - owner occupied
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	0	2
Recorded Investment	$ 0	$ 0	$ 690
Unpaid Principal Balance	$ 0	$ 0	$ 690
Commercial real estate - investor
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	2	0
Recorded Investment	$ 0	$ 1,393	$ 0
Unpaid Principal Balance	$ 0	$ 1,472	$ 0
Real estate construction
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	1	1	0
Recorded Investment	$ 77	$ 78	$ 0
Unpaid Principal Balance	$ 77	$ 80	$ 0
Residential mortgage
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	53	41	45
Recorded Investment	$ 7,436	$ 6,977	$ 4,238
Unpaid Principal Balance	$ 7,517	$ 7,210	$ 4,364
Home equity
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	24	34	22
Recorded Investment	$ 831	$ 1,649	$ 507
Unpaid Principal Balance	$ 845	$ 1,681	$ 507
Other consumer
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	1	3	0
Recorded Investment	$ 8	$ 17	$ 0
Unpaid Principal Balance	$ 8	$ 19	$ 0