Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental Schedule of Cash and Cash Equivalents:
Cash and due from banks	$ 32,505	$ 29,587	$ 28,594
Interest-bearing deposits in other banks	47,077	34,668	23,883
Cash and cash equivalents	79,582	64,255	52,477
Cash paid for:
Interest on deposits and borrowed funds	15,310	9,553	7,240
Income taxes	4,698	5,056	7,653
Noncash investing and financing activities:
Transfer of loans to other real estate owned	234	599	1,233
Transfer from premises and equipment to other assets	445
Increase in operating lease right-of-use asset	4,453
Increase in operating lease liability	4,453
Unrealized gains (losses) on securities available for sale	8,821	(3,290)	(777)
Unrealized losses on cash flow hedges	(1,854)
Unrealized losses on cash flow hedges		(804)	0
Change in unfunded pension liability	(64)	1,291	(234)
Assets acquired:
Investment securities	34,876	0	0
Restricted stock	2,588	0	0
Loans	444,324	0	0
Premises and equipment	12,554	0	0
Deferred income taxes	2,960	0	0
Core deposit intangible	8,200	0	0
Other real estate owned	1,442	0	0
Bank owned life insurance	8,246	0	0
Other assets	14,244	0	0
Liabilities assumed:
Deposits	483,626	0	0
Short-term FHLB advances	14,883
Long-term FHLB advances	778
Subordinated debt	7,530
Other liabilities	5,780	0	0
Consideration:
Issuance of common stock	82,470	0	0
Fair value of replacement stock options/restricted stock	$ 753	$ 0	$ 0