Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Supplemental Schedule of Cash and Cash Equivalents:
Cash and due from banks	$ 29,587	$ 28,594	$ 20,268
Interest-bearing deposits in other banks	34,668	23,883	32,939
Cash and cash equivalents	64,255	52,477	53,207	$ 95,337
Cash paid for:
Interest on deposits and borrowed funds	9,553	7,240	6,348
Income taxes	5,056	7,653	6,477
Noncash investing and financing activities:
Transfer of loans to other real estate owned	599	1,233	295
Unrealized loss on securities available for sale	(3,290)	(777)	(6,572)
Unrealized loss on cash flow hedges	(804)	0	0
Change in unfunded pension liability	$ 1,291	$ (234)	$ 166