Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Supplemental Schedule of Cash and Cash Equivalents:
Cash and due from banks	$ 20,268	$ 19,352	$ 29,272
Interest-bearing deposits in other banks	32,939	75,985	38,031
Cash and cash equivalents	53,207	95,337	67,303	$ 67,681
Cash paid for:
Interest on deposits and borrowed funds	6,348	5,836	5,753
Income taxes	6,477	3,090	4,371
Noncash investing and financing activities:
Transfer of loans to other real estate owned	295	2,101	386
Unrealized gain (loss) on securities available for sale	(6,572)	(2,652)	3,488
Change in unfunded pension liability	166	538	(1,728)
Assets assumed:
Investment securities	0	18,507	0
Restricted stock	0	587	0
Loans	0	115,960	0
Premises and equipment	0	956	0
Deferred income taxes	0	2,794	0
Core deposit intangible	0	1,839	0
Other real estate owned, net	0	168	0
Bank owned life insurance	0	1,955	0
Other assets	0	1,049	0
Liabilities assumed:
Demand, MMDA, and savings deposits	0	82,451	0
Time deposits	0	54,872	0
Other liabilities	0	3,076	0
Issuance of common stock	$ 0	$ 20,483	$ 0