Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017		Dec. 31, 2016
Supplemental Schedule of Cash and Cash Equivalents:
Cash and due from banks	$ 18,772	$ 27,418	$ 28,594	[1]
Interest-bearing deposits in other banks	57,881	67,372	23,883	[1]
Cash and Cash Equivalents	76,653	94,790	$ 52,477		$ 53,207
Cash paid for:
Interest on deposits and borrowed funds	2,101	1,596
Noncash investing and financing activities:
Transfer of loans to other real estate owned	532	402
Unrealized (losses) gains on securities available for sale	$ (3,742)	$ 752

[1] Derived from audited consolidated financial statements.