Condensed Financial Information Parent Company (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flow from operating activities
Net income	$ 4,350	$ 4,871	$ 4,378
Adjustments to reconcile net income to net cash flow from operating activities:
Deferred tax benefit	(28)	(129)	303
Net cash flow from operating activities	9,133	14,102	3,846
Cash deficit from financing activities
Dividends paid	(1,726)	(1,237)	(1,082)
Net cash flow from financing activities	49,514	40,912	36,451
Net change in cash and cash equivalents	3,774	(3,145)	7,927
Cash
Beginning of period	15,351	18,496	10,569
End of period	19,125	15,351	18,496
Parent Company
Cash flow from operating activities
Net income	4,350	4,871	4,378
Adjustments to reconcile net income to net cash flow from operating activities:
Equity in undistributed net income of subsidiaries	(2,839)	(3,634)	(1,379)
Deferred tax benefit	62	(15)	(6)
Equity compensation	143	75
Change in other assets and liabilities	188	138	(35)
Net cash flow from operating activities	1,904	1,435	2,958
Cash deficit from financing activities
Dividends paid	(1,726)	(1,237)	(1,082)
Treasury shares purchased	(237)		(1,850)
Net cash flow from financing activities	(1,963)	(1,237)	(2,932)
Net change in cash and cash equivalents	(59)	198	26
Cash
Beginning of period	320	122	96
End of period	$ 261	$ 320	$ 122