Consolidated Statements of Changes in Stockholders' Equity (unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Beginning Balance at Dec. 31, 2015	$ 24,795	$ 16,392	$ 55,151	$ (3,162)	$ 93,176
Beginning Balance (in shares) at Dec. 31, 2015	4,959,009
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	1,573	0	1,573
Total change in other comprehensive income or (loss), net of tax	0	0	0	2,176	2,176
Proceeds from exercise of stock options	$ 0	0	0	0	$ 0
Exercise of stock options (in shares)	0
Stock Issued During Period, Shares, Employee Stock Purchase Plans					0
Stock Repurchased and Retired During Period, Value	$ 0	0	0	0	$ 0
Stock Repurchased and Retired During Period, Shares	0
Cash dividends	$ 0	0	(992)	0	(992)
Ending Balance at Jun. 30, 2016	$ 24,795	16,392	55,732	(986)	95,933
Ending Balance (in shares) at Jun. 30, 2016	4,959,009
Beginning Balance at Dec. 31, 2016	$ 24,806	16,427	56,965	(4,208)	$ 93,990
Beginning Balance (in shares) at Dec. 31, 2016	4,961,258				4,961,258
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	2,103	0	$ 2,103
Total change in other comprehensive income or (loss), net of tax	0	0	0	1,464	1,464
Proceeds from exercise of stock options	$ 124	373	0	0	$ 497
Exercise of stock options (in shares)	24,806				(24,806)
Stock Issued During Period, Value, Employee Stock Purchase Plan	$ 9	38	0	0	$ 47
Stock Issued During Period, Shares, Employee Stock Purchase Plans	1,687				1,687
Stock Repurchased and Retired During Period, Value	$ (18)	(80)	0	0	$ (98)
Stock Repurchased and Retired During Period, Shares	(3,600)
Cash dividends	$ 0	0	(1,095)	0	(1,095)
Ending Balance at Jun. 30, 2017	$ 24,921	$ 16,758	$ 57,973	$ (2,744)	$ 96,908
Ending Balance (in shares) at Jun. 30, 2017	4,984,151				4,984,151