Common Stock and Earnings Per Share (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Mar. 11, 2013
Common Stock and Earnings Per Share [Abstract]
Net income	$ 2,935	$ 2,847	$ 5,516	$ 5,333
Shares Used in Computing Basic and Diluted Net Income per Share [Abstract]
Weighted average common shares, basic (in shares)	12,839,968	12,849,884	12,844,500	12,835,495
Effect of dilutive securities [Abstract]
Employee stock-based compensation	80	0	81	0
Weighted average common shares, diluted (in shares)	12,840,048	12,849,884	12,844,581	12,835,495
Stock Repurchase Program [Abstract]
Number of shares authorized to be repurchased under the stock repurchase program (in shares)					1,200,000
Number of shares repurchased under the stock repurchase program (in shares)	12,900	0	37,229	0
Number of remaining shares authorized to be repurchased under the stock repurchase program (in shares)	618,004		618,004