Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Basic net income per share:
Net income	$ 8,857	$ 1,783	$ 10,429	$ 13,148
Weighted average common shares	14,730	14,730	14,730	14,781
Basic net income per share (in dollars per share)	$ 0.60	$ 0.12	$ 0.71	$ 0.89
Diluted net income per share:
Net income	$ 8,857	$ 1,783	$ 10,429	$ 13,148
Weighted average common shares	14,730	14,730	14,730	14,781
Effect of dilutive securities: stock options (in shares)	0	41	0	142
Diluted weighted average common shares	14,730	14,771	14,730	14,923
Diluted net income per share (in dollars per share)	$ 0.60	$ 0.12	$ 0.71	$ 0.88
Anti-dilutive shares not included in computation of net income (loss) per common share	775	150	775	150