Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Jan. 31, 2016	Feb. 11, 2014
Common stock repurchased and retired (in shares)	320,000
Common stock repurchased and retired	$ 7,600
Share price (in dollars per share)	$ 23.63			$ 20.07
Change in Stockholders’ Equity
Decrease in total stockholders' equity	$ 9,300
Decrease in stockholders' equity due to net loss	7,527	$ (12,904)
Increase in stockholders' equity from the exercise of stock options	400
Increase in stockholders' equity related to equity-based compensation expense	$ 6,200
Maximum
Share repurchase program, authorized amount (in shares)			$ 60,000