Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Net income (loss)	$ 4,560	$ 312	$ (1,194)	$ (5,354)
Weighted-average common shares outstanding — basic	60,811	60,496	60,676	60,411
Effect of stock options and restricted stock units	715	345
Weighted-average common shares outstanding — diluted	61,526	60,841	60,676	60,411
Earnings (loss) per share — basic	$ 0.08		$ (0.02)	$ (0.09)
Earnings (loss) per share — diluted	$ 0.08		$ (0.02)	$ (0.09)