Stock-Based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Number of Shares
Beginning stock options outstanding (in shares)	2,056,898	2,071,757	2,283,785
Granted (in shares)	143,862	233,828	35,081
Exercised (in shares)	(3,970)	(143,282)	(155,731)
Forfeited (in shares)	(46,890)	(105,405)	(91,378)
Ending stock options outstanding (in shares)	2,149,900	2,056,898	2,071,757
Weighted Average Exercise Price Per Share
Beginning stock options outstanding (in dollars per share)	$ 9.86	$ 9.49	$ 9.23
Granted (in dollars per share)	5.82	11.35	9.48
Exercised (in dollars per share)	6.00	6.08	5.51
Forfeited (in dollars per share)	11.72	11.06	9.82
Ending stock options outstanding (in dollars per share)	$ 9.56	$ 9.86	$ 9.49
December 31, 2015
Number of Shares	2,132,794
Weighted Average Exercise Price Per Share (in dollars per share)	$ 9.57
Weighted Average Contractual Life	4 years 9 months 21 days
Aggregate Intrinsic Value	$ 8,672
December 31, 2015
Number of Shares	1,740,308
Weighted Average Exercise Price Per Share (in dollars per share)	$ 10.00
Weighted Average Contractual Life	4 years 29 days
Aggregate Intrinsic Value	$ 8,672