Earnings Per Share - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Numerator:
Net income	$ 5,275	$ 9,590	$ 5,473	$ 20,979
Denominator:
Weighted-average shares outstanding (in shares)	21,255,496	20,735,135	21,145,624	19,105,666
Effect of dilutive securities (in shares)	253,015	110,559	230,916	98,139
Weighted-average diluted shares (in shares)	21,508,511	20,845,694	21,376,540	19,203,805
Basic earnings per share (in usd per share)	$ 0.25	$ 0.46	$ 0.26	$ 1.10
Diluted earnings per share (in usd per share)	$ 0.25	$ 0.46	$ 0.26	$ 1.09