Earnings per Share - Schedule of Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Numerator
Net Income	$ 3,423	$ 8,083	$ 16,215	$ 13,556
Denominator
Weighted-average shares outstanding (in shares)	21,448,892	21,290,759	21,406,599	21,193,825
Effect of dilutive securities (in shares)	194,509	237,787	197,536	233,573
Weighted-average diluted shares (in shares)	21,643,401	21,528,546	21,604,135	21,427,398
Basic earnings per share (in usd per share)	$ 0.16	$ 0.38	$ 0.76	$ 0.64
Diluted earnings per share (in usd per share)	$ 0.16	$ 0.38	$ 0.75	$ 0.63