Stock-Based Compensation - Schedule of Weighted Average Fair Value of Options Granted (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options Outstanding, Weighted Average Exercise Price, and Additional Disclosures [Abstract]
Fair value of vested stock options	$ 6,468	$ 3,543	$ 920
Aggregate intrinsic value for options exercised	$ 2,067	$ 2,220	$ 681
Weighted-average grant date fair value per share	$ 7.20	$ 9.45	$ 5.30