Pro Forma Financial Information (Detail) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2013 USD ($) $ / shares
Business Acquisition [Line Items]
Revenue | $	$ 532,978
Net income | $	$ 35,814
Net income per basic share | $ / shares	$ 0.47	[1]
Net income per diluted share | $ / shares	$ 0.46	[1]

[1] The per share amounts have been retroactively restated for all prior periods presented to reflect the Company's two-for-one common stock split effected in the form of a common stock dividend distributed on April 1, 2014. See Note 1 "Basis of Presentation" (d) for further discussion of the Stock Split.