Recent Accounting Standards Updates - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in net cash provided by operating activities	$ 37,015	$ 36,887
Decrease in net cash used in financing activities	(125,226)	(366,166)
Accounting Standards Update 2016-09 [Member] | New Accounting Pronouncement, Early Adoption, Effect [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Amount of excess tax benefits recognition	$ 3,100
Effect of change on diluted earnings per share	$ 0.03
Increase in net cash provided by operating activities		3,900
Decrease in net cash used in financing activities		$ (3,900)