Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) Agreement	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Income tax (expense) benefit	$ (2,485)	$ (1,160)
REVENUES	445,684	447,385
Accounting Standards Update 2016-09
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Income tax (expense) benefit	$ 900
ICE
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of distinct multiple element arrangements | Agreement	5
REVENUES	$ 42,500	$ 70,700
Deferred revenue	$ 63,600		$ 67,000