Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($) Agreement	Jun. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Income tax (expense) benefit	$ (3,242)	$ (2,665)	$ (5,727)	$ (3,825)
REVENUES	436,393	463,331	$ 882,077	910,716
ICE
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of distinct multiple element arrangements | Agreement			5
REVENUES	42,500	$ 70,800	$ 85,100	$ 141,500
Deferred revenue	$ 60,200		60,200		$ 67,000
Accounting Standards Update 2016-09
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Income tax (expense) benefit			$ 1,000