Shareholders' Deficit -Summary Of Changes In Stockholders' Deficit (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Class Of Stock [Line Items]
Beginning Balance, December 31, 2014			$ (704,012)
Issuance of common stock			58,634
Repurchase of common stock			(250,000)
Share-based compensation			23,288
Income tax benefits from share-based award activities			35,144
Q2 Solutions business combination			423,260
Deferred tax impact of the Q2 Solutions transaction			(7,521)
Net income	$ 108,839	$ 92,733	280,217	$ 268,057
Unrealized loss on marketable securities, net of tax	(64)	(6)	(215)	(469)
Unrealized loss on derivative instruments, net of tax	(8,440)	(3,561)	(8,660)	(2,311)
Reclassification adjustments, net of tax			10,379
Foreign currency translation, net of tax	(23,435)	$ (27,280)	(40,440)	$ (23,116)
Ending Balance, September 30, 2015	(179,926)		(179,926)
(Accumulated Deficit) [Member]
Class Of Stock [Line Items]
Beginning Balance, December 31, 2014			(788,798)
Repurchase of common stock			(43,985)
Net income			282,635
Ending Balance, September 30, 2015	(550,148)		(550,148)
Accumulated Other Comprehensive (Loss) Income [Member]
Class Of Stock [Line Items]
Beginning Balance, December 31, 2014			(59,091)
Unrealized loss on marketable securities, net of tax			(215)
Unrealized loss on derivative instruments, net of tax			(8,660)
Reclassification adjustments, net of tax			10,379
Foreign currency translation, net of tax			(37,874)
Ending Balance, September 30, 2015	(95,461)		(95,461)
Common Stock [Member]
Class Of Stock [Line Items]
Beginning Balance, December 31, 2014			1,242
Issuance of common stock			28
Repurchase of common stock			(39)
Ending Balance, September 30, 2015	1,231		1,231
Additional Paid-In Capital [Member]
Class Of Stock [Line Items]
Beginning Balance, December 31, 2014			142,586
Issuance of common stock			58,606
Repurchase of common stock			(205,976)
Share-based compensation			23,288
Income tax benefits from share-based award activities			35,144
Q2 Solutions business combination			423,260
Noncontrolling interest related to Q2 Solutions transaction			(231,030)
Deferred tax impact of the Q2 Solutions transaction			(7,521)
Ending Balance, September 30, 2015	238,357		238,357
Noncontrolling Interests [Member]
Class Of Stock [Line Items]
Beginning Balance, December 31, 2014			49
Noncontrolling interest related to Q2 Solutions transaction			231,030
Net income			(2,418)
Foreign currency translation, net of tax			(2,566)
Ending Balance, September 30, 2015	$ 226,095		$ 226,095