Segment Information - Summary of Revenue, Property and Equipment, Net by Geographic Region (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net revenues:
Net revenue, total	$ 461,940	$ 476,871	$ 490,874
Property and equipment, net:
Property and equipment, net	34,945	38,122
United States [Member]
Net revenues:
Net revenue, total	199,790	208,874	224,980
Property and equipment, net:
Property and equipment, net	26,550	30,477
International [Member]
Net revenues:
Net revenue, total	262,150	267,997	265,894
Israel [Member]
Property and equipment, net:
Property and equipment, net	5,057	4,230
All Other [Member]
Property and equipment, net:
Property and equipment, net	$ 3,338	$ 3,415