Property and Equipment, Net of Accumulated Depreciation and Amortization, by Geographic Areas (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Segment Reporting Information [Line Items]
Property and equipment, net of accumulated depreciation and amortization	$ 264,803		$ 266,608
United States
Segment Reporting Information [Line Items]
Property and equipment, net of accumulated depreciation and amortization	192,500		194,800
Europe
Segment Reporting Information [Line Items]
Property and equipment, net of accumulated depreciation and amortization	53,000	[1]	52,400	[1]
Japan
Segment Reporting Information [Line Items]
Property and equipment, net of accumulated depreciation and amortization	11,000	[1]	9,700	[1]
Other
Segment Reporting Information [Line Items]
Property and equipment, net of accumulated depreciation and amortization	$ 8,300	[1]	$ 9,700	[1]

[1] Total assets are impacted by movements in foreign currency exchange rates.