Property and Equipment, Net of Accumulated Depreciation and Amortization, by Geographic Areas (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
Segment Reporting Information [Line Items]
Property and equipment, net of accumulated depreciation and amortization	$ 259,160		$ 266,608
United States
Segment Reporting Information [Line Items]
Property and equipment, net of accumulated depreciation and amortization	190,200		194,800
Europe
Segment Reporting Information [Line Items]
Property and equipment, net of accumulated depreciation and amortization	51,000	[1]	52,400	[1]
Japan
Segment Reporting Information [Line Items]
Property and equipment, net of accumulated depreciation and amortization	10,200	[1]	9,700	[1]
Other
Segment Reporting Information [Line Items]
Property and equipment, net of accumulated depreciation and amortization	$ 7,800	[1]	$ 9,700	[1]

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