Operating Segments and Geographic Information Assets (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
Segment Reporting Information [Line Items]
Total current deferred tax assets	$ 5,628		$ 6,284
Income tax receivable	12,307		5,613
Other receivables	17,293		24,821
Prepaid expenses and other current assets	31,051		24,967
Total current assets	678,659		613,115
Property and equipment, net	88,770		82,241
Intangible assets, net	64,082		59,931
Total non-current deferred tax assets	33,283		34,112
Other assets	54,167		40,239
Total assets	918,961		829,638
Americas [Member]
Segment Reporting Information [Line Items]
Total current assets	141,117		143,236
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Total current assets	219,299		170,426
Japan [Member]
Segment Reporting Information [Line Items]
Total current assets	89,515		111,785
Europe [Member]
Segment Reporting Information [Line Items]
Total current assets	121,076		85,756
Total Segment Current Assets [Member]
Segment Reporting Information [Line Items]
Total current assets	571,007		511,203
Other businesses [Member]
Segment Reporting Information [Line Items]
Total current assets	19,536		14,489
Unallocated corporate and other [Member]
Segment Reporting Information [Line Items]
Total current assets	$ 21,837	[1]	$ 25,738	[1]

[1] Corporate assets primarily consist of cash and equivalents.