Operating Segments and Geographic Information Assets (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Total current deferred tax assets	$ 6,284	$ 7,047
Income tax receivable	5,613	5,828
Other receivables	24,821	20,295
Prepaid expenses and other current assets	24,967	20,199
Total current assets	613,115	525,343
Property and equipment, net	82,241	67,684
Intangible assets, net	59,931	48,641
Total non-current deferred tax assets	34,112	30,375
Other assets	40,239	23,410
Total assets	829,638	695,453
Americas [Member]
Segment Reporting Information [Line Items]
Total current assets	143,236	97,188
Asia [Member]
Segment Reporting Information [Line Items]
Total current assets	282,211	239,281
Europe [Member]
Segment Reporting Information [Line Items]
Total current assets	85,756	83,871
Total Segment Current Assets [Member]
Segment Reporting Information [Line Items]
Total current assets	511,203	420,340
Other businesses [Member]
Segment Reporting Information [Line Items]
Total current assets	14,489	29,851
Unallocated corporate and other [Member]
Segment Reporting Information [Line Items]
Total current assets	$ 25,738	$ 21,783