Selected Segment Financial Data, Revenues and Income (Loss) Before Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Revenues	$ 213,939	$ 155,062	$ 581,766	$ 442,484
Income (loss) before income taxes	19,109	4,480	18,660	(8,743)
Americas | Operating Segments
Segment Reporting Information [Line Items]
Revenues	136,812	87,766	369,504	243,674
Income (loss) before income taxes	36,320	19,714	79,612	55,250
EMEA | Operating Segments
Segment Reporting Information [Line Items]
Revenues	51,692	42,844	145,982	137,252
Income (loss) before income taxes	14,968	13,493	43,176	37,365
Asia /Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues	25,435	24,452	66,280	61,558
Income (loss) before income taxes	10,641	7,406	19,828	15,384
Corporate | Corporate, Non-Segment
Segment Reporting Information [Line Items]
Income (loss) before income taxes	$ (42,820)	$ (36,133)	$ (123,956)	$ (116,742)