Goodwill and Other Intangible Assets, Net - Changes in Carrying Amount of Goodwill by Segment (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Goodwill And Other Intangible Assets [Line Items]
Balance at December 31, 2012	$ 120,940
Exchange rate fluctuations	(244)
Balance at September 30, 2013	120,696
Americas [Member]
Goodwill And Other Intangible Assets [Line Items]
Balance at December 31, 2012	108,833
Exchange rate fluctuations	(169)
Balance at September 30, 2013	108,664
Europe [Member]
Goodwill And Other Intangible Assets [Line Items]
Balance at December 31, 2012	3,815
Exchange rate fluctuations	(15)
Balance at September 30, 2013	3,800
Asia Pacific [Member]
Goodwill And Other Intangible Assets [Line Items]
Balance at December 31, 2012	8,292
Exchange rate fluctuations	(60)
Balance at September 30, 2013	$ 8,232