Goodwill and Intangible Assets - Changes in Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Line Items]
Beginning Balance, Goodwill Net	$ 193,831	$ 199,802
Acquisition	10,054
Effect of Foreign Currency	(8,152)	(5,971)
Ending Balance, Goodwill Net	195,733	193,831
Americas [Member]
Goodwill [Line Items]
Beginning Balance, Goodwill Net	193,831	199,802
Effect of Foreign Currency	(7,782)	(5,971)
Ending Balance, Goodwill Net	186,049	$ 193,831
EMEA [Member]
Goodwill [Line Items]
Acquisition	10,054
Effect of Foreign Currency	(370)
Ending Balance, Goodwill Net	$ 9,684