Costs Associated with Exit or Disposal Activities - Summary of Accrued Liability Associated with Exit Plans' Exit or Disposal Activities and Related Charges (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Restructuring Cost and Reserve [Line Items]
Beginning accrual	$ 1,346	$ 2,731	$ 1,558	$ 2,974
Cash payments	(196)	(428)	(408)	(673)
Other non-cash changes		(7)		(5)
Ending accrual	$ 1,150	2,111	$ 1,150	2,111
General and Administrative [Member] | EMEA [Member] | Lease Obligations and Facility Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Charges (reversals) of exit or disposal activities and related charges		$ (185)		$ (185)