Costs Associated with Exit or Disposal Activities - Summary of Accrued Liability Associated with Exit Plans' Exit or Disposal Activities and Related Charges (Reversals) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Beginning Accrual	$ 1,558	$ 2,974	$ 3,969
Charges (reversals) of exit or disposal activities and related charges		(314)	262
Cash payments	(825)	(1,095)	(1,282)
Other non-cash changes		(7)	25
Ending Accrual	733	1,558	2,974
Lease Obligations and Facility Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Accrual	1,558	2,843	3,772
Charges (reversals) of exit or disposal activities and related charges		(185)	318
Cash payments	(825)	(1,095)	(1,264)
Other non-cash changes		(5)	17
Ending Accrual	$ 733	1,558	2,843
Severance and Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Accrual		131	187
Charges (reversals) of exit or disposal activities and related charges		(129)	(56)
Cash payments			(8)
Other non-cash changes		$ (2)	8
Ending Accrual			131
Legal-Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Accrual			10
Cash payments			$ (10)