Restructuring Program - Schedule of Restructuring Program Activity (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Restructuring and Related Activities [Abstract]
Liability as of December 31, 2014			$ 7,691
Costs incurred	$ 0	$ 1,196	267	$ 1,196
Payments made			$ (7,958)