Asset Impairment Charges and Facility Closing and Reorganization Costs - Approved Plans and Related Charges (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 9,297	$ 2,709	$ 9,063	$ 9,362
Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring charges	9,297	2,709	9,063	9,362
Charges incurred to date	74,200		74,200
Expected costs	4,200		4,200
Facility Closing and Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 9,297	$ 2,709	$ 9,063	$ 9,362