Asset Impairment Charges and Facility Closing and Reorganization Costs - Facility Closing and Reorganization Costs (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]
Charges and Adjustments	$ 4,460	$ 27,008	$ 55,787
Restructuring Charges, Cash
Restructuring Cost and Reserve [Line Items]
Accrued Charges, Beginning Balance	17,389	13,792
Charges and Adjustments	2,989	27,149
Payments	(12,240)	(23,552)
Accrued Charges, Ending balance	8,138	17,389
Restructuring Charges, Cash | Workforce Reduction Costs
Restructuring Cost and Reserve [Line Items]
Accrued Charges, Beginning Balance	9,028	11,579
Charges and Adjustments	(2,877)	11,872
Payments	(4,868)	(14,423)
Accrued Charges, Ending balance	1,283	9,028
Restructuring Charges, Cash | Shutdown Costs
Restructuring Cost and Reserve [Line Items]
Accrued Charges, Beginning Balance	0	0
Charges and Adjustments	4,822	6,051
Payments	(4,822)	(6,051)
Accrued Charges, Ending balance	0	0
Restructuring Charges, Cash | Lease Obligations After Shutdown
Restructuring Cost and Reserve [Line Items]
Accrued Charges, Beginning Balance	8,361	1,986
Charges and Adjustments	446	7,822
Payments	(1,952)	(1,447)
Accrued Charges, Ending balance	6,855	8,361
Restructuring Charges, Cash | Restructuring Charges, Other
Restructuring Cost and Reserve [Line Items]
Accrued Charges, Beginning Balance	0	227
Charges and Adjustments	598	1,404
Payments	(598)	(1,631)
Accrued Charges, Ending balance	0	0
Restructuring Charges, Noncash Charges | Restructuring Charges, Other
Restructuring Cost and Reserve [Line Items]
Charges and Adjustments	841	447
Restructuring Charges, Noncash Charges | Write-Down of Assets
Restructuring Cost and Reserve [Line Items]
Charges and Adjustments	5,384	3,270
Restructuring Charges, Noncash Charges | Loss on Sale of Related Assets
Restructuring Cost and Reserve [Line Items]
Charges and Adjustments	$ (4,754)	$ (3,858)