Accumulated Other Comprehensive Income (Loss) - Schedule of Changes in Accumulated Other Comprehensive Income (Loss) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax [Roll Forward]
Foreign Currency Translation Adjustments, Beginning balance	$ (104,278)	$ (93,722)
OCI before reclassifications, Foreign Currency Translation Adjustments	(69,064)	(10,556)
Amounts reclassified from AOCI, Foreign Currency Translation Adjustments	0	0
Net current period other comprehensive income (loss), Foreign Currency Translation Adjustments	(69,064)	(10,556)	17,687
Foreign Currency Translation Adjustments, Ending balance	(173,342)	(104,278)	(93,722)
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax [Roll Forward]
(Losses) Gains on Derivatives Qualifying as Hedges, Beginning balance	(4,012)	(218)
OCI before reclassifications, (Losses) Gains on Derivatives Qualifying as Hedges	12,434	(4,956)
Amounts reclassified from AOCI, (Losses) Gains on Derivatives Qualifying as Hedges	3,949	1,162
Net current period other comprehensive income (loss), (Losses) Gains on Derivatives Qualifying as Hedges	16,383	(3,794)	(4,455)
(Losses) Gains on Derivatives Qualifying as Hedges, Ending balance	12,371	(4,012)	(218)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax [Roll Forward]
Pension and Postretirement Liability Adjustment, Beginning balance	(284,421)	(309,685)
OCI before reclassifications, Pension and Postretirement Liability Adjustment	(111,915)	4,339
Amounts reclassified from AOCI, Pension and Postretirement Liability Adjustment	16,877	20,925
Net current period other comprehensive income (loss), Pension and Postretirement Liability Adjustment	(95,038)	25,264	(41,548)
Pension and Postretirement Liability Adjustment, Ending balance	(379,459)	(284,421)	(309,685)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance, Total	(392,711)	(403,625)
OCI before reclassifications, Total	(168,545)	(11,173)
Amounts reclassified from AOCI, Total	20,826	22,087
Net current period other comprehensive income (loss), Total	(147,719)	10,914
Ending balance, Total	$ (540,430)	$ (392,711)	$ (403,625)