Accumulated Other Comprehensive Income (Loss) - Schedule of Changes in Accumulated Other Comprehensive Income (Loss) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Statement Of Income And Comprehensive Income [Abstract]
Foreign Currency Translation Adjustments, Beginning balance	$ (93,722)	$ (111,410)
OCI before reclassifications, Foreign Currency Translation Adjustments	226	28,649
Net current period other comprehensive income (loss), Foreign Currency Translation Adjustments	226	28,649
Foreign Currency Translation Adjustments, Ending balance	(93,496)	(82,761)
(Losses) Gains on Derivatives Qualifying as Hedges, Beginning balance	(218)	4,237
OCI before reclassifications, (Losses) Gains on Derivatives Qualifying as Hedges	1,370	(1,658)
Amounts reclassified from AOCI, (Losses) Gains on Derivatives Qualifying as Hedges	(1,498)	954
Net current period other comprehensive income (loss), (Losses) Gains on Derivatives Qualifying as Hedges	(128)	(704)
(Losses) Gains on Derivatives Qualifying as Hedges, Ending balance	(346)	3,533
Pension and Postretirement Liability Adjustment, Beginning balance	(309,685)	(268,137)
OCI before reclassifications, Pension and Postretirement Liability Adjustment
Amounts reclassified from AOCI, Pension and Postretirement Liability Adjustment	5,132	4,421
Net current period other comprehensive income (loss), Pension and Postretirement Liability Adjustment	5,132	4,421
Pension and Postretirement Liability Adjustment, Ending balance	(304,553)	(263,716)
Beginning balance, Total	(403,625)	(375,310)
OCI before reclassifications, Total	1,596	26,991
Amounts reclassified from AOCI, Total	3,634	5,375
Net current period other comprehensive income (loss), Total	5,230	32,366
Ending balance, Total	$ (398,395)	$ (342,944)