Changes in Accumulated Other Comprehensive Income (Loss) by Component, Net of Tax (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ (57,190)		$ (186,584)
Other comprehensive income (loss) before reclassifications	2,171		(7,101)
Amounts reclassified from accumulated other comprehensive income	(1,147)		17,408
Net current-period other comprehensive income (loss)	1,024		10,307
Ending Balance	(56,166)		(176,277)
Changes in Cash Flow Hedges
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	423		(58,452)
Other comprehensive income (loss) before reclassifications	(16)		972
Amounts reclassified from accumulated other comprehensive income	(220)	[1]	19,477
Net current-period other comprehensive income (loss)	(236)		20,449
Ending Balance	187		(38,003)
Pension and Other Postretirement Benefits Items
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(57,224)		(105,845)
Other comprehensive income (loss) before reclassifications	1,632		4,913
Amounts reclassified from accumulated other comprehensive income	(927)	[2]	(2,069)
Net current-period other comprehensive income (loss)	705		2,844
Ending Balance	(56,519)		(103,001)
Foreign Currency Items
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(389)		(22,287)
Other comprehensive income (loss) before reclassifications	555		(12,986)
Amounts reclassified from accumulated other comprehensive income	0		0
Net current-period other comprehensive income (loss)	555		(12,986)
Ending Balance	166		(35,273)
Non-controlling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance			(3,683)
Other comprehensive income (loss) before reclassifications			(2,046)
Amounts reclassified from accumulated other comprehensive income			(3)
Net current-period other comprehensive income (loss)			(2,049)
Ending Balance			$ (5,732)

[1] The accumulated other comprehensive loss component is related to the hedging activity amount at December 31, 2013 that was reclassified to operating income as we de-designated our cash flow hedges. See Note 6.

[2] The accumulated other comprehensive loss reclassification components are related to amortization of unrecognized actuarial losses and prior service costs, both of which are included in the computation of net periodic pension cost. See Note 10.