Amounts Included in Accumulated Other Comprehensive Loss, Net of Tax (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31, 2012	$ (109,913)
Other comprehensive loss before reclassifications	(11,188)
Amounts reclassified from accumulated other comprehensive loss	2,649
Other comprehensive (loss) income	(8,539)	15,394
Balance at March 31, 2013	(118,452)	(99,888)
Unrecognized Net Defined Benefit Plan Costs
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31, 2012	(105,675)
Other comprehensive loss before reclassifications	318
Amounts reclassified from accumulated other comprehensive loss	1,724
Other comprehensive (loss) income	2,042
Balance at March 31, 2013	(103,633)
Change in Fair Value of Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31, 2012	(7,727)
Other comprehensive loss before reclassifications	538
Amounts reclassified from accumulated other comprehensive loss	925
Other comprehensive (loss) income	1,463
Balance at March 31, 2013	(6,264)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31, 2012	3,489
Other comprehensive loss before reclassifications	(12,044)
Other comprehensive (loss) income	(12,044)
Balance at March 31, 2013	$ (8,555)