Amounts Included in Accumulated Other Comprehensive Loss, Net of Tax (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2014	$ (165,624)
Other comprehensive loss before reclassifications	(30,905)
Amounts reclassified from accumulated other comprehensive loss	1,228
Other comprehensive loss	(29,677)	(9,844)
Balance at March 31, 2015	(195,301)	(47,963)
Unrecognized Net Defined Benefit Plan Costs [Member]
Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2014	(89,252)
Other comprehensive loss before reclassifications	0
Amounts reclassified from accumulated other comprehensive loss	774
Other comprehensive loss	774
Balance at March 31, 2015	(88,478)
Change in Fair Value of Derivatives [Member]
Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2014	(1,198)
Other comprehensive loss before reclassifications	(636)
Amounts reclassified from accumulated other comprehensive loss	454
Other comprehensive loss	(182)
Balance at March 31, 2015	(1,380)
Foreign Currency Translation [Member]
Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2014	(75,174)
Other comprehensive loss before reclassifications	(30,269)
Amounts reclassified from accumulated other comprehensive loss	0
Other comprehensive loss	(30,269)
Balance at March 31, 2015	$ (105,443)