Accumulated Other Comprehensive Loss - Amounts Included in Accumulated Other Comprehensive Loss, Net of Tax (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2014			$ (165,624)
Other comprehensive loss before reclassifications			(34,071)
Amounts reclassified from accumulated other comprehensive loss			2,817
Other comprehensive loss	$ (14,099)	$ (33,603)	(31,254)	$ (39,897)
Balance at September 30, 2015	(196,878)	$ (78,016)	(196,878)	$ (78,016)
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			1,632
Other comprehensive loss			1,632
Balance at September 30, 2015	(87,620)		(87,620)
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			(1,292)
Amounts reclassified from accumulated other comprehensive loss			1,185
Other comprehensive loss			(107)
Balance at September 30, 2015	(1,305)		(1,305)
Foreign Currency Translation [Member]
Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2014			(75,174)
Other comprehensive loss before reclassifications			(32,779)
Amounts reclassified from accumulated other comprehensive loss			0
Other comprehensive loss			(32,779)
Balance at September 30, 2015	$ (107,953)		$ (107,953)