Amounts Included in Accumulated Other Comprehensive Loss, Net of Tax (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2014			$ (165,624)
Other comprehensive loss before reclassifications			(19,646)
Amounts reclassified from accumulated other comprehensive loss			2,491
Other comprehensive income (loss)	$ 12,522	$ 3,550	(17,155)	$ (6,294)
Balance at June 30, 2015	(182,779)	$ (44,413)	(182,779)	$ (44,413)
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			1,620
Other comprehensive income (loss)			1,620
Balance at June 30, 2015	(87,632)		(87,632)
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			(701)
Amounts reclassified from accumulated other comprehensive loss			871
Other comprehensive income (loss)			170
Balance at June 30, 2015	(1,028)		(1,028)
Foreign Currency Translation [Member]
Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2014			(75,174)
Other comprehensive loss before reclassifications			(18,945)
Amounts reclassified from accumulated other comprehensive loss			0
Other comprehensive income (loss)			(18,945)
Balance at June 30, 2015	$ (94,119)		$ (94,119)