Amounts Included in Accumulated Other Comprehensive Loss, Net of Tax (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2015			$ (208,806)
Other comprehensive income before reclassifications			3,904
Amounts reclassified from accumulated other comprehensive loss			2,606
Other comprehensive (loss) income	$ (4,840)	$ 12,522	6,510	$ (17,155)
Balance at June 30, 2016	(202,296)	$ (182,779)	(202,296)	$ (182,779)
Unrecognized Net Defined Benefit Plan Costs [Member]
Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2015			(84,280)
Other comprehensive income before reclassifications			0
Amounts reclassified from accumulated other comprehensive loss			1,811
Other comprehensive (loss) income			1,811
Balance at June 30, 2016	(82,469)		(82,469)
Change in Fair Value of Derivatives [Member]
Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2015			(988)
Other comprehensive income before reclassifications			(334)
Amounts reclassified from accumulated other comprehensive loss			795
Other comprehensive (loss) income			461
Balance at June 30, 2016	(527)		(527)
Foreign Currency Translation [Member]
Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2015			(123,538)
Other comprehensive income before reclassifications			4,238
Amounts reclassified from accumulated other comprehensive loss			0
Other comprehensive (loss) income			4,238
Balance at June 30, 2016	$ (119,300)		$ (119,300)