Amounts Included in Accumulated Other Comprehensive Loss, Net of Tax (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2015			$ (208,806)
Other comprehensive income before reclassifications			9,969
Amounts reclassified from accumulated other comprehensive loss			3,575
Other comprehensive income (loss)	$ 7,034	$ (14,099)	13,544	$ (31,254)
Balance at September 30, 2016	(195,262)	$ (196,878)	(195,262)	$ (196,878)
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			3,377
Amounts reclassified from accumulated other comprehensive loss			2,615
Other comprehensive income (loss)			5,992
Balance at September 30, 2016	(78,288)		(78,288)
Change in Fair Value of Derivatives [Member]
Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2015			(988)
Other comprehensive income before reclassifications			(271)
Amounts reclassified from accumulated other comprehensive loss			960
Other comprehensive income (loss)			689
Balance at September 30, 2016	(299)		(299)
Foreign Currency Translation [Member]
Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2015			(123,538)
Other comprehensive income before reclassifications			6,863
Amounts reclassified from accumulated other comprehensive loss			0
Other comprehensive income (loss)			6,863
Balance at September 30, 2016	$ (116,675)		$ (116,675)