Amounts Included in Accumulated Other Comprehensive Loss, Net of Tax (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2016	$ (223,856)
Other comprehensive income before reclassifications	7,174
Amounts reclassified from accumulated other comprehensive loss	572
Other comprehensive income	7,746	$ 11,350
Balance at March 31, 2017	(216,110)	$ (197,456)
Unrecognized Net Defined Benefit Plan Costs [Member]
Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2016	(83,105)
Other comprehensive income before reclassifications	0
Amounts reclassified from accumulated other comprehensive loss	629
Other comprehensive income	629
Balance at March 31, 2017	(82,476)
Change in Fair Value of Derivatives [Member]
Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2016	540
Other comprehensive income before reclassifications	(283)
Amounts reclassified from accumulated other comprehensive loss	(57)
Other comprehensive income	(340)
Balance at March 31, 2017	200
Foreign Currency Translation [Member]
Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2016	(141,291)
Other comprehensive income before reclassifications	7,457
Amounts reclassified from accumulated other comprehensive loss	0
Other comprehensive income	7,457
Balance at March 31, 2017	$ (133,834)