Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Beginning Balance	$ (242,563)
Ending Balance	(231,555)
Cumulative currency translation adjustment [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Beginning Balance	(143,481)	$ (130,661)
Other comprehensive income (loss) before reclassifications	10,108	18,266
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Ending Balance	(133,373)	(112,395)
Benefit plan liabilities [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Beginning Balance	(97,612)	(84,124)
Other comprehensive income (loss) before reclassifications	(657)	(2,069)
Amounts reclassified from accumulated other comprehensive income (loss)	464	345
Ending Balance	(97,805)	(85,848)
Fair value change of derivatives [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Beginning Balance	(1,470)	(2,280)
Other comprehensive income (loss) before reclassifications	726	(2,748)
Amounts reclassified from accumulated other comprehensive income (loss)	367	673
Ending Balance	(377)	(4,355)
Accumulated other comprehensive loss [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Beginning Balance	(242,563)	(217,065)
Other comprehensive income (loss) before reclassifications	10,177	13,449
Amounts reclassified from accumulated other comprehensive income (loss)	831	1,018
Ending Balance	$ (231,555)	$ (202,598)