Changes in Accumulated Other Comprehensive Loss by Component - Changes in Accumulated Other Comprehensive Loss by Component (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Amortization of prior service credit	$ (141)	$ (141)
Amortization of actuarial loss	10,591	10,932
Ending Balance	1,100,150
Cumulative Translation Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(75,415)	(22,034)
Other comprehensive income (loss) before reclassifications	12,517	(2,754)
Other comprehensive income (loss)	12,517	(2,754)
Ending Balance	(62,898)	(24,788)
Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	1,967	3,454
Other comprehensive income (loss) before reclassifications	(389)	(4,044)
Income tax effect	149	1,557
Cash flow hedges	(10)	(1,412)
Income tax effect	4	516
Other comprehensive income (loss)	(246)	(3,383)
Ending Balance	1,721	71
Post-retirement Benefits
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(471,703)	(491,187)
Other comprehensive income (loss) before reclassifications	0	0
Foreign currency translation effect	(865)	2,029
Income tax effect	0
Amortization of prior service credit	(141)	(141)
Amortization of actuarial loss	10,591	10,932
Income tax effect	(3,719)	(3,853)
Other comprehensive income (loss)	5,866	8,967
Ending Balance	(465,837)	(482,220)
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(545,151)	(509,767)
Other comprehensive income (loss) before reclassifications	12,128	(6,798)
Foreign currency translation effect	(865)	2,029
Income tax effect	149	1,557
Cash flow hedges	(10)	(1,412)
Amortization of prior service credit	(141)	(141)
Amortization of actuarial loss	10,591	10,932
Income tax effect	(3,715)	(3,337)
Other comprehensive income (loss)	18,137	2,830
Ending Balance	$ (527,014)	$ (506,937)