Accumulated Other Comprehensive Income - Schedule of Changes in Accumulated Other Comprehensive Income (Losses) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (204,606)	$ (190,486)
Other comprehensive income before reclassifications (net of tax)	5,810	13,671
Amounts reclassified from accumulated other comprehensive income (net of tax)	1,383	2,071
Other comprehensive income	7,193	15,742
Ending Balance	(197,413)	(174,744)
Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(100,448)	(73,041)
Other comprehensive income before reclassifications (net of tax)	6,065	13,419
Other comprehensive income	6,065	13,419
Ending Balance	(94,383)	(59,622)
Unrealized Gain (Loss) on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	1,500	(225)
Other comprehensive income before reclassifications (net of tax)	(255)	252
Amounts reclassified from accumulated other comprehensive income (net of tax)	(691)	(186)
Other comprehensive income	(946)	66
Ending Balance	554	(159)
Change in Pensions [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(110,656)	(120,714)
Amounts reclassified from accumulated other comprehensive income (net of tax)	2,190	2,315
Other comprehensive income	2,190	2,315
Ending Balance	(108,466)	(118,399)
Change in Other Postretirement Defined Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	4,998	3,494
Amounts reclassified from accumulated other comprehensive income (net of tax)	(116)	(58)
Other comprehensive income	(116)	(58)
Ending Balance	$ 4,882	$ 3,436