Accumulated Other Comprehensive Income - Schedule of Changes in Accumulated Other Comprehensive Income (Losses) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (154,870)	$ (75,357)
Other comprehensive income before reclassifications (net of tax)	(37,943)	325
Amounts reclassified from accumulated other comprehensive income (net of tax)	2,658	2,640
Other comprehensive income (loss)	(35,285)	2,965
Ending Balance	(190,155)	(72,392)
Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(34,224)	15,141
Other comprehensive income before reclassifications (net of tax)	(41,337)	728
Other comprehensive income (loss)	(41,337)	728
Ending Balance	(75,561)	15,869
Unrealized Gain (Loss) on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	2,356	(941)
Other comprehensive income before reclassifications (net of tax)	3,394	(403)
Amounts reclassified from accumulated other comprehensive income (net of tax)	(628)	324
Other comprehensive income (loss)	2,766	(79)
Ending Balance	5,122	(1,020)
Change in Pensions [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(120,260)	(89,547)
Amounts reclassified from accumulated other comprehensive income (net of tax)	3,266	2,281
Other comprehensive income (loss)	3,266	2,281
Ending Balance	(116,994)	(87,266)
Change in Other Postretirement Defined Benefit Plan [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(2,742)	(10)
Amounts reclassified from accumulated other comprehensive income (net of tax)	20	35
Other comprehensive income (loss)	20	35
Ending Balance	$ (2,722)	$ 25