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Accumulated Other Comprehensive Income - Schedule of Changes in Accumulated Other Comprehensive Income (Losses) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (190,155)	$ (72,392)	$ (154,870)	$ (75,357)
Other comprehensive income before reclassifications (net of tax)	15,484	85	(22,459)	410
Amounts reclassified from accumulated other comprehensive income (net of tax)	1,603	2,941	4,261	5,581
Other comprehensive income (loss)	17,087	3,026	(18,198)	5,991
Ending Balance	(173,068)	(69,366)	(173,068)	(69,366)
Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(75,561)	15,869	(34,224)	15,141
Other comprehensive income before reclassifications (net of tax)	16,704	(533)	(24,633)	195
Other comprehensive income (loss)	16,704	(533)	(24,633)	195
Ending Balance	(58,857)	15,336	(58,857)	15,336
Unrealized Gain (Loss) on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	5,122	(1,020)	2,356	(941)
Other comprehensive income before reclassifications (net of tax)	(1,220)	618	2,174	215
Amounts reclassified from accumulated other comprehensive income (net of tax)	(1,281)	462	(1,909)	786
Other comprehensive income (loss)	(2,501)	1,080	265	1,001
Ending Balance	2,621	60	2,621	60
Change in Pensions [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(116,994)	(87,266)	(120,260)	(89,547)
Amounts reclassified from accumulated other comprehensive income (net of tax)	2,918	2,444	6,184	4,725
Other comprehensive income (loss)	2,918	2,444	6,184	4,725
Ending Balance	(114,076)	(84,822)	(114,076)	(84,822)
Change in Other Postretirement Defined Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(2,722)	25	(2,742)	(10)
Amounts reclassified from accumulated other comprehensive income (net of tax)	(34)	35	(14)	70
Other comprehensive income (loss)	(34)	35	(14)	70
Ending Balance	$ (2,756)	$ 60	$ (2,756)	$ 60

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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