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Other Comprehensive Income (Loss) (Amounts Included in Accumulated Other Comprehensive Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Components of Other Comprehensive Income (Loss) [Line Items]
Beginning balance			$ (43,001)	$ (12,171)
Amounts reclassified into earnings			3,433	6,193
Changes in fair value			(806)	(3,055)
Foreign currency translation adjustment	$ 84,500	$ (16,642)	155,153	(3,991)
Ending balance	114,779	(13,024)	114,779	(13,024)
Interest Rate Swap [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Beginning balance			8,094	(6,037)
Amounts reclassified into earnings	376	1,234	1,729	3,338
Changes in fair value	(361)	2,598	224	(3,896)
Ending balance	10,047	(6,595)	10,047	(6,595)
Foreign Currency Translation Adjustment [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(50,931)
Foreign currency translation adjustment			155,153	(3,991)
Ending balance	104,222	(3,991)	104,222	(3,991)
Fuel [Member] | Commodity Contract [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(164)	(6,134)
Amounts reclassified into earnings	487	830	1,704	2,855
Changes in fair value	1,680	630	(1,030)	841
Ending balance	$ 510	$ (2,438)	$ 510	$ (2,438)

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- Definition

Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount after tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).

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