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Other Comprehensive Income (Loss) (Amounts Included in Accumulated Other Comprehensive Income (Loss)) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Components of Other Comprehensive Income (Loss) [Line Items]
Beginning balance			$ 108,413	$ (43,001)
Amounts reclassified into earnings			(1,721)	3,433
Changes in fair value			13,860	(806)
Foreign currency translation adjustment	$ 35,455	$ 84,500	(67,349)	155,153
Ending balance	53,203	114,779	53,203	114,779
Interest Rate Swap [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Beginning balance			13,951	8,094
Amounts reclassified into earnings	3,145	376	1,769	1,729
Changes in fair value	634	(361)	11,634	224
Ending balance	27,354	10,047	27,354	10,047
Foreign Currency Translation Adjustment [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Beginning balance			91,555	(50,931)
Foreign currency translation adjustment			(67,349)	155,153
Ending balance	24,206	104,222	24,206	104,222
Fuel [Member] | Commodity Contract [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Beginning balance			2,907	(164)
Amounts reclassified into earnings	(1,359)	487	(3,490)	1,704
Changes in fair value	222	1,680	2,226	(1,030)
Ending balance	$ 1,643	$ 510	$ 1,643	$ 510

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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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Amount after tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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