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Other Comprehensive Income (Loss) (Components of Other Comprehensive Income (Loss)) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Components of Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustment, gross	$ 17,434
Other comprehensive income (loss), gross total	17,282	$ (4,482)
Income tax benefit related to items of other comprehensive loss	304	1,706
Amounts reclassified, net of tax	1,391	2,176
Changes in fair value, net of tax	(1,239)	(4,952)
Foreign currency translation adjustment, net	17,434
Other comprehensive income (loss), total, net of tax	17,586	(2,776)
Interest Rate Swap [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified, gross	1,081	1,711
Changes in fair value, gross	1,027	(6,689)
Amounts reclassified, tax effect	(286)	(651)
Changes in fair value, tax effect	(272)	2,545
Amounts reclassified, net of tax	795	1,060
Changes in fair value, net of tax	755	(4,144)
Fuel [Member] | Commodity Contract [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified, gross	964	1,801
Changes in fair value, gross	(3,224)	(1,305)
Amounts reclassified, tax effect	(368)	(685)
Changes in fair value, tax effect	1,230	497
Amounts reclassified, net of tax	596	1,116
Changes in fair value, net of tax	$ (1,994)	$ (808)

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Amount before tax, after reclassification adjustments, 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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