Other Comprehensive Income (Loss) (Components of Other Comprehensive Income (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]
Foreign currency translation adjustment, gross	$ 84,500	$ (16,642)	$ 155,153	$ (3,991)
Other comprehensive income (loss), gross total	90,698	(9,068)	158,903	69
Foreign currency translation adjustment, tax
Income tax benefit related to items of other comprehensive loss	(4,016)	(2,282)	(1,123)	(922)
Amounts reclassified, net of tax			3,433	6,193
Changes in fair value, net of tax			(806)	(3,055)
Foreign currency translation adjustment, net	84,500	(16,642)	155,153	(3,991)
Other comprehensive income (loss), total, net of tax	86,682	(11,350)	157,780	(853)
Interest Rate Swap [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified, gross	511	1,678	2,352	5,081
Changes in fair value, gross	2,181	3,535	305	(6,980)
Amounts reclassified, tax effect	(135)	(444)	(623)	(1,743)
Changes in fair value, tax effect	(2,542)	(937)	(81)	3,084
Amounts reclassified, net of tax	376	1,234	1,729	3,338
Changes in fair value, net of tax	(361)	2,598	224	(3,896)
Fuel [Member] \| Commodity Contract [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified, gross	789	1,342	2,765	4,616
Changes in fair value, gross	2,717	1,019	(1,672)	1,343
Amounts reclassified, tax effect	(302)	(512)	(1,061)	(1,761)
Changes in fair value, tax effect	(1,037)	(389)	642	(502)
Amounts reclassified, net of tax	487	830	1,704	2,855
Changes in fair value, net of tax	$ 1,680	$ 630	$ (1,030)	$ 841

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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Amount before tax, after 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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