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Foreign Currency Transaction Gains and Losses (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Currency Transaction Gains (Losses) [Line Items]
Net transaction (losses) gains	$ (38,831)	$ 10,979
Operating income
Currency Transaction Gains (Losses) [Line Items]
Net transaction (losses) gains	(11,842)	11,904
Non-operating income/expense
Currency Transaction Gains (Losses) [Line Items]
Net transaction (losses) gains	(26,989)	$ (925)
Venezuelan bolívar fuerte
Currency Transaction Gains (Losses) [Line Items]
Unrealized loss on foreign currency exchange	$ 26,000

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Currency Transaction Gains (Losses) [Line Items]

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Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895

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-Publisher FASB
-Name Accounting Standards Codification
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Amount before tax of foreign currency transaction unrealized gain (loss) recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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