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Schedule of Rollforward of Noncontrolling Interest Balance (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Noncontrolling Interest [Line Items]
Net income attributable to noncontrolling interest	$ (7,704)	$ (5,026)
Noncontrolling Interest
Noncontrolling Interest [Line Items]
Noncontrolling interest beginning balance	273,826
Net income attributable to noncontrolling interest	7,704
Foreign currency translation adjustment	(2,178)
Noncontrolling interest ending balance	$ 279,352

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Carrying amount of the equity interests owned by noncontrolling shareholders, partners, or other equity holders in joint ventures included in the entity's consolidated financial statements.

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