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Income Taxes - Component of Income Taxes (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Income Tax Disclosure [Abstract]
Expected tax provision (benefit) at U.S. federal statutory income tax rate of 35%	$ (5,200,000)	$ 10,000,000
Incremental U.S. tax and rate differences on equity in earnings	(7,400,000)	(1,900,000)
Other, net	(100,000)	(100,000)
Total	$ (12,658,000)	$ 7,994,000

- Definition

The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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- Definition

The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

+ References+ Details