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Income Taxes - Schedule of Accrued Interest and Penalties (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Uncertain Tax Positions [Line Items]
Uncertain tax positions, excluding interest and penalties	$ (48,353)	$ (41,241)	$ (45,936)	$ (27,008)
Accrued interest on uncertain tax positions	(7,029)	(8,931)
Accrued penalties on uncertain tax positions	(21,662)	(22,449)
Uncertain tax positions, including interest and penalties	$ (77,044)	$ (72,621)

This element represents the amount of statutory penalties accrued as of the date of the statement of financial position for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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- Definition

This element represents the amount of interest expense accrued as of the date of the statement of financial position for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.

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