Income Taxes (Summary of Changes To Company's Liabilities for UTPs) (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011
Income Tax Disclosure [Line Items]
Opening balance - January 1	$ 139,916	$ 122,857
Unrecognized tax benefits	(587)	12,821
Potential additional interest	4,632	4,431
Potential additional penalties	(374)	1,872
Statute expirations	(54,690)	(1,382)
Tax settlements		(3,259)
Ending balance - September 30	$ 88,897	$ 137,340

This element represents the recognized expense for the amount of statutory penalties in the period in which the entity claims or expects to claim a tax position, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties or, if not recognizing the expense in the period in which the tax return was initially filed, the expense is generally recognized in the period in which the enterprise's judgment about meeting the minimum statutory threshold changes.

+ References+ Details

This element represents interest expense recognized 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.

+ References+ Details