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Income Taxes (Provision for Income Taxes) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Tax Disclosure [Abstract]      
Current—The Netherlands $ 3,271 $ 6,752 $ 12,265
—Foreign 35,112 26,372 36,487
Provision for income tax current, total 38,383 33,124 48,752
Deferred—The Netherlands 0 0 0
—Foreign (22,767) (31,861) (19,942)
Provision for income tax deferred, total (22,767) (31,861) (19,942)
Total provision for income taxes $ 15,616 $ 1,263 $ 28,810