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INCOME TAXES (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
INCOME TAXES [Abstract]    
Income Tax Expense (Benefit) $ 20,093 $ 7,693
Effective Income Tax Rate, Continuing Operations 36.21209% 165.19218%
Noncash convertible debt conversion charge $ 0 $ 16,135