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INCOME TAXES (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
INCOME TAXES [Abstract]          
Income Tax Expense (Benefit) $ 13,589,000 $ 12,690,000 $ 64,722,000 $ 35,345,000  
Effective Income Tax Rate, Continuing Operations     39.64109% 44.52072%  
Noncash convertible debt conversion charge 0 0 0 16,135,000  
Unrecognized Tax Benefits 6,400,000   6,400,000   0
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 4,300,000   4,300,000    
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued 800,000   800,000   0
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions   $ 1,800,000 $ 2,300,000