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INCOME TAXES (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Provision (benefit) for income taxes          
Income tax benefit (expense) $ 12,064,000 $ 5,179,000 $ 10,320,000 $ (6,159,000)  
Deferred Tax Liabilities, Net $ 247,700,000   $ 247,700,000   $ 257,000,000