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LONG-TERM DEBT LIABILITIES - Debt Extinguishment and Net Interest Expense (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Extinguishment of Debt Disclosures [Abstract]        
Net (gain) loss on debt extinguishment $ 0 $ 0 $ 0 $ 0
Net Interest Expense        
Interest expense 11,839 2,624 23,891 5,355
Amortization of deferred financing costs 1,054 921 2,172 1,884
Amortization of original issue discount of senior notes 61 0 120 0
Interest expense on interest rate hedging agreements 545 1,712 1,392 3,994
Interest income and other investment income (3) (3) (6) (7)
Total net interest expense $ 13,496 $ 5,254 $ 27,569 $ 11,226