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INCOME TAXES - Expected And Reported Income Taxes (Benefit) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]          
Federal statutory income tax rate     35.00% 35.00% 35.00%
Computed tax expense (benefit) at federal statutory rates on income (loss) before income taxes (benefit)     $ 8,310 $ 18,223 $ 23,461
State income tax expense (benefit), net of federal benefit     2,274 (865) 2,572
Federal tax expense associated with non-amortizable assets     0 0 19,246
Non recognition of expense due to full valuation allowance     203 0 (22,842)
Valuation allowance current year activity     0 (37,505) 0
Reversal of net tax on derivative liability     0 2,547 0
Decrease in valuation allowance for change in federal net operating loss carryback rules     0 0 (149)
Change in uncertain tax positions     0 0 (2,458)
Tax benefit shortfall associated with share-based awards     412 2,061 0
Nondeductible expenses and other     1,275 1,328 765
Income taxes (benefit)     12,474 (14,211) 20,595
Effective income tax rate 0.00% 0.00% 52.50% 27.30% 30.70%
Impairment loss     $ 22,307 $ 0 $ 0