INCOME TAXES (Details 2) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Reconciliation of the beginning and ending amount of unrecognized tax benefits
Balance, beginning of period		$ 4,318,000	$ 12,659,000
Additions for tax positions of the current year		9,465,000
Additions for tax positions of prior years		64,050,000	106,000
Reductions of tax positions of prior years:
Changes in judgment		(3,498,000)	(8,447,000)
Balance, end of period	74,335,000	74,335,000	4,318,000	12,659,000
Unrecognized tax benefits with high certainty of deductibility but with uncertainty about the timing of deductions	67,500,000	67,500,000	2,000,000
Amount of unrecognized tax benefits that would affect the effective income tax rate if recognized	6,800,000	6,800,000	2,300,000
Accrued interest and penalties related to the unrecognized tax benefits included in income tax expense		0	1,400,000	2,900,000
Accrued interest associated with unrecognized tax benefits	0	0	1,400,000
Estimated period to conclude appeals process for protesting certain unfavorable adjustments in IRS audit	12 months
Decrease in total unrecognized tax benefits due to unfavorable adjustments to the entity's 2003 through 2007 reported taxable incomes	16,100,000
Decrease in total unrecognized tax benefits		$ 3,500,000	$ 8,400,000
Minimum probability of realization of tax benefit for amount to be recognized (as a percent)	50.00%	50.00%