STOCKHOLDERS' EQUITY (Details 3) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 Y	Dec. 31, 2010	Dec. 31, 2009
Common Stock Options, Quantity
Exercised (in shares)	(364,324)	(2,728,000)	(2,072,533)
Intrinsic value of common stock options, SAR and equity based incentive awards exercised during the period
Stock-based compensation expense recognized	$ 18,318	$ 34,005	$ 47,607
Compensation cost related to unvested granted awards not yet recognized	11,172
Weighted average period of recognition of unrecognized compensation cost related to nonvested awards (in years)	3.03
Common stock options
Common Stock Options, Quantity
Outstanding at the beginning of the period (in shares)	7,426,499
Granted (in shares)	945,625
Modified December 15, 2011 (in shares)	(211,283)
Modified December 15, 2011 (in shares)	211,283
Exercised (in shares)	(364,326)
Forfeited (in shares)	(1,436,488)
Expired (in shares)	(130,000)
Outstanding at the end of the period (in shares)	6,441,310	7,426,499
Common Stock Options, Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 16.78
Granted (in dollars per share)	$ 18.08
Modified December 15, 2011 (in dollars per share)	$ 5.49
Exercised (in dollars per share)	$ 14.69
Forfeited (in dollars per share)	$ 12.27
Expired (in dollars per share)	$ 23.42
Outstanding at the end of the period (in dollars per share)	$ 17.96	$ 16.78
Nonvested Common Stock Options, Quantity
Nonvested Common Stock Options at the beginning of the period (in shares)	4,204,468
Granted (in shares)	945,625
Modified December 15, 2011 (in shares)	(211,283)
Modified December 15, 2011 (in shares)	211,283
Vested (in shares)	(2,356,414)
Forfeited (in shares)	(1,436,488)
Nonvested Common Stock Options at the end of the period (in shares)	1,357,191	4,204,468
Nonvested Common Stock Options, Weighted average grant-date fair value
Nonvested options at the beginning of the period (in dollars per share)	$ 10.97
Granted (in dollars per share)	$ 7.88
Modified December 15, 2011 (in dollars per share)	$ 11.90
Modified December 15, 2011 (in dollars per share)	$ 3.34
Vested (in dollars per share)	$ 10.15
Forfeited (in dollars per share)	$ 10.10
Nonvested options at the end of the period (in dollars per share)	$ 10.13	$ 10.97
Vested Common stock options
Vested Common Stock Options, Quantity (in shares)	5,084,119
Vested Common Stock Options, Weighted Average Exercise Price (in dollars per share)	$ 18.10
Vested Common Stock Options, Weighted Average Remaining Contractual Term (in years)	6.9
Intrinsic value of common stock options and equity based incentive awards outstanding and exercisable
Intrinsic value of options outstanding/exercisable	2,757
Intrinsic value of common stock options, SAR and equity based incentive awards exercised during the period
Total intrinsic value of options exercised	2,575	11,651
Equity-based incentive awards
Equity-based incentive awards, Quantity
Outstanding at the beginning of the period (in shares)	3,192,483
Granted (in shares)	512,500
Exercised (in shares)	(213,406)
Forfeited (in shares)	(649,688)
Expired (in shares)	(3,750)
Outstanding at the end of the period (in shares)	2,838,139	3,192,483
Equity-based incentive awards, Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 14.00
Granted (in dollars per share)	$ 14.00
Exercised (in dollars per share)	$ 14.00
Forfeited (in dollars per share)	$ 14.00
Expired (in dollars per share)	$ 14.00
Outstanding at the end of the period (in dollars per share)	$ 14.00	$ 14.00
Nonvested Equity-based incentive awards, Quantity
Outstanding at the beginning of the period (in shares)	2,276,667
Granted (in shares)	512,500
Vested (in shares)	(1,196,041)
Forfeited (in shares)	(649,688)
Outstanding at the end of the period (in shares)	943,438	2,276,667
Nonvested Equity-based incentive awards, Weighted average grant-date fair value
Outstanding at the beginning of the period (in dollars per share)	$ 2.80
Granted (in dollars per share)	$ 2.80
Vested (in dollars per share)	$ 2.80
Forfeited (in dollars per share)	$ 2.80
Outstanding at the end of the period (in dollars per share)	$ 2.80	$ 2.80
Vested Equity-based incentive awards
Vested Equity-based incentive awards, Quantity (in shares)	1,894,701
Vested Equity-based incentive awards, Weighted Average Exercise Price (in dollars per share)	$ 14.00
Vested Equity-based incentive awards, Weighted Average Remaining Contractual Term (in years)	7.8
Intrinsic value of common stock options and equity based incentive awards outstanding and exercisable
Intrinsic value of equity-based incentive awards outstanding/exercisable	2,757
Intrinsic value of common stock options, SAR and equity based incentive awards exercised during the period
Total intrinsic value of equity instruments other than options	598	857
Expected option life (in years)	4.5
Stock appreciation right (SAR)
Intrinsic value of common stock options, SAR and equity based incentive awards exercised during the period
Total intrinsic value of equity instruments other than options			$ 45,347