STOCKHOLDERS' EQUITY, Stock Options (Details) (USD $)	9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011
Performance Based [Member]
Stock Option Activity [Roll Forward]
Granted (in shares)	111,000
Market-Based Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield (in hundredths)			0.00%
Risk-free interest rate (in hundredths)			3.90%
Expected volatility (in hundredths)			41.50%
Expected life (in years)			3.04
Stock Option Activity [Roll Forward]
Granted (in shares)	15,000
Options outstanding at end of period (in shares)	1,763,155
Stock Options [Member]
Stock Option Activity [Roll Forward]
Options outstanding at beginning of period (in shares)	5,367,145
Granted (in shares)	2,010,400	[1]
Exercised (in shares)	(1,121)
Forfeited or canceled (in shares)	(1,522,014)
Options outstanding at end of period (in shares)	5,854,410	[2]
Options vested at end of period or expected to vest (in shares)	5,200,369
Options exercisable at end of period (in shares)	2,260,515
Weighted-average exercise price, options outstanding at beginning of period (in dollars per share)	20.01
Weighted-average exercise price, options granted (in dollars per share)	11.17
Weighted-average exercise price, options exercised (in dollars per share)	9.55
Weighted-average exercise price, options forfeited or canceled (in dollars per share)	16.78
Weighted-average exercise price, options outstanding at end of period (in dollars per share)	17.81
Weighted-average exercise price, options vested at March 31, 2012 or expected to vest (in dollars per share)	17.84
Weighted-average exercise price, options exercisable at March 31, 2012 (in dollars per share)	20.00
Weighted-average remaining contractual term of options outstanding (in years)	4.22
Weighted-average remaining contractual term of options vested or expected to vest (in years)	4.19
Weighted-average remaining contractual term of options exercisable (in years)	3.10
Aggregate intrinsic value options outstanding	155,177,000
Aggregate intrinsic value options vested or expected to vest	133,833,000
Aggregate intrinsic value options exercisable	2,194,000
Aggregate intrinsic value of stock options exercised			1,100,000
Cash received from the exercise of stock options			2,200,000
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield (in hundredths)	0.00%		0.00%
Risk-free interest rate (in hundredths)	0.94%		2.06%
Expected volatility (in hundredths)	52.81%		41.20%
Expected life (in years)	4.56		4.48
Stock Option Activity [Roll Forward]
Weighted-average fair value of options granted (per share)	4.91		7.63

[1] Options granted during the nine months ended September 30, 2012 included 111,000 options that had vesting based on performance conditions and 15,000 options that had vesting based on either market conditions or a combination of performance or market conditions.

[2] Options outstanding at September 30, 2012 included 1,763,155 options that had vesting based on either performance conditions, market conditions or a combination of performance and market conditions.