STOCKHOLDERS' EQUITY AND SHARE-BASED COMPENSATION EXPENSE - Summary of Restricted Stock Awards Activity (Details) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Weighted Average Grant Date Fair Value [Roll Forward]
Restricted stock awards vested, Fair value	$ 3.9	$ 5.2
Restricted Stock Awards (RSAs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non-vested stock outstanding at beginning of the period (in shares)	167
Granted (in shares)	0
Vested (in shares)	(130)
Forfeited (in shares)	(28)
Non-vested stock outstanding at end of the period (in shares)	9
Weighted Average Grant Date Fair Value [Roll Forward]
Non-vested stock outstanding at the beginning of the period (in dollars per share)	$ 5.89
Granted (in dollars per share)	$ 0.00
Vested (in dollars per share)	$ 5.68
Forfeited (in dollars per share)	$ 6.77
Non-vested stock outstanding at end of the period (in dollars per share)	$ 6.11
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non-vested stock outstanding at beginning of the period (in shares)	2,511
Granted (in shares)	1,972
Vested (in shares)	(692)
Forfeited (in shares)	(588)
Non-vested stock outstanding at end of the period (in shares)	3,203
Weighted Average Grant Date Fair Value [Roll Forward]
Non-vested stock outstanding at the beginning of the period (in dollars per share)	$ 4.51
Granted (in dollars per share)	$ 6.30
Vested (in dollars per share)	$ 4.62
Forfeited (in dollars per share)	$ 4.49
Non-vested stock outstanding at end of the period (in dollars per share)	$ 5.59