SHARE-BASED COMPENSATION AND EMPLOYEE BENEFIT PLANS (ESPP, Valuation Assumptions) (Details) (Employee Stock Purchase Plan [Member])	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Valuation Assumptions [Line Items]
Dividend yield	0.00%	0.00%
Expected life in years	3 months	3 months
Minimum [Member]
Valuation Assumptions [Line Items]
Risk-free interest rate	0.02%	0.02%
Expected volatility	48.90%	33.30%
Maximum [Member]
Valuation Assumptions [Line Items]
Risk-free interest rate	0.10%	0.07%
Expected volatility	93.10%	56.90%