STOCKHOLDERS' EQUITY AND SHARE-BASED COMPENSATION EXPENSE, Performance-Based Awards (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Jun. 30, 2012
Stockholders Equity And Share Based Compensation Expense [Abstract]
PRSU: Award Requisite Service Period (in months)	12 months
PRSU: Grants in Period, Net of Forfeitures (in shares)	240
Actual PRSUs achieved (in shares)		60
PRSU: Grant Date Intrinsic Value achieved (in dollars per share)	$ 6.71	$ 4.63
Expected PRSUs to be Achieved (in shares)		30
PRSU: Nonvested Awards, Total Compensation Cost Not yet Recognized		$ 249