STOCK-BASED COMPENSATION (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended				3 Months Ended	12 Months Ended			3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2010	May 13, 2010	Mar. 31, 2012 2010 Omnibus Incentive Plan	Dec. 31, 2010 2010 Omnibus Incentive Plan	May 13, 2010 2010 Omnibus Incentive Plan	May 13, 2010 2002 Stock Incentive and Bonus Plan and 2003 Non-Employee Directors' Stock Incentive Plan	Mar. 31, 2012 Restricted stock Y
Stock Based Compensation
Shares of common stock authorized for issuance under the share-based compensation plan	2,500,000			2,500,000			2,000,000	500,000
Shares of common stock authorized for issuance pursuant to the exercise of incentive stock options			1,500,000
Plan expiration unless earlier terminated by the Board of Directors (in years)						P10Y
Shares of common stock issued under the Plan					1,061,000
Shares of restricted stock issued under the plan					448,000
Value of grants during the period					$ 9.0
Unrecognized share-based compensation cost related to unvested stock									19.1
Period over which unrecognized share-based compensation cost will be expensed (in years)									4
Share- based compensation cost	$ 2.0	$ 1.7