LONG-TERM INCENTIVE COMPENSATION (Details) (USD $)	6 Months Ended		1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended		0 Months Ended			12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 LTIP Units and Restricted Stock	Jun. 30, 2012 LTIP Units and Restricted Stock	Jun. 30, 2011 LTIP Units and Restricted Stock	Jun. 30, 2012 LTIP Units and Restricted Stock	Jun. 30, 2011 LTIP Units and Restricted Stock	Dec. 31, 2011 LTIP Units and Restricted Stock	Mar. 15, 2012 Officer	Mar. 15, 2012 Officer LTIP Units	Mar. 15, 2012 Officer Restricted Stock	Mar. 15, 2012 Other Employees Restricted Stock	Dec. 31, 2009 Senior Executives Long Term Investment Alignment Program	Jun. 30, 2012 Senior Executives Long Term Investment Alignment Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures (in shares)										279,611	1,358	9,435
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period						5 years
Percent of Awards Issued to Officers Subject to Performance Measures									17.00%
Stock Granted During Period, Value, Share-based Compensation, Net of Forfeitures						$ 6,400,000
Share-based Compensation	1,958,000	2,304,000		200,000		400,000		2,600,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized			3,800,000	3,800,000		3,800,000
Long Term Incentive and Share Based Compensation Expense			$ 1,800,000	$ 900,000	$ 1,400,000		$ 2,200,000
Maximum Percentage of Promote To Be Awarded as Share Based Compensation Awards													25.00%
Percent of Units Awarded														83.00%