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NOTES RECEIVABLE AND PREFERRED EQUITY INVESTMENT Schedule of Allowance for Credit Losses on Notes Receivable (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Balance at beginning of period $ 3,036 $ 5,943  
Reserves 240 93 2,943
Write off of notes receivable   (3,000)  
Balance at end of period $ 3,276 $ 3,036 $ 5,943