CERTAIN RELATIONSHIPS AND RELATED PARTY TRANSACTIONS (Advances to Affiliated Real Estate Limited Partnership) (Details) (Affiliated Real Estate Limited Partnership [Member], USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Affiliated Real Estate Limited Partnership [Member]
Related Party Transaction [Line Items]
Maximum revolving note, related party	$ 3,000,000
Interest rate description	bearing interest at the prime rate
Notes receivable, related party	2,500,000		2,600,000
Other revenues from transactions with related party	$ 18,000	$ 16,000