CERTAIN RELATIONSHIPS AND RELATED PARTY TRANSACTIONS (Narrative) (Details)	1 Months Ended			1 Months Ended	9 Months Ended	0 Months Ended		3 Months Ended		9 Months Ended				9 Months Ended	0 Months Ended
	Jul. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Dec. 31, 2013 USD ($)	Jun. 30, 2014 RRE Opportunity REIT II [Member] USD ($)	Sep. 30, 2014 RRE Opportunity REIT II [Member] USD ($)	May 06, 2014 CVC Credit Partners Group Limited [Member]	May 06, 2014 CVC Credit Partners Group Limited [Member] EUR (€)	Sep. 30, 2014 Affiliated Real Estate Limited Partnership [Member] USD ($)	Sep. 30, 2013 Affiliated Real Estate Limited Partnership [Member] USD ($)	Sep. 30, 2014 Affiliated Real Estate Limited Partnership [Member] USD ($)	Sep. 30, 2013 Affiliated Real Estate Limited Partnership [Member] USD ($)	Dec. 31, 2013 Affiliated Real Estate Limited Partnership [Member] USD ($)	Dec. 31, 2010 Affiliated Real Estate Limited Partnership [Member] USD ($)	Sep. 30, 2014 Employees [Member] USD ($)	Feb. 06, 2014 IPO [Member] RRE Opportunity REIT II [Member] USD ($)
Related Party Transaction [Line Items]
Initial public offering, amount of offering															$ 1,000,000,000.0
Initial public offering, maximum price per share (in dollars per share)															$ 10.00
Due from related parties		32,637,000	30,923,000		3,100,000
Increase in related party loan receivable				1,300,000
Related party loan receivable, description of variable rate basis				LIBOR		EURIBOR								3-month LIBOR
Related party loan receivable, maximum borrowing capacity							1,500,000.0
Related party loan receivable, basis spread on variable rate					3.00%	7.00%								3.00%
Maximum revolving note, related party								3,000,000		3,000,000			2,000,000
Interest rate description											bearing interest at the prime rate
Notes receivable, related party								2,300,000		2,300,000		2,300,000
Other revenues from transactions with related party								19,000	17,000	56,000	53,000
Due from employee														300,000
Purchase of portfolio of securities	$ 23,500,000