DEBT (Detail 2)		1 Months Ended
	Apr. 01, 2015 USD ($)	May. 31, 2015 USD ($)	Sep. 30, 2014 USD ($) item	Aug. 31, 2013 USD ($)	Feb. 29, 2012 USD ($)	Aug. 05, 2015 USD ($)	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)
Debt
Accrued interest and unused commitment fee payable							$ 976,000	$ 967,000
Principal payments on, and estimated amortization of debt
2015 (Six Months Ending December 31, 2015)							61,363,000
2016							419,354,000
2017							4,642,000
2018							24,300,000
2019							1,519,000
Thereafter							137,047,000
Total Debt							648,225,000
Unsecured revolving line of credit entered into February 2012 | CIM Urban Partners, L.P
Debt
Maximum borrowing capacity					$ 100,000,000
Unused commitment fee dependent upon amount of aggregate unused commitments, one (as a percent)				0.25%
Unused commitment fee dependent upon amount of aggregate unused commitments, two (as a percent)				0.35%
Unsecured revolving line of credit entered into February 2012 | LIBOR | CIM Urban Partners, L.P | Minimum
Debt
Interest rate margin (as a percent)				1.25%	1.75%
Unsecured revolving line of credit entered into February 2012 | LIBOR | CIM Urban Partners, L.P | Maximum
Debt
Interest rate margin (as a percent)				1.85%	2.50%
Unsecured revolving line of credit entered into August 2013 | CIM Urban Partners, L.P
Debt
Maximum borrowing capacity				$ 200,000,000
Unused commitment fee dependent upon amount of aggregate unused commitments, one (as a percent)				0.25%
Unused commitment fee dependent upon amount of aggregate unused commitments, two (as a percent)				0.35%
Unsecured revolving line of credit entered into August 2013 | LIBOR | CIM Urban Partners, L.P | Minimum
Debt
Interest rate margin (as a percent)				1.25%
Unsecured revolving line of credit entered into August 2013 | LIBOR | CIM Urban Partners, L.P | Maximum
Debt
Interest rate margin (as a percent)				1.85%
Mortgages Payable
Debt
Repayments of debt	$ 12,364,000
Principal payments on, and estimated amortization of debt
2015 (Six Months Ending December 31, 2015)							61,363,000
2016							4,354,000
2017							4,642,000
2018							24,300,000
2019							1,519,000
Thereafter							109,977,000
Total Debt							206,155,000	221,847,000
Other debt
Principal payments on, and estimated amortization of debt
2016							415,000,000
Thereafter							27,070,000
Total Debt							442,070,000	387,070,000
Unsecured credit facility entered into in September 2014
Debt
Maximum borrowing capacity			$ 850,000,000
Amount available for future borrowings							435,000,000	490,000,000
Amount outstanding under the facility							$ 415,000,000	$ 360,000,000
Period of extension option			1 year
Upsized borrowing capacity			$ 1,150,000,000
Number of extension | item			2
Unsecured credit facility entered into in September 2014 | Minimum
Debt
Interest rate (as a percent)							1.34%	1.31%
Unsecured credit facility entered into in September 2014 | Maximum
Debt
Interest rate (as a percent)							1.39%	1.37%
Unsecured credit facility entered into in September 2014, revolver
Debt
Maximum borrowing capacity			$ 450,000,000
Amount outstanding under the facility							$ 15,000,000	$ 35,000,000
Unused commitment fee dependent upon amount of aggregate unused commitments, one (as a percent)			0.15%
Unused commitment fee dependent upon amount of aggregate unused commitments, two (as a percent)			0.25%
Principal payments on, and estimated amortization of debt
Unused line fee (as a percent)			0.25%
Unsecured credit facility entered into in September 2014, revolver | Base rate | Minimum
Debt
Interest rate margin (as a percent)			0.20%
Unsecured credit facility entered into in September 2014, revolver | Base rate | Maximum
Debt
Interest rate margin (as a percent)			1.00%
Unsecured credit facility entered into in September 2014, revolver | LIBOR | Minimum
Debt
Interest rate margin (as a percent)			1.20%
Unsecured credit facility entered into in September 2014, revolver | LIBOR | Maximum
Debt
Interest rate margin (as a percent)			2.00%
Unsecured credit facility entered into in September 2014, term loan
Debt
Maximum borrowing capacity			$ 325,000,000
Amount outstanding under the facility							400,000,000	325,000,000
Unsecured credit facility entered into in September 2014, term loan | Base rate | Minimum
Debt
Interest rate margin (as a percent)			0.15%
Unsecured credit facility entered into in September 2014, term loan | Base rate | Maximum
Debt
Interest rate margin (as a percent)			0.95%
Unsecured credit facility entered into in September 2014, term loan | LIBOR | Minimum
Debt
Interest rate margin (as a percent)			1.15%
Unsecured credit facility entered into in September 2014, term loan | LIBOR | Maximum
Debt
Interest rate margin (as a percent)			1.95%
Unsecured credit facility entered into in September 2014, delayed-draw term loan
Debt
Maximum borrowing capacity			$ 75,000,000
Unsecured term facility entered into in May 2015
Debt
Maximum borrowing capacity		$ 385,000,000
Amount outstanding under the facility						$ 0
Unused commitment fee dependent upon amount of aggregate unused commitments, one (as a percent)		0.20%
Prepayment fee		2.00%
Period to draw on the term facility		6 months
Unsecured term facility entered into in May 2015 | Base rate | Minimum
Debt
Interest rate margin (as a percent)		0.60%
Unsecured term facility entered into in May 2015 | Base rate | Maximum
Debt
Interest rate margin (as a percent)		1.25%
Unsecured term facility entered into in May 2015 | LIBOR | Minimum
Debt
Interest rate margin (as a percent)		1.60%
Unsecured term facility entered into in May 2015 | LIBOR | Maximum
Debt
Interest rate margin (as a percent)		2.25%
Unsecured credit facilities
Debt
Pay-off of unsecured revolving line and term note			$ 323,000,000
Principal payments on, and estimated amortization of debt
Total Debt							$ 415,000,000	$ 360,000,000