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RELATED-PARTY TRANSACTIONS (Details)		3 Months Ended
RELATED-PARTY TRANSACTIONS (Details)	Jan. 01, 2019 sudsidiary	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)	Oct. 01, 2015	Mar. 11, 2014 USD ($)
Related-party transactions
Due to related parties		$ 9,105,000		$ 10,951,000
Wholesaling agreement, percent of selling price fee per share		2.75%
CIM Urban REIT Management, L.P. \| 0 - 500,000,000
Related-party transactions
Quarterly fee percentage		0.25%
CIM Urban REIT Management, L.P. \| 0 - 500,000,000 \| Minimum
Related-party transactions
Daily average adjusted fair value of investments		$ 0
CIM Urban REIT Management, L.P. \| 0 - 500,000,000 \| Maximum
Related-party transactions
Daily average adjusted fair value of investments		$ 500,000,000
CIM Urban REIT Management, L.P. \| 500,000,000 - 1,000,000,000
Related-party transactions
Quarterly fee percentage		0.2375%
CIM Urban REIT Management, L.P. \| 500,000,000 - 1,000,000,000 \| Minimum
Related-party transactions
Daily average adjusted fair value of investments		$ 500,000,000
CIM Urban REIT Management, L.P. \| 500,000,000 - 1,000,000,000 \| Maximum
Related-party transactions
Daily average adjusted fair value of investments		$ 1,000,000,000
CIM Urban REIT Management, L.P. \| 1,000,000,000 - 1,500,000,000
Related-party transactions
Quarterly fee percentage		0.225%
CIM Urban REIT Management, L.P. \| 1,000,000,000 - 1,500,000,000 \| Minimum
Related-party transactions
Daily average adjusted fair value of investments		$ 1,000,000,000
CIM Urban REIT Management, L.P. \| 1,000,000,000 - 1,500,000,000 \| Maximum
Related-party transactions
Daily average adjusted fair value of investments		$ 1,500,000,000
CIM Urban REIT Management, L.P. \| 1,500,000,000 - 4,000,000,000
Related-party transactions
Quarterly fee percentage		0.2125%
CIM Urban REIT Management, L.P. \| 1,500,000,000 - 4,000,000,000 \| Minimum
Related-party transactions
Daily average adjusted fair value of investments		$ 1,500,000,000
CIM Urban REIT Management, L.P. \| 1,500,000,000 - 4,000,000,000 \| Maximum
Related-party transactions
Daily average adjusted fair value of investments		$ 4,000,000,000
CIM Urban REIT Management, L.P. \| 4,000,000,000 - 20,000,000,000
Related-party transactions
Quarterly fee percentage		0.10%
CIM Urban REIT Management, L.P. \| 4,000,000,000 - 20,000,000,000 \| Minimum
Related-party transactions
Daily average adjusted fair value of investments		$ 4,000,000,000
CIM Urban REIT Management, L.P. \| 4,000,000,000 - 20,000,000,000 \| Maximum
Related-party transactions
Daily average adjusted fair value of investments		20,000,000,000
CIM Urban REIT Management, L.P. \| Asset Management Fees
Related-party transactions
Fees		4,326,000	$ 4,415,000
Due to related parties		4,370,000		4,540,000
CIM Urban REIT Management, L.P. \| Property Management Fees
Related-party transactions
Fees		1,005,000	1,122,000
CIM Management Entities
Related-party transactions
Due to related parties		2,360,000		3,202,000
CIM Management Entities \| Personnel Fees
Related-party transactions
Fees		1,630,000	1,734,000
CIM Management Entities \| Lease Commission Fees
Related-party transactions
Fees		22,000	189,000
CIM Management Entities \| Construction Management Fees
Related-party transactions
Fees		100,000	355,000
CIM Management Entities And Related Parties
Related-party transactions
Due from related parties		33,000		315,000
CIM Service Provider, LLC \| Base Service Fee
Related-party transactions
Fees		276,000	270,000
Fees payable per year under agreement						$ 1,000,000
CIM Service Provider, LLC \| Master Services Agreement
Related-party transactions
Due to related parties		2,083,000		1,490,000
Compensation expensed for performing other services		570,000	858,000
CIM SBA Staffing, LLC \| Personnel Fees
Related-party transactions
Due to related parties		410,000		1,347,000
Deferred personnel costs		6,000	48,000
CIM SBA Staffing, LLC \| Expenses Related to Lending Segment Subject to Reimbursement
Related-party transactions
Fees		637,000	601,000
CIM SBA Staffing, LLC \| Expenses Related to Corporate Services Subject to Reimbursement
Related-party transactions
Fees		77,000	67,000
CIM Management Entities Affiliate
Related-party transactions
Lease renewal term					5 years
Rental and other property income		27,000	$ 27,000
CIM Capital, LLC
Related-party transactions
Number of subsidiaries \| sudsidiary	4
CCO Capital, LLC \| Wholesaling Agreement
Related-party transactions
Due to related parties		119,000		138,000
Deferred costs		$ 279,000		$ 200,000