ORGANIZATION AND BUSINESS (Details) $ / shares in Units, ft² in Millions		9 Months Ended
	Apr. 04, 2014 shares	Sep. 30, 2020 USD ($) ft² property loan state shares	Aug. 14, 2020 $ / shares	Jun. 30, 2020 $ / shares	Dec. 31, 2019 USD ($) shares	Aug. 02, 2016 USD ($)	Jun. 30, 2016 USD ($) shares	Dec. 19, 2013 USD ($)	Jan. 26, 2012 USD ($)
Organization and Business [Line Items]
Number of owned properties | property		380
Rentable square feet (sqft) | ft²		17.9
Number of states in which entity owns properties | state		42
Percentage of rentable space leased		94.30%
Number of loans | loan		173
Net book value		$ 857,856,000			$ 301,630,000
Real estate-related securities		$ 75,212,000			$ 0
Common stock, shares issued (shares) | shares	297,400,000	309,405,505			311,207,725
Shares deregistered (shares) | shares	404,000
Net asset value per share (USD per share) | $ / shares				$ 7.31
IPO
Organization and Business [Line Items]
Common stock, shares authorized, value (maximum)									$ 2,975,000,000
Common stock, shares issued (shares) | shares	292,300,000
DRIP
Organization and Business [Line Items]
Common stock, shares issued (shares) | shares	5,100,000						241,700,000
Common stock shares registered dividend reinvestment plan, value						$ 600,000,000.0		$ 247,000,000.0
Remaining unsold common stock							$ 5,300,000
Share price (USD per share) | $ / shares			$ 7.31
CIM Real Estate Finance Operating Partnership, LP
Organization and Business [Line Items]
General partner partnership interest percentage		100.00%