SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) $ / shares shares	Sep. 30, 2019 $ / shares shares	Sep. 30, 2020 USD ($) numberOfSegments $ / shares shares	Sep. 30, 2019 $ / shares shares
Accounting Policies [Abstract]
Potentially dilutive securities (in shares) | shares	0	0	0	0
Distributions declared per share (in dollars per share) | $ / shares	$ 0.1495	$ 0.1625	$ 0.4485	$ 0.4875
Common share, distribution rate for share per day, declared | $ / shares			$ 0.04983333	$ 0.05416667
Number of reportable segments | numberOfSegments			1
Grants of rent deferrals, COVID-19	$ 2.6		$ 2.6
Grants of rental abatements, COVID-19	0.9		0.9
Deferred lease concessions, COVID-19	2.4		2.4
Reserve for payments not probable to collect, COVID-19	0.8		0.8
Reversal of rental income for abatements granted to tenants, COVID-19	$ 0.3		$ 0.9