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RELATED PARTY TRANSACTIONS (Details) - Joint ventures related to affiliated real estate investments - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
RELATED PARTY TRANSACTIONS
Management fees	$ 1.2	$ 1.0	$ 2.3	$ 1.8
Amounts due to the Company from related parties	17.1		17.1		$ 13.1
Mortgage loans receivable from consolidated joint ventures	35.4		35.4		$ 21.4
Ventures
RELATED PARTY TRANSACTIONS
Acquisition fees	$ 0.5	$ 0.0	$ 0.6	$ 0.7

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