ACQUISITIONS, DISPOSITIONS AND IMPAIRMENT CHARGES - Impairment Charges (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($) a
Real Estate [Line Items]
Impairment charge	$ 0	$ 0	$ 520	$ 0	$ 0	$ 3,642	$ 0	$ 0	$ 520	$ 3,642
Impairment of real estate area (in acres) | a										8.7
Unconsolidated joint ventures
Real Estate [Line Items]
Impairment charge									2,813	$ 0
Unconsolidated joint ventures | St Louis M O
Real Estate [Line Items]
Impairment charge									$ 520