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VARIABLE INTEREST ENTITIES, CONTINGENT LIABILITY AND CONSOLIDATED JOINT VENTURES - Ground Leases (Details) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Nov. 01, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2016
Variable Interest Entities - Ground Lease
Revenue		$ 20,436,000	$ 21,071,000	$ 61,674,000	$ 63,171,000
Variable Interest Entity, Not Primary Beneficiary | The Vue
Variable Interest Entities - Ground Lease
Maximum Exposure to Loss		15,410,000		15,410,000
Owner/ Operator Mortgage from Third Party						$ 67,444,000
Current Balance of Owner or Operator Mortgage Debt Obtained From Third Party		66,307,000		$ 66,307,000
Percentage of operating expense shortfalls covered by the Company				78.00%
Amount of operating expense shortfalls covered by the Company	$ 238,000	221,000		$ 1,353,000
Variable Interest Entity, Not Primary Beneficiary | The Vue | Ground lease rental income
Variable Interest Entities - Ground Lease
Revenue		$ 0	$ 243,000	$ 0	$ 729,000

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The amount of operating expense shortfalls, in excess of the initial operating expense deposit, paid by the Company.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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