MORTGAGE AND OTHER INDEBTEDNESS - Schedule of Term Loans and Revolving Line of Credit (Details) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2022 USD ($) extension	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Gross debt	$ 2,979,068	$ 3,092,225
Unsecured credit facility revolving line of credit
Debt Instrument [Line Items]
Gross debt	$ 0	$ 55,000
Interest rate	4.24%	1.20%
Number of extension options \| extension	2
Extension period	6 months
Extension fee percentage	0.00075
Unsecured term loans
Debt Instrument [Line Items]
Gross debt	$ 820,000	$ 720,000
Unsecured term loans \| Unsecured term loan due November 2023
Debt Instrument [Line Items]
Gross debt	$ 0	$ 200,000
Interest rate	0.00%	4.10%
Unsecured term loans \| Unsecured term loan due November 2023 \| LIBOR
Debt Instrument [Line Items]
Gross debt		$ 200,000
Fixed interest rate		2.85%
Variable interest rate		1.25%
Unsecured term loans \| Unsecured term loan due November 2023 \| LIBOR \| Minimum
Debt Instrument [Line Items]
Credit spread		1.20%
Unsecured term loans \| Unsecured term loan due November 2023 \| LIBOR \| Maximum
Debt Instrument [Line Items]
Credit spread		1.85%
Unsecured term loans \| Unsecured term loan due November 2023 \| SOFR
Debt Instrument [Line Items]
Gross debt	$ 300,000
Fixed interest rate	2.70%
Variable interest rate	1.35%
Unsecured term loans \| Unsecured term loan due November 2023 \| SOFR \| Minimum
Debt Instrument [Line Items]
Credit spread	1.15%
Unsecured term loans \| Unsecured term loan due November 2023 \| SOFR \| Maximum
Debt Instrument [Line Items]
Credit spread	2.20%
Unsecured term loans \| Unsecured term loan due July 2024
Debt Instrument [Line Items]
Gross debt	$ 120,000	$ 120,000
Interest rate	2.68%	2.88%
Unsecured term loans \| Unsecured term loan due July 2024 \| LIBOR
Debt Instrument [Line Items]
Gross debt		$ 120,000
Fixed interest rate		1.68%
Variable interest rate		1.20%
Unsecured term loans \| Unsecured term loan due July 2024 \| LIBOR \| Minimum
Debt Instrument [Line Items]
Credit spread		1.20%
Unsecured term loans \| Unsecured term loan due July 2024 \| LIBOR \| Maximum
Debt Instrument [Line Items]
Credit spread		1.70%
Unsecured term loans \| Unsecured term loan due July 2024 \| SOFR
Debt Instrument [Line Items]
Gross debt	$ 120,000
Fixed interest rate	1.58%
Variable interest rate	1.10%
Unsecured term loans \| Unsecured term loan due July 2024 \| SOFR \| Minimum
Debt Instrument [Line Items]
Credit spread	0.80%
Unsecured term loans \| Unsecured term loan due July 2024 \| SOFR \| Maximum
Debt Instrument [Line Items]
Credit spread	1.65%
Unsecured term loans \| Unsecured term loan due October 2025
Debt Instrument [Line Items]
Gross debt	$ 250,000	$ 250,000
Interest rate	5.09%	5.09%
Unsecured term loans \| Unsecured term loan due October 2025 \| LIBOR
Debt Instrument [Line Items]
Fixed interest rate	5.09%
Number of extension options \| extension	3
Extension period	1 year
Unsecured term loans \| Unsecured term loan due July 2026
Debt Instrument [Line Items]
Gross debt	$ 150,000	$ 150,000
Interest rate	2.73%	2.97%
Unsecured term loans \| Unsecured term loan due July 2026 \| LIBOR
Debt Instrument [Line Items]
Gross debt		$ 150,000
Fixed interest rate		1.77%
Variable interest rate		1.20%
Unsecured term loans \| Unsecured term loan due July 2026 \| LIBOR \| Minimum
Debt Instrument [Line Items]
Credit spread		1.20%
Unsecured term loans \| Unsecured term loan due July 2026 \| LIBOR \| Maximum
Debt Instrument [Line Items]
Credit spread		1.70%
Unsecured term loans \| Unsecured term loan due July 2026 \| SOFR
Debt Instrument [Line Items]
Gross debt	$ 150,000
Fixed interest rate	1.68%
Variable interest rate	1.05%
Unsecured term loans \| Unsecured term loan due July 2026 \| SOFR \| Minimum
Debt Instrument [Line Items]
Credit spread	0.75%
Unsecured term loans \| Unsecured term loan due July 2026 \| SOFR \| Maximum
Debt Instrument [Line Items]
Credit spread	1.60%
Unsecured term loans \| Unsecured term loan due July 2029
Debt Instrument [Line Items]
Gross debt	$ 300,000	$ 0
Interest rate	4.05%	0.00%

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
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Contractual interest rate for funds borrowed, under the debt agreement.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

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