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DEBT OBLIGATIONS, NET - Schedule of Maturities (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
Long-term Debt, Fiscal Year Maturity [Abstract]
2020	$ 1,900,025
2021	1,087,628
2022	665,357
2023	156,872
2024	408,282
Thereafter	1,476,059
Subtotal	5,694,223
Premiums included in mortgage loan financing	5,280
Debt obligations	5,681,020
Senior Unsecured Notes
Long-term Debt, Fiscal Year Maturity [Abstract]
Unamortized debt issuance costs	(17,841)
Mortgage Loan Financing
Long-term Debt, Fiscal Year Maturity [Abstract]
Unamortized debt issuance costs	$ (642)
Length of extension options	1 year

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