ACCOUNTING POLICIES - Fair Value of Financial Instruments (Details) - Mortgage-backed Securities, Issued by Private Enterprises $ in Millions		12 Months Ended
	Jun. 07, 2019 extensionOptions	Dec. 31, 2022 USD ($) extensionOptions	Dec. 31, 2021 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Allowance		$ 20.0
Cash-pay mezzanine loan		486.1	$ 486.1
Loan interest income		$ 40.0
Term	5 years
Number of extension options | extensionOptions	3	3
Extension term on mezzanine loan	1 year	1 year	1 year
Number of extension options exercised | extensionOptions		2
London Interbank Offered Rate (LIBOR)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Variable rate spread on mezzanine loan		0.0642	0.0642
Santerre Senior Loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal amount of debt		$ 1,000.0
Santerre Senior Loan | Borrower
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal amount of debt		$ 1,500.0
Santerre Senior Loan | London Interbank Offered Rate (LIBOR)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument, basis spread on variable rate		1.84%
Santerre Senior Loan | London Interbank Offered Rate (LIBOR) | Borrower
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument, basis spread on variable rate		3.36%