DEBT - Fair Value of Fixed-Rate Debt not Recorded at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Carrying Value
Debt
Debt	$ 356,848	$ 358,433
Carrying Value | Level 1 | Convertible notes
Debt
Debt	287,500	287,500
Carrying Value | Level 2 | Mortgage loans
Debt
Debt	69,348	70,933
Fair Value
Debt
Debt	302,625	308,573
Fair Value | Level 1 | Convertible notes
Debt
Debt	242,407	247,126
Fair Value | Level 2 | Mortgage loans
Debt
Debt	$ 60,218	$ 61,447