FAIR VALUE MEASUREMENT - Schedule of Unobservable Inputs for Fair Values of Purchase Options (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Fair value
Loss on write-down or impairment of assets	$ 10,420	$ 4,361	$ 1,759
Real Estate Loan 1
Fair value
Loss on write-down or impairment of assets		1,600
Real Estate Loan 1 | Recurring basis | Level 3
Fair value
Purchase options, term	2 years 7 months 2 days
Real Estate Loan 2
Fair value
Loss on write-down or impairment of assets		2,761
Real Estate Loan 2 | Recurring basis | Level 3
Fair value
Purchase options, term	2 years 8 months 4 days
Real Estate Loan 3
Fair value
Loss on write-down or impairment of assets		$ 0	$ 1,800
Real Estate Loan 3 | Recurring basis | Level 3
Fair value
Purchase options, term	1 year 5 months 1 day
Exercise price | Real Estate Loan 1 | Recurring basis | Level 3
Fair value
Purchase options, exercise price	$ 15,143
Exercise price | Real Estate Loan 2 | Recurring basis | Level 3
Fair value
Purchase options, exercise price	17,377
Exercise price | Real Estate Loan 3 | Recurring basis | Level 3
Fair value
Purchase options, exercise price	$ 37,800
Expected volatility | Real Estate Loan 1 | Recurring basis | Level 3
Fair value
Purchase options, measurement input	0.650
Expected volatility | Real Estate Loan 2 | Recurring basis | Level 3
Fair value
Purchase options, measurement input	0.550
Expected volatility | Real Estate Loan 3 | Recurring basis | Level 3
Fair value
Purchase options, measurement input	0.550
Risk-free rate | Real Estate Loan 1 | Recurring basis | Level 3
Fair value
Purchase options, measurement input	0.003
Risk-free rate | Real Estate Loan 2 | Recurring basis | Level 3
Fair value
Purchase options, measurement input	0.003
Risk-free rate | Real Estate Loan 3 | Recurring basis | Level 3
Fair value
Purchase options, measurement input	0.002
Expected annualized equity dividend yield | Real Estate Loan 1 | Recurring basis | Level 3
Fair value
Purchase options, measurement input	0.065
Expected annualized equity dividend yield | Real Estate Loan 2 | Recurring basis | Level 3
Fair value
Purchase options, measurement input	0.075
Expected annualized equity dividend yield | Real Estate Loan 3 | Recurring basis | Level 3
Fair value
Purchase options, measurement input	0