LOANS RECEIVABLE AND INVESTMENTS - Summary of Net Loans Receivable and Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable
Allowance	$ (3,810)	$ (3,976)
Non-mortgage loans receivable, net, carrying amount	23,754	26,152
Total loans receivable and investments, net, amortized cost	172,361	58,114
Total loans receivable and investments, net, carrying amount	168,551	54,138
Total loans receivable and investments, net, fair value	168,800	53,147
Non-mortgage loans receivable, net
Accounts, Notes, Loans and Financing Receivable
Allowance	(3,810)	(3,976)
Non-mortgage loans receivable, amortized cost	27,564	30,128
Non-mortgage loans receivable, net, carrying amount	23,754	26,152
Non-mortgage loans receivable, fair value	22,895	25,200
Secured/mortgage loans and other, net
Accounts, Notes, Loans and Financing Receivable
Secured/mortgage loans and other, net, amortized cost	144,797	27,986
Allowance	0	0
Debt securities, held-to-maturity, carrying amount	144,797	27,986
Debt securities, held-to-maturity, fair value	$ 145,905	$ 27,947