LOANS RECEIVABLE AND INVESTMENTS - Summary of Net Loans Receivable and Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable
Allowance	$ (3,866)	$ (3,976)
Non-mortgage loans receivable, net, carrying amount	29,347	26,152
Total loans receivable and investments, net, amortized cost	69,408	58,114
Total loans receivable and investments, net, carrying amount	65,542	54,138
Total loans receivable and investments, net, fair value	64,562	53,147
Non-mortgage loans receivable, net
Accounts, Notes, Loans and Financing Receivable
Allowance	(3,866)	(3,976)
Non-mortgage loans receivable, amortized cost	33,213	30,128
Non-mortgage loans receivable, net, carrying amount	29,347	26,152
Non-mortgage loans receivable, fair value	28,314	25,200
Secured/mortgage loans and other, net
Accounts, Notes, Loans and Financing Receivable
Secured/mortgage loans and other, net, amortized cost	36,195	27,986
Allowance	0	0
Debt securities, held-to-maturity, carrying amount	36,195	27,986
Debt securities, held-to-maturity, fair value	$ 36,248	$ 27,947