LOANS RECEIVABLE AND INVESTMENTS - Summary of Net Loans Receivable and Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable
Allowance	$ (3,908)	$ (3,976)
Non-mortgage loans receivable, net, carrying amount	29,365	26,152
Total loans receivable and investments, net, amortized cost	63,092	58,114
Total loans receivable and investments, net, carrying amount	59,184	54,138
Total loans receivable and investments, net, fair value	57,545	53,147
Non-mortgage loans receivable, net
Accounts, Notes, Loans and Financing Receivable
Allowance	(3,908)	(3,976)
Non-mortgage loans receivable, amortized cost	33,273	30,128
Non-mortgage loans receivable, net, carrying amount	29,365	26,152
Non-mortgage loans receivable, fair value	28,392	25,200
Secured/mortgage loans and other, net
Accounts, Notes, Loans and Financing Receivable
Secured/mortgage loans and other, net, amortized cost	29,819	27,986
Allowance	0	0
Debt securities, held-to-maturity, carrying amount	29,819	27,986
Debt securities, held-to-maturity, fair value	$ 29,153	$ 27,947