LOANS RECEIVABLE AND INVESTMENTS - Summary of Net Loans Receivable and Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable
Allowance	$ (3,810)	$ (3,810)
Non-mortgage loans receivable, net, carrying amount	25,642	28,129
Total loans receivable and investments, net, amortized cost	174,637	176,811
Total loans receivable and investments, net, carrying amount	170,826	173,001
Total loans receivable and investments, net, fair value	171,389	173,869
Non-mortgage loans receivable, net
Accounts, Notes, Loans and Financing Receivable
Allowance	(3,810)	(3,810)
Non-mortgage loans receivable, amortized cost	29,453	31,939
Non-mortgage loans receivable, net, carrying amount	25,642	28,129
Non-mortgage loans receivable, fair value	25,276	27,640
Secured/mortgage loans and other, net
Accounts, Notes, Loans and Financing Receivable
Secured/mortgage loans and other, net, amortized cost	145,184	144,872
Allowance	0	0
Debt securities, held-to-maturity, carrying amount	145,184	144,872
Debt securities, held-to-maturity, fair value	$ 146,113	$ 146,229