LOANS RECEIVABLE AND INVESTMENTS, NET - Summary of Net Loans Receivable and Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable
Allowance	$ (3,810)	$ (3,810)
Non-mortgage loans receivable, net, carrying amount	20,915	28,129
Total loans receivable and investments, net, amortized cost	208,378	176,811
Total loans receivable and investments, net, carrying amount	204,567	173,001
Total loans receivable and investments, net, fair value	205,062	173,869
Non-mortgage loans receivable, net
Accounts, Notes, Loans and Financing Receivable
Allowance	(3,810)	(3,810)
Non-mortgage loans receivable, amortized cost	24,726	31,939
Non-mortgage loans receivable, net, carrying amount	20,915	28,129
Non-mortgage loans receivable, fair value	20,528	27,640
Secured/mortgage loans and other, net
Accounts, Notes, Loans and Financing Receivable
Secured/mortgage loans and other, net, amortized cost	183,652	144,872
Allowance	0	0
Debt securities, held-to-maturity, carrying amount	183,652	144,872
Debt securities, held-to-maturity, fair value	184,534	146,229
Sales-type lease receivable	$ 39,600	$ 1,400