Loans - Secured Loan Principal Transactions (Details) - USD ($)		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020
Receivables [Abstract]
Principal, beginning of period		$ 74,080,000	$ 86,203,000
Loans funded		25,248,000	7,718,000
Principal collected	[1]	(39,404,000)	(10,798,000)
Loan transferred from related mortgage fund		1,371,000	0
Loans transferred to related mortgage fund		(5,711,000)	(3,374,000)
Loans sold to non-affiliate		(485,000)	(2,730,000)
Foreclosures	[2]	0	2,939,000
Principal, ending of period		$ 55,099,000	$ 74,080,000

[1] Includes principal collected and held in trust at December 31, 2021 of approximately $464,000.

[2] In 2020 the partnership foreclosed on one loan, with a recorded investment of approximately $3,163,000. The net investment in the loan was adjusted to the estimated fair value of the related collateral, net of any costs to sell in arriving at net realizable value and net of any senior loans, which resulted in the recognition of foregone interest of approximately $140,000.