Schedule IV - Mortgage Loans on Real Estate - Mortgage Loans on Real Estate (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Prior Liens		$ 0
Carrying Amount of Mortgages		444,966	$ 130,745	$ 87,359	$ 73,102
Mortgage Loans [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Original Face Amount of Mortgages		462,680
Carrying Amount of Mortgages	[1]	444,966
Allowance for Credit losses:	[1]	(6,800)
Principal Amount of Loans Subject to Delinquent Principal or Interest		$ 0
Retail Site [Member] | 1st Mortgage [Member] | Borrower B [Member] | Mortgage Loans [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Periodic Payment Terms	[2],[3],[4]	I
Prior Liens	[2],[4]	$ 0
Original Face Amount of Mortgages	[2],[4]	42,589
Carrying Amount of Mortgages	[1],[2],[4]	38,888
Principal Amount of Loans Subject to Delinquent Principal or Interest	[2],[4]	$ 0
Retail Site [Member] | 1st Mortgage [Member] | San Antonio, Texas [Member] | Borrower A [Member] | Mortgage Loans [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rate		9.00%
Final Maturity Date		2025-06
Periodic Payment Terms	[3]	I
Prior Liens		$ 0
Original Face Amount of Mortgages		146,158
Carrying Amount of Mortgages	[1]	146,158
Principal Amount of Loans Subject to Delinquent Principal or Interest		$ 0
Retail Site [Member] | 2nd Mortgage [Member] | Borrower G [Member] | Mortgage Loans [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Periodic Payment Terms	[3],[5]	I
Prior Liens	[5]	$ 0
Original Face Amount of Mortgages	[5]	132,901
Carrying Amount of Mortgages	[1],[5]	129,164
Principal Amount of Loans Subject to Delinquent Principal or Interest	[5]	$ 0
Retail Site [Member] | 2nd Mortgage [Member] | San Antonio, Texas [Member] | Borrower A [Member] | Mortgage Loans [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rate		12.00%
Final Maturity Date		2034-06
Periodic Payment Terms	[3]	I
Prior Liens		$ 0
Original Face Amount of Mortgages		50,219
Carrying Amount of Mortgages	[1]	50,219
Principal Amount of Loans Subject to Delinquent Principal or Interest		$ 0
Retail Site [Member] | 2nd Mortgage [Member] | San Antonio, Texas [Member] | Borrower B [Member] | Mortgage Loans [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rate		11.00%
Final Maturity Date		2027-09
Periodic Payment Terms	[3]	I
Prior Liens		$ 0
Original Face Amount of Mortgages		21,500
Carrying Amount of Mortgages	[1]	19,758
Principal Amount of Loans Subject to Delinquent Principal or Interest		$ 0
Retail Site [Member] | 2nd Mortgage [Member] | Euless, TX [Member] | Borrower C [Member] | Mortgage Loans [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rate		10.00%
Final Maturity Date		2029-06
Periodic Payment Terms	[3]	I
Prior Liens		$ 0
Original Face Amount of Mortgages		19,600
Carrying Amount of Mortgages	[1]	19,600
Principal Amount of Loans Subject to Delinquent Principal or Interest		$ 0
Retail Site [Member] | 2nd Mortgage [Member] | Lynwood, CA [Member] | Borrower D [Member] | Mortgage Loans [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rate		9.00%
Final Maturity Date		2025-07
Periodic Payment Terms	[3]	I
Prior Liens		$ 0
Original Face Amount of Mortgages		16,462
Carrying Amount of Mortgages	[1]	16,462
Principal Amount of Loans Subject to Delinquent Principal or Interest		$ 0
Retail Site [Member] | 2nd Mortgage [Member] | Jacksonville, FL [Member] | Borrower E [Member] | Mortgage Loans [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rate		10.00%
Final Maturity Date		2026-11
Periodic Payment Terms	[3]	I
Prior Liens		$ 0
Original Face Amount of Mortgages		15,000
Carrying Amount of Mortgages	[1]	15,000
Principal Amount of Loans Subject to Delinquent Principal or Interest		$ 0
Retail Site [Member] | 2nd Mortgage [Member] | Fairfax, VA [Member] | Borrower F [Member] | Mortgage Loans [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rate		8.00%
Final Maturity Date		2029-05
Periodic Payment Terms	[3]	I
Prior Liens		$ 0
Original Face Amount of Mortgages		14,000
Carrying Amount of Mortgages	[1]	14,000
Principal Amount of Loans Subject to Delinquent Principal or Interest		$ 0
Nonretail [Member] | Borrower A [Member] | Mortgage Loans [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Periodic Payment Terms	[3],[6]	P&I; PIK
Prior Liens	[6]	$ 0
Original Face Amount of Mortgages	[6]	3,854
Carrying Amount of Mortgages	[1],[6]	2,238
Principal Amount of Loans Subject to Delinquent Principal or Interest	[6]	$ 0
Nonretail [Member] | Borrower A [Member] | Other Financing Loans [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rate		7.00%
Final Maturity Date		2031-03
Periodic Payment Terms	[3]	P&I
Prior Liens		$ 0
Original Face Amount of Mortgages		397
Carrying Amount of Mortgages	[1]	279
Principal Amount of Loans Subject to Delinquent Principal or Interest		$ 0

[1] The aggregate cost for Federal income tax purposes was approximately $445.0 million as of December 31, 2024.

[2] Comprised of four separate loans with original loan amounts ranging from $5.3 million to $13.0 million.

[3] I = Interest only; P&I = Principal & Interest; PIK = Paid in Kind at Maturity.

[4] There was an outstanding undrawn mortgage loan balance of $3.7 million as of December 31, 2024, for which the Company earns interest at a rate of 1.0% annum.

[5] Comprised of 16 separate loans with original loan amounts ranging from $3.1 million to $12.5 million.

[6] Comprised of three separate loans with original loan amounts ranging from $0.5 million to $2.0 million.