Loans - Secured Loans by Property Type (Details)		1 Months Ended	12 Months Ended
		Jun. 30, 2020 MortgageLoan	Dec. 31, 2021 USD ($) MortgageLoan	Dec. 31, 2020 USD ($) MortgageLoan	Dec. 31, 2019 USD ($)
Loans (Details) - Secured Loans by Property Type [Line Items]
Number of secured loans | MortgageLoan		2	31	33
Secured loans, principal | $			$ 55,099,000	$ 74,080,000	$ 86,203,000
Loans - percent			100.00%	100.00%
Single Family [Member]
Loans (Details) - Secured Loans by Property Type [Line Items]
Number of secured loans | MortgageLoan	[1]		16	19
Secured loans, principal | $	[1]		$ 14,597,000	$ 16,598,000
Loans - percent	[1]		26.00%	22.00%
Multi-family [Member]
Loans (Details) - Secured Loans by Property Type [Line Items]
Number of secured loans | MortgageLoan			2	1
Secured loans, principal | $			$ 7,550,000	$ 6,300,000
Loans - percent			14.00%	9.00%
Commercial [Member]
Loans (Details) - Secured Loans by Property Type [Line Items]
Number of secured loans | MortgageLoan			13	12
Secured loans, principal | $			$ 32,952,000	$ 49,682,000
Loans - percent			60.00%	67.00%
Land [Member]
Loans (Details) - Secured Loans by Property Type [Line Items]
Number of secured loans | MortgageLoan			0	1
Secured loans, principal | $			$ 0	$ 1,500,000
Loans - percent			0.00%	2.00%

[1] Single family property type as of December 31, 2021 consists of 4 loans with aggregate principal of approximately $2,306,000 that are owner occupied and 12 loans with aggregate principal of approximately $12,291,000 that are non-owner occupied. At December 31, 2020, single family property consisted of 8 loans with aggregate principal of approximately $3,344,000 that were owner occupied and 11 loans with aggregate principal of approximately $13,254,000 that were non-owner occupied.