Loans - Secured Loans by Property Type (Details) $ in Thousands		1 Months Ended	3 Months Ended	12 Months Ended
		Jun. 30, 2020 MortgageLoan	Mar. 31, 2022 USD ($) Loan MortgageLoan	Dec. 31, 2021 USD ($) MortgageLoan
Loans (Details) - Secured Loans by Property Type [Line Items]
Number of secured loans | MortgageLoan		2	28	31
Secured loans, principal			$ 57,205	$ 55,099
Loans - percent			100.00%	100.00%
Single Family [Member]
Loans (Details) - Secured Loans by Property Type [Line Items]
Number of secured loans	[1]		13	16
Secured loans, principal	[1]		$ 13,734	$ 14,597
Loans - percent	[1]		24.00%	26.00%
Multi-family [Member]
Loans (Details) - Secured Loans by Property Type [Line Items]
Number of secured loans			2	2
Secured loans, principal			$ 7,550	$ 7,550
Loans - percent			13.00%	14.00%
Commercial [Member]
Loans (Details) - Secured Loans by Property Type [Line Items]
Number of secured loans			13	13
Secured loans, principal			$ 35,921	$ 32,952
Loans - percent			63.00%	60.00%

[1] Single family property type at March 31, 2022, consists of 5 loans with aggregate principal of approximately $3,071,000 that are owner occupied and 8 loans with aggregate principal of approximately $10,663,000 that are non-owner occupied. At December 31, 2021, single family property consisted of 4 loans with aggregate principal of approximately $2,306,000 that were owner occupied and 12 loans with aggregate principal of approximately $12,291,000 that were non-owner occupied. Single family includes 1-4 unit residential buildings, condominium units, townhouses and condominium complexes.