Loans - Schedule of Payments in Arrears Past Due Financing Receivables (Parenthetical) (Details)	1 Months Ended	12 Months Ended
	Mar. 31, 2022 USD ($) Loan MortgageLoan Loans	Dec. 31, 2021 USD ($) Loan MortgageLoan		Dec. 31, 2020 USD ($) Loan MortgageLoan
Loans Details Secured Loans By Property Type Of Collateral [Line Items]
Reimbursement as a percentage of member's original purchase price | MortgageLoan	1	54		82
Forgone interest				$ 42,000
Interest, Due Date		Jan. 01, 2022		Jan. 01, 2021
Monthly payments, interest		$ 63,000		$ 21,000
Principal		$ 81,097,000		82,275,000
Maximum [Member]
Loans Details Secured Loans By Property Type Of Collateral [Line Items]
Principal				$ 137,000
Subsequent Event [Member]
Loans Details Secured Loans By Property Type Of Collateral [Line Items]
Reimbursement as a percentage of member's original purchase price | Loans	2
30-89 days [Member]
Loans Details Secured Loans By Property Type Of Collateral [Line Items]
Reimbursement as a percentage of member's original purchase price | Loan		2		1
Monthly payments, interest		$ 33,000	[1]	$ 2,000	[2]
30-89 days [Member] | Subsequent Event [Member]
Loans Details Secured Loans By Property Type Of Collateral [Line Items]
Reimbursement as a percentage of member's original purchase price | Loan	1
Past Due 180 Or More Days [Member]
Loans Details Secured Loans By Property Type Of Collateral [Line Items]
Reimbursement as a percentage of member's original purchase price | Loan		2		1
Monthly payments, interest		$ 92,000	[1]	$ 108,000	[2]
Principal	$ 586,000	$ 886,000		$ 3,286,000
Past Due 180 Or More Days [Member] | Subsequent Event [Member]
Loans Details Secured Loans By Property Type Of Collateral [Line Items]
Reimbursement as a percentage of member's original purchase price | Loans	1
Reimbursement as a percentage of member's original purchase price | Loans	1

[1] Interest includes foregone interest of approximately $63,000 on non-accrual loans with monthly payments in arrears. December 2021 interest is due January 1, 2022 and is not included in the payments in arrears at December 31, 2021

[2] Interest includes foregone interest of $42,000 on non-accrual loans past maturity and approximately $21,000 for monthly payments in arrears. December 2020 interest is due January 1, 2021 and is not included in the payments in arrears at December 31, 2020.