Loans - Secured Loans Scheduled Maturities (Details)	1 Months Ended	12 Months Ended
	Mar. 31, 2022 USD ($) MortgageLoan	Dec. 31, 2021 USD ($) MortgageLoan	Dec. 31, 2020 USD ($) MortgageLoan	Dec. 31, 2019 USD ($)
Secured Loans Scheduled Maturities [Abstract]
2022, Loans | MortgageLoan		24
2023, Loans | MortgageLoan		17
2024, Loans | MortgageLoan		3
2025, Loans | MortgageLoan		5
2026, Loans | MortgageLoan		0
Thereafter, loans | MortgageLoan		2
Total scheduled maturities, loans | MortgageLoan		51
Matured as of December 31, 2021, loans | MortgageLoan		3
Reimbursement as a percentage of member's original purchase price | MortgageLoan	1	54	82
2022, Principal | $		$ 35,708,000
2023, Principal | $		32,842,000
2024, Principal | $		5,310,000
2025, Principal | $		3,741,000
2026, Principal | $		0
Thereafter, principal | $		1,216,000
Total scheduled maturities, principal | $		78,817,000
Matured as of December 31, 2021, Principal | $		2,280,000
Total principal, secured loans | $	$ 586,000	$ 81,097,000	$ 82,275,000	$ 70,660,000
2021, Percent		44.00%
2022, Percent		40.00%
2023, Percent		7.00%
2024, Percent		5.00%
2025, Percent		0.00%
Thereafter, Percent		1.00%
Total scheduled maturities, Percent		97.00%
Matured as of December 31, 2020, Percent		3.00%
Total principal, secured loans, Percent		100.00%	100.00%