Loans - Schedule of Impaired Loans/Allowance for Loan Losses (Details) $ in Thousands		1 Months Ended	12 Months Ended
		Mar. 31, 2022 Loans	Dec. 31, 2021 USD ($) Loan		Dec. 31, 2020 USD ($) Loan
Secured Loans Designated as Impaired Loans [Abstract]
Number of loans		1	4	[1]	6	[1]
Principal			$ 2,806		$ 7,530
Recorded investment	[2]		2,852		7,896
Impaired loans without allowance			2,852		7,896
Impaired loans with allowance			0
Impaired Financing Receivable Related Allowance			$ 0
Weighted average LTV at origination			49.50%		52.50%

[1] In March 2022, one loan included in the 2021 table above with principal of approximately $586,000 paid in full, including accrued interest of approximately $37,000.

[2] Recorded investment is the sum of the principal, advances, and accrued interest receivable for financial reporting purposes.