Loans - Secured Loans Summarized by Payment Delinquency (Details) $ in Thousands	Sep. 30, 2022 USD ($) MortgageLoan	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($) MortgageLoan Loan
Loans (Details) - Secured Loans by Property Type [Line Items]
Delinquent loans, number | MortgageLoan	23		31
Principal	$ 61,253	$ 63,056	$ 55,099
Current [Member]
Loans (Details) - Secured Loans by Property Type [Line Items]
Delinquent loans, number | MortgageLoan	17		25
Principal	$ 46,644		$ 48,274
Past Due 30-89 Days [Member]
Loans (Details) - Secured Loans by Property Type [Line Items]
Delinquent loans, number | MortgageLoan	2		2
Principal	$ 8,904		$ 5,782
Past Due 90-179 Days [Member]
Loans (Details) - Secured Loans by Property Type [Line Items]
Delinquent loans, number	3		1
Principal	$ 1,985		$ 56
Past Due 180 Days or More [Member]
Loans (Details) - Secured Loans by Property Type [Line Items]
Delinquent loans, number | MortgageLoan	1		3
Principal	$ 3,720		$ 987
Past Due [Member]
Loans (Details) - Secured Loans by Property Type [Line Items]
Delinquent loans, number | MortgageLoan	6		6
Principal	$ 14,609		$ 6,825