Loans - Secured Loans Scheduled Maturities (Details) $ in Thousands		Sep. 30, 2022 USD ($) Loan	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($) Loan
Financing Receivable, Credit Quality Indicator [Line Items]
2022, Loan	[1]	3
2023, Loan		11
2024, Loan		2
2025, Loan		1
Thereafter, Loan		2
Total scheduled maturities, Loan		19
Matured at September 30, 2022, Loan	[2]	4
Total principal, secured loans, Loan		23		31
2022, Principal | $	[1]	$ 3,818
2023, Principal | $		22,058
2024, Principal | $		1,248
2025, Principal | $		9,000
Thereafter, Principal | $		12,399
Total scheduled maturities, Principal | $		48,523
Matured at September 30, 2022, Principal | $	[2]	12,730
Total principal, secured loans, Principal | $		$ 61,253	$ 63,056	$ 55,099
2022, Percent	[1]	6.00%
2023, Percent		36.00%
2024, Percent		2.00%
2025, Percent		15.00%
Thereafter, Percent		20.00%
Total scheduled maturities, Percent		79.00%
Matured at September 30, 2022, Percent	[2]	21.00%
Total principal, secured loans, Percent		100.00%
First Trust Deeds [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2022, Loan	[1]	2
2023, Loan		9
2024, Loan		2
2025, Loan		1
2026, Loan		0
Thereafter, Loan		2
Total scheduled maturities, Loan		16
Matured at September 30, 2022, Loan	[2]	4
Total principal, secured loans, Loan		20
2022, Principal | $	[1]	$ 1,879
2023, Principal | $		20,666
2024, Principal | $		1,248
2025, Principal | $		9,000
Thereafter, Principal | $		12,399
Total scheduled maturities, Principal | $		45,192
Matured at September 30, 2022, Principal | $	[2]	12,730
Total principal, secured loans, Principal | $		$ 57,922		45,992
Second Trust Deeds [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2022, Loan	[1]	1
2023, Loan		2
Total scheduled maturities, Loan		3
Total principal, secured loans, Loan		3
2022, Principal | $	[1]	$ 1,939
2023, Principal | $		1,392
Total scheduled maturities, Principal | $		3,331
Total principal, secured loans, Principal | $		$ 3,331		$ 9,107

[1] Loans scheduled to mature in 2022 after September 30.

[2] See Delinquency/Secured loans with payments in arrears below for more information on matured loans.