Loans - Schedule of Payments in Arrears Past Due Financing Receivables (Details) $ in Thousands		Sep. 30, 2021 USD ($) Loan		Dec. 31, 2020 USD ($) Loan
30-89 days (1-3 payments) [Member]
Loans (Details) - Secured Loans by Property Type [Line Items]
Number of loans | Loan	[1]	1
Number of monthly payments | Loan	[1]	1
Past maturity, principal	[1]	$ 7,994
Past maturity, interest	[1],[2]	56
Monthly payments, interest	[1],[2]	16
Total payments	[1]	$ 8,066
Past Due 90 Days Or More [Member]
Loans (Details) - Secured Loans by Property Type [Line Items]
Number of loans | Loan		4	[3]	3	[4]
Past maturity, principal		$ 6,370	[3]	$ 15,139	[4]
Past maturity, interest		228	[1],[2]	849	[4],[5]
Total payments		$ 6,598	[3]	$ 15,988	[4]
Total Payments Past Due
Loans (Details) - Secured Loans by Property Type [Line Items]
Number of loans | Loan		5		3
Number of monthly payments | Loan		1
Past maturity, principal		$ 14,364		$ 15,139
Past maturity, interest		284	[2]	849	[5]
Monthly payments, interest	[2]	16
Total payments		$ 14,664		$ 15,988

[1] One loan, with principal of approximately $7,994,000 and interest of approximately $56,000, included in past maturity payments (principal and interest) 30-89 days, was brought current and extended in October 2021. The loans new maturity date is March 2022.

[2] Interest includes foregone interest of approximately $228,000 on non-accrual loans past maturity. Interest for September 2021 is due on October 1, 2021 and is not included in the payments in arrears at September 30, 2021.

[3] One loan, with principal of approximately $5,380,000, included in past maturity payments (principal and interest) 180 or more days, had forbearance agreements in place at September 30, 2021.

[4] Two loans, with an aggregate principal of approximately $10,735,000, included in past maturity payments (principal and interest) 180 or more days, had forbearance agreements in place at December 31, 2020.

[5] Interest includes foregone interest of approximately $512,000 on non-accrual loans past maturity. Interest for December 2020 was due on January 1, 2021 and is not included in the payments in arrears at December 31, 2020.