Governmental Issuer Loans - Summary of Partnership's GIL Investments (Parenthetical) (Details) - Governmental Issuer Loans [Member] - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Floor Rate [Member] | Minimum [Member]
Governmental Issuer Loans [Line Items]
Interest Rate	0.00%	0.00%
Floor Rate [Member] | Maximum [Member]
Governmental Issuer Loans [Line Items]
Interest Rate	0.85%	0.85%
Poppy Grove I [Member] | Maximum [Member]
Governmental Issuer Loans [Line Items]
Partnership subordinate loan amount	$ 3.8	$ 3.8
Poppy Grove II [Member] | Maximum [Member]
Governmental Issuer Loans [Line Items]
Partnership subordinate loan amount	2.2	2.2
Poppy Grove III [Member] | Maximum [Member]
Governmental Issuer Loans [Line Items]
Partnership subordinate loan amount	$ 4.2	$ 4.2