Transactions with Related Parties - Summary of Transactions Between Borrowers of Partnership's MRBs and Affiliates (Details) - General Partner [Member] - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Non-partnership property administrative fee received	[1]	$ 8,000	$ 9,000	$ 26,000	$ 27,000
Investment/mortgage fees received	[2]	$ 1,349,000	$ 1,414,000	$ 4,131,000	$ 2,277,000

[1] AFCA 2 received administrative fees directly from the owners of certain properties financed by certain MRBs held by the Partnership.  These administrative fees equal 0.45% per annum of the outstanding principal balance of the MRBs. The disclosed amounts represent administrative fees received by AFCA 2 during the periods specified.

[2] AFCA 2 received placement fees in connection with the acquisition of certain MRBs, GILs, property loans and investments in unconsolidated entities.