Investments in Unconsolidated Entities - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Jan. 31, 2020
Vantage At Westover Hills [Member]
Schedule Of Equity Method Investments [Line Items]
Equity commitment of fund construction		$ 7.3
Minimum [Member] | ATAX Vantage Holdings, LLC [Member]
Schedule Of Equity Method Investments [Line Items]
Return on investment period	2 years
Maximum [Member] | ATAX Vantage Holdings, LLC [Member]
Schedule Of Equity Method Investments [Line Items]
Return on investment period	3 years