Debt Financing - Summary of MRBs Redeemed and Class A Certificates Redeemed Upon Redemption (Details) - Mortgage Revenue Bonds [Member] - TEBS Financings [Member]	12 Months Ended
	Dec. 31, 2018 USD ($)
Lake Forest [Member] | M24 TEBS [Member]
Debt Instrument Redemption [Line Items]
Paydown Applied	$ 8,122,000
Bella Vista [Member] | M24 TEBS [Member]
Debt Instrument Redemption [Line Items]
Paydown Applied	5,076,000
Vantage at Judson - Series B [Member] | M33 TEBS [Member]
Debt Instrument Redemption [Line Items]
Paydown Applied	$ 25,908,568