Subsequent Events - Summary of Gross Principal and Initial Terms of TOB Trusts (Details) - USD ($)	1 Months Ended
	Apr. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Outstanding TOB Trust Financing		$ 500,385,429	$ 536,197,421
TOB Trust [Member] | Mizuho Capital Markets [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Outstanding TOB Trust Financing	$ 55,386,000
TOB Trust [Member] | Mizuho Capital Markets [Member] | Avistar at Copperfield - Series A [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Outstanding TOB Trust Financing	$ 11,818,000
Stated Maturities	2021-05
Reset Frequency	Weekly
SIFMA Based Rates	0.42%
Facility Fees	1.66%
Interest rate	2.08%
TOB Trust [Member] | Mizuho Capital Markets [Member] | Avistar at Wilcrest - Series A [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Outstanding TOB Trust Financing	$ 4,479,000
Stated Maturities	2021-05
Reset Frequency	Weekly
SIFMA Based Rates	0.42%
Facility Fees	1.66%
Interest rate	2.08%
TOB Trust [Member] | Mizuho Capital Markets [Member] | Avistar at Wood Hollow - Series A [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Outstanding TOB Trust Financing	$ 34,007,000
Stated Maturities	2021-05
Reset Frequency	Weekly
SIFMA Based Rates	0.42%
Facility Fees	1.66%
Interest rate	2.08%
TOB Trust [Member] | Mizuho Capital Markets [Member] | Gateway Village [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Outstanding TOB Trust Financing	$ 2,184,000
Stated Maturities	2021-05
Reset Frequency	Weekly
SIFMA Based Rates	0.42%
Facility Fees	1.66%
Interest rate	2.08%
TOB Trust [Member] | Mizuho Capital Markets [Member] | Lynnhaven [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Outstanding TOB Trust Financing	$ 2,898,000
Stated Maturities	2021-05
Reset Frequency	Weekly
SIFMA Based Rates	0.42%
Facility Fees	1.66%
Interest rate	2.08%