Debt - Summary of Mortgage Debt Nonrecourse to Company and Encumbers Multifamily Properties (Parenthetical) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($)
Debt Instrument [Line Items]
Deferred financing costs, accumulated amortization	$ 5,433
Residences at Glenview Reserve and West Place
Debt Instrument [Line Items]
Mortgage loans payable description	Debt was assumed upon acquisition of this property and recorded at approximated fair value. The loan can be prepaid at the greater of par plus 1.00% of the unpaid principal balance or the product obtained by multiplying the present value of the principal being prepaid by the excess of the monthly fixed interest rate of the loan over a daily discount rate. The loan is open to pre-payment in the last three months of the term
Loan prepayment fee as a percentage of unpaid principal balance	1.00%
Debt With Fixed Interest Rate | Cornerstone
Debt Instrument [Line Items]
Interest Rate	4.09%
Fair value of debt assumed upon acquisition	$ 18,000
Debt instrument, payment terms	The assumed debt carries a 4.09% fixed rate, was originally issued in March 2013, and had a term of 120 months with an initial 24 months of interest only.
Blended pay rate	4.24%
13th month through 81st month
Debt Instrument [Line Items]
Mortgage loans payable description	Loan can be pre-paid in the first 12 months of the term at par plus 5.00%. Starting in the 13th month of the term through the 81st month of the term, the loan can be pre-paid at par plus 1.00% of the unpaid principal balance and at par during the last three months of the term.
Loan prepayment fee as a percentage of unpaid principal balance	1.00%
13th month through 81st month | Debt With Floating Interest Rate | Torreyana, Bloom and Bella Solara
Debt Instrument [Line Items]
Mortgage loans payable description	Loan can be pre-paid in the first 12 months of the term in certain circumstances at par plus 5.00%. Starting in the 13th month of the term through the 81st month of the term, the loan can be pre-paid at par plus 1.00% of the unpaid principal balance and at par during the last three months of the term.
Loan prepayment fee as a percentage of unpaid principal balance	1.00%
13th month through 81st month | Debt With Floating Interest Rate | Cedar Pointe
Debt Instrument [Line Items]
Mortgage loans payable description	Loan can be pre-paid in the first 12 months of the term in certain circumstances at par plus 5.00%.  Starting in the 13th month of the term through the 81st month of the term, the loan can be pre-paid at par plus 1.00% of the unpaid principal balance and at par during the last three months of the term.
Loan prepayment fee as a percentage of unpaid principal balance	1.00%
13th month through 81st month | Debt With Floating Interest Rate | Summers Landing
Debt Instrument [Line Items]
Mortgage loans payable description	Debt was assumed upon acquisition of this property and recorded at approximated fair value.  It can be pre-paid in the first 12 months of the term in certain circumstances at par plus 5.00%. Starting in the 13th month of the term through the 81st month of the term, the loan can be pre-paid at par plus 1.00% of the unpaid principal balance and at par during the last three months of the term.
Loan prepayment fee as a percentage of unpaid principal balance	1.00%
First 12 months
Debt Instrument [Line Items]
Loan prepayment fee as a percentage of unpaid principal balance	5.00%
First 12 months | Debt With Floating Interest Rate | Torreyana, Bloom and Bella Solara
Debt Instrument [Line Items]
Loan prepayment fee as a percentage of unpaid principal balance	5.00%
First 12 months | Debt With Floating Interest Rate | Cedar Pointe
Debt Instrument [Line Items]
Loan prepayment fee as a percentage of unpaid principal balance	5.00%
First 12 months | Debt With Floating Interest Rate | Summers Landing
Debt Instrument [Line Items]
Loan prepayment fee as a percentage of unpaid principal balance	5.00%
First Mortgage | Debt With Fixed Interest Rate | Cornerstone
Debt Instrument [Line Items]
Debt instrument, payment terms	At the time of acquisition, the principal balance of the first mortgage remained unchanged and had a remaining term of 98 months with 2 months of interest only. The first mortgage is pre-payable and subject to yield maintenance from the 13th month through August 31, 2022 and is pre-payable at par starting on September 1, 2022 until maturity.
Second Mortgage | Debt With Fixed Interest Rate | Cornerstone
Debt Instrument [Line Items]
Interest Rate	4.70%
Debt instrument, payment terms	The supplemental second mortgage is pre-payable and subject to yield maintenance from the date of issuance through August 31, 2022 and is pre-payable at par starting on September 1, 2022 until maturity.
Acquired property mortgage loan principle amount	$ 5,800
Last Four Months | Parc500
Debt Instrument [Line Items]
Mortgage loans payable description	Debt was assumed upon acquisition of this property and recorded at approximated fair value. The loan is open to pre-payment in the last four months of the term.
25th month through 36th month | Debt With Floating Interest Rate | Summers Landing
Debt Instrument [Line Items]
Mortgage loans payable description	Loan can be pre-paid in the first 24 months of the term in certain circumstances at par plus 5.00%.  Starting in the 25th month of the term through the 36th month of the term, the loan can be pre-paid at par plus 2% of the unpaid principal balance. Starting in the 37th month of the term, the loan can be pre-paid at par plus 1% of the unpaid principal balance. The loan is open to pre-payment in the last three months of the term.
Loan prepayment fee as a percentage of unpaid principal balance	2.00%
First 24 Months
Debt Instrument [Line Items]
Loan prepayment fee as a percentage of unpaid principal balance	5.00%
First 24 Months | Debt With Floating Interest Rate | Summers Landing
Debt Instrument [Line Items]
Loan prepayment fee as a percentage of unpaid principal balance	5.00%
37th month | Debt With Floating Interest Rate
Debt Instrument [Line Items]
Loan prepayment fee as a percentage of unpaid principal balance	1.00%
25th month through 36th month
Debt Instrument [Line Items]
Mortgage loans payable description	Loan can be pre-paid in the first 24 months of the term in certain circumstances at par plus 5.00%. Starting in the 25th month of the term through the 116th of the term, the loan can be pre-paid at par plus 1.00% of the unpaid principal balance and at par during the last four months of the term.
Loan prepayment fee as a percentage of unpaid principal balance	1.00%
One-month LIBOR
Debt Instrument [Line Items]
Interest Rate	0.452%
SOFR
Debt Instrument [Line Items]
Interest Rate	0.15934%