Debt - Summary of Consolidated Indebtedness (Parenthetical) (Details) - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Long-term debt, gross	[1],[2]	$ 1,774,552	$ 1,805,414
Interest Rate Caps
Debt Instrument [Line Items]
Long-term debt, gross		144,300	103,800
Total Debt - Variable Rate Debt Fixed with Interest Rate Swap Agreements
Debt Instrument [Line Items]
Long-term debt, gross		$ 1,251,900	1,264,000
Core Portfolio | Variable Rate Debt
Debt Instrument [Line Items]
Basis spread on variable rate		4.53%
Fund Portfolio | Mortgages
Debt Instrument [Line Items]
Long-term debt, gross		$ 429,544	$ 426,224
Minimum | Core Portfolio | Unsecured Debt
Debt Instrument [Line Items]
Basis spread on variable rate		3.57%
Minimum | Core Portfolio | Unsecured Line of Credit [Member] | SOFR
Debt Instrument [Line Items]
Basis spread on variable rate		1.45%
Maximum | Core Portfolio | Unsecured Debt
Debt Instrument [Line Items]
Basis spread on variable rate		5.20%
Fund II | Variable Rate Debt | SOFR | Mortgages
Debt Instrument [Line Items]
Basis spread on variable rate	[3]	2.61%	2.61%
Fund II | Fund Portfolio | Mortgages
Debt Instrument [Line Items]
Long-term debt, gross		$ 137,485	$ 133,655
Fund II | Fund Portfolio | Variable Rate Debt | SOFR
Debt Instrument [Line Items]
Basis spread on variable rate		2.61%
Fund III | Fund Portfolio | Mortgages
Debt Instrument [Line Items]
Long-term debt, gross		$ 35,970	35,970
Fund III | Fund Portfolio | Variable Rate Debt | SOFR
Debt Instrument [Line Items]
Basis spread on variable rate		3.35%
Fund IV
Debt Instrument [Line Items]
Long-term debt, gross		$ 39,200	39,200
Fund IV | Fund Portfolio | Mortgages
Debt Instrument [Line Items]
Long-term debt, gross	[4]	$ 146,622	$ 146,230
Fund IV | Fund Portfolio | Variable Rate Debt | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		2.25%
Fund IV | Fund Portfolio | Variable Rate Debt | LIBOR | Mortgages
Debt Instrument [Line Items]
Basis spread on variable rate	[3],[4]	2.25%
Fund IV | Fund Portfolio | Variable Rate Debt | SOFR
Debt Instrument [Line Items]
Basis spread on variable rate		3.65%
Fund IV | Fund Portfolio | Variable Rate Debt | SOFR | Mortgages
Debt Instrument [Line Items]
Basis spread on variable rate	[3],[4]	3.65%
Fund IV | Minimum | Fund Portfolio | Variable Rate Debt | LIBOR | Mortgages
Debt Instrument [Line Items]
Basis spread on variable rate	[3],[4]		2.25%
Fund IV | Maximum | Fund Portfolio | Variable Rate Debt | LIBOR | Mortgages
Debt Instrument [Line Items]
Basis spread on variable rate	[3],[4]		3.65%
Fund V | Fund Portfolio | Variable Rate Debt | LIBOR | Mortgages
Debt Instrument [Line Items]
Basis spread on variable rate	[3]		1.85%
Fund V | Fund Portfolio | Variable Rate Debt | SOFR | Mortgages
Debt Instrument [Line Items]
Basis spread on variable rate	[3]		2.76%
Fund V | Minimum | Fund Portfolio | Variable Rate Debt | SOFR
Debt Instrument [Line Items]
Basis spread on variable rate		1.61%
Fund V | Minimum | Fund Portfolio | Variable Rate Debt | SOFR | Mortgages
Debt Instrument [Line Items]
Basis spread on variable rate	[3]	1.61%
Fund V | Maximum | Fund Portfolio | Variable Rate Debt | SOFR
Debt Instrument [Line Items]
Basis spread on variable rate		2.76%
Fund V | Maximum | Fund Portfolio | Variable Rate Debt | SOFR | Mortgages
Debt Instrument [Line Items]
Basis spread on variable rate	[3]	2.76%

[1] Includes $1,251.9 million and $1,264.0 million, respectively, of variable-rate debt that has been fixed with interest rate swap agreements as of the periods presented.

[2] Includes $144.3 million and $103.8 million, respectively, of variable-rate debt that is subject to interest cap agreements as of the periods presented.

[3] At June 30, 2023, the stated rates ranged from 4.53% for Core variable-rate debt; SOFR + 2.61% for Fund II variable-rate debt; SOFR + 3.35% for Fund III variable-rate debt; LIBOR + 2.25% to SOFR + 3.65% for Fund IV variable-rate debt; SOFR + 1.61% - SOFR + 2.76% for Fund V variable-rate debt; 3.57% - 5.20% for Core variable-rate unsecured term loans; and SOFR + 1.45% for Core variable-rate unsecured lines of credit.

[4] Includes the outstanding balance on the Fund IV secured bridge facility of $39.2 million at each of June 30, 2023 and December 31, 2022.