Debt - Summary of Consolidated Indebtedness (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Long-term debt, gross	[1],[2]	$ 1,707,658	$ 1,881,087
Net unamortized debt issuance costs		(12,053)	(11,186)
Unamortized premium		223	240
Secured Debt, Total		955,069	930,127
Unsecured notes payable, net		644,313	726,727
Total Indebtedness		1,695,828	1,870,141
Fund IV
Debt Instrument [Line Items]
Long-term debt, gross		36,200	36,200
Mortgages
Debt Instrument [Line Items]
Net unamortized debt issuance costs		(6,366)	(7,313)
Unamortized premium		223	240
Secured Debt, Total		955,069	930,127
Mortgages | Fund Portfolio | Fund II
Debt Instrument [Line Items]
Long-term debt, gross	[3]	137,485	137,485
Mortgages | Fund Portfolio | Fund III
Debt Instrument [Line Items]
Long-term debt, gross		33,000	33,000
Mortgages | Fund Portfolio | Fund IV
Debt Instrument [Line Items]
Long-term debt, gross	[4]	109,484	115,925
Mortgages | Fund Portfolio | Fund V
Debt Instrument [Line Items]
Long-term debt, gross		500,144	458,960
Unsecured Debt
Debt Instrument [Line Items]
Net unamortized debt issuance costs		(5,687)	(3,873)
Unsecured notes payable, net		644,313	726,727
Line of Credit
Debt Instrument [Line Items]
Unsecured notes payable, net	[5]	96,446	213,287
Fixed Rate | Mortgages | Core Portfolio
Debt Instrument [Line Items]
Long-term debt, gross		$ 181,099	191,830
Fixed Rate | Mortgages | Core Portfolio | Maximum
Debt Instrument [Line Items]
Interest rate, stated percentage		5.89%
Maturity Date		2035-04
Fixed Rate | Mortgages | Core Portfolio | Minimum
Debt Instrument [Line Items]
Interest rate, stated percentage		3.99%
Maturity Date		2027-07
Variable Rate Debt | Mortgages | SOFR | Fund II
Debt Instrument [Line Items]
Basis spread on variable rate	[3]	2.61%
Variable Rate Debt | Mortgages | Fund Portfolio | SOFR | Fund II
Debt Instrument [Line Items]
Maturity Date	[3]	2025-08
Variable Rate Debt | Mortgages | Fund Portfolio | SOFR | Fund IV | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	[4]	3.33%
Maturity Date	[4]	2028-06
Variable Rate Debt | Mortgages | Fund Portfolio | SOFR | Fund IV | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	[4]	2.25%
Maturity Date	[4]	2025-03
Variable Rate Debt | Mortgages | Fund Portfolio | SOFR | Fund V | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate		2.85%
Maturity Date		2028-06
Variable Rate Debt | Mortgages | Fund Portfolio | SOFR | Fund V | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate		1.80%
Maturity Date		2024-07
Variable Rate Debt | Mortgages | Variable Rate | SOFR | Fund III
Debt Instrument [Line Items]
Maturity Date		2025-10
Variable Rate Debt | Mortgages | Variable Rate | SOFR | Fund III | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate		3.75%
Variable Rate Unsecured Term Loans | Unsecured Debt | Core Portfolio
Debt Instrument [Line Items]
Long-term debt, gross	[5]	$ 650,000	650,000
Variable Rate Unsecured Term Loans | Unsecured Debt | Core Portfolio | Maximum
Debt Instrument [Line Items]
Maturity Date	[5]	2029-07
Variable Rate Unsecured Term Loans | Unsecured Debt | Core Portfolio | Minimum
Debt Instrument [Line Items]
Maturity Date	[5]	2027-04
Variable Rate Unsecured Term Loans | Unsecured Debt | Core Portfolio | SOFR | Maximum
Debt Instrument [Line Items]
Interest rate, stated percentage	[5]	1.95%
Variable Rate Unsecured Term Loans | Unsecured Debt | Core Portfolio | SOFR | Minimum
Debt Instrument [Line Items]
Interest rate, stated percentage	[5]	1.50%
Variable Rate Unsecured Term Loans | Line of Credit | Core Portfolio | SOFR
Debt Instrument [Line Items]
Basis spread on variable rate	[5]	1.35%
Maturity Date	[5]	2028-04
Subscription Line | Unsecured Debt | Fund Portfolio | Fund V
Debt Instrument [Line Items]
Long-term debt, gross	[6]	$ 0	$ 80,600

[1] Includes $151.2 million and $151.4 million, respectively, of variable-rate debt that is subject to interest cap agreements as of the periods presented. The effective fixed rates ranged from 4.50% to 6.00%.

[2] Includes $1,188.3 million and $1,249.8 million, respectively, of variable-rate debt that has been fixed with interest rate swap agreements as of the periods presented. The effective fixed rates ranged from 1.14% to 4.69%.

[3] The Company has a total borrowing capacity of $198.0 million on the Fund II mortgage as of both June 30, 2024 and December 31, 2023.

[4] Includes the outstanding balance on the Fund IV secured bridge facility of $36.2 million as of both June 30, 2024 and December 31, 2023.

[5] The Company has entered into various swap agreements to effectively fix its interest costs on a portion of its Revolver and term loans as of June 30, 2024 and December 31, 2023.

[6] Fund V paid off the subscription line and terminated the outstanding letters of credit during the six months ended June 30, 2024.