Debt - Summary of Consolidated Indebtedness (Details) - USD ($) $ in Thousands			3 Months Ended	12 Months Ended
		Jul. 15, 2023	Sep. 30, 2022	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Long-term debt, gross	[1],[2]			$ 1,881,087	$ 1,805,414
Net unamortized debt issuance costs				(11,186)	(12,697)
Unamortized Premium				240	343
Secured Debt, Total				930,127	928,639
Unsecured notes payable, net				726,727	696,134
Total Indebtedness				1,870,141	1,793,060
Fund IV
Debt Instrument [Line Items]
Long-term debt, gross				36,200	$ 39,200
SOFR
Debt Instrument [Line Items]
Basis spread on variable rate		3.65%	2.61%		2.56%
Fund Portfolio | Fund III
Debt Instrument [Line Items]
Long-term debt, gross				33,000	$ 35,970
Mortgages
Debt Instrument [Line Items]
Net unamortized debt issuance costs				(7,313)	(7,621)
Unamortized Premium				240	343
Secured Debt, Total				930,127	928,639
Mortgages | Fund Portfolio | Fund II
Debt Instrument [Line Items]
Long-term debt, gross	[3]			137,485	133,655
Mortgages | Fund Portfolio | Fund IV
Debt Instrument [Line Items]
Long-term debt, gross	[4]			115,925	146,230
Mortgages | Fund Portfolio | Fund V
Debt Instrument [Line Items]
Long-term debt, gross				458,960	426,224
Unsecured Term Loan
Debt Instrument [Line Items]
Net unamortized debt issuance costs				(3,873)	(5,076)
Unsecured notes payable, net				726,727	696,134
Line of Credit
Debt Instrument [Line Items]
Unsecured notes payable, net	[5]			213,287	168,287
Fixed Rate | Mortgages | Core Portfolio
Debt Instrument [Line Items]
Long-term debt, gross				$ 191,830	$ 193,838
Fixed Rate | Mortgages | Core Portfolio | Maximum
Debt Instrument [Line Items]
Interest rate, stated percentage				5.89%	5.89%
Maturity Date				2035-04
Fixed Rate | Mortgages | Core Portfolio | Minimum
Debt Instrument [Line Items]
Interest rate, stated percentage				3.99%	3.88%
Maturity Date				2024-02
Variable Rate Debt | Mortgages | SOFR | Fund II
Debt Instrument [Line Items]
Basis spread on variable rate	[3]			2.61%	2.61%
Variable Rate Debt | Mortgages | Fund Portfolio | Fund V | Maximum
Debt Instrument [Line Items]
Maturity Date				2024-02
Variable Rate Debt | Mortgages | Fund Portfolio | LIBOR | Fund IV | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	[4]				3.65%
Maturity Date	[4]			2028-06
Variable Rate Debt | Mortgages | Fund Portfolio | LIBOR | 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 | LIBOR | Fund V
Debt Instrument [Line Items]
Basis spread on variable rate					1.85%
Variable Rate Debt | Mortgages | Fund Portfolio | LIBOR | Fund V | Maximum
Debt Instrument [Line Items]
Maturity Date				2028-06
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%
Variable Rate Debt | Mortgages | Fund Portfolio | SOFR | Fund IV | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	[4]			2.25%
Variable Rate Debt | Mortgages | Fund Portfolio | SOFR | Fund V
Debt Instrument [Line Items]
Basis spread on variable rate					2.76%
Variable Rate Debt | Mortgages | Fund Portfolio | SOFR | Fund V | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate				2.80%
Variable Rate Debt | Mortgages | Fund Portfolio | SOFR | Fund V | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate				1.61%
Variable Rate Debt | Mortgages | Variable Rate | SOFR | Fund III
Debt Instrument [Line Items]
Basis spread on variable rate				3.75%	3.35%
Maturity Date				2025-10
Subscription Line | Fund Portfolio | Fund V
Debt Instrument [Line Items]
Long-term debt, gross				$ 80,600	$ 51,200
Subscription Line | Unsecured Term Loan | Fund Portfolio | Fund V
Debt Instrument [Line Items]
Long-term debt, gross				$ 80,600	$ 51,210
Subscription Line | Unsecured Term Loan | Fund Portfolio | SOFR | Fund V
Debt Instrument [Line Items]
Interest rate, stated percentage				3.05%	1.86%
Maturity Date				2024-01
Variable Rate Unsecured Term Loans | Unsecured Term Loan | Core Portfolio
Debt Instrument [Line Items]
Long-term debt, gross	[5]			$ 650,000	$ 650,000
Variable Rate Unsecured Term Loans | Unsecured Term Loan | Core Portfolio | Maximum
Debt Instrument [Line Items]
Interest rate, stated percentage	[5]				5.11%
Maturity Date	[5]			2029-07
Variable Rate Unsecured Term Loans | Unsecured Term Loan | Core Portfolio | Minimum
Debt Instrument [Line Items]
Interest rate, stated percentage	[5]				3.74%
Maturity Date	[5]			2026-06
Variable Rate Unsecured Term Loans | Unsecured Term Loan | Core Portfolio | SOFR | Maximum
Debt Instrument [Line Items]
Interest rate, stated percentage	[5]			2.05%
Variable Rate Unsecured Term Loans | Unsecured Term Loan | Core Portfolio | SOFR | Minimum
Debt Instrument [Line Items]
Interest rate, stated percentage	[5]			1.60%
Variable Rate Unsecured Term Loans | Line of Credit | Core Portfolio | SOFR
Debt Instrument [Line Items]
Basis spread on variable rate	[5]			1.45%	1.50%
Maturity Date	[5]			2025-06

[1] Includes $1,249.8 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. The effective fixed rates ranged from 1.14% to 4.54%.

[2] Includes $151.4 million and $103.8 million, respectively, of variable-rate debt that is subject to interest cap agreements as of the periods presented. The effective fixed rates ranged from 3.0% to 5.50%.

[3] The Company has a total commitment of $198.0 million on the Fund II mortgage.

[4] Includes the outstanding balance on the Fund IV secured bridge facility of $36.2 million at December 31, 2023 and $39.2 million at December 31, 2022. The Operating Partnership has guaranteed up to $22.5 million of the Fund IV secured bridge facility (Note 9).

[5] The Company has entered into various swap agreements to effectively fix its interest costs on a portion of its Revolver and term loans at December 31, 2023 and 2022 (Note 8).