Notes Payable and Unsecured Credit Facilities - Additional Information (Details) $ in Thousands	Aug. 18, 2023 USD ($) Property	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Debt Instrument [Line Items]
Long-term Debt		$ 4,069,093	$ 3,726,754
Debt discount (premium)		$ 32,239
UBP [Member] | Fixed Rate Debt [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 130,000
Debt discount (premium)	$ 13,600
Number of operating Properties | Property	11
UBP [Member] | Fixed Rate Debt [Member] | Minimum [Member]
Debt Instrument [Line Items]
Scheduled maturity date	2023-11
Debt instrument, effective fixed interest rate	3.50%
UBP [Member] | Fixed Rate Debt [Member] | Maximum [Member]
Debt Instrument [Line Items]
Scheduled maturity date	2037-06
Debt instrument, effective fixed interest rate	5.60%
UBP [Member] | Variable Rate Debt [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 154,700
Debt discount (premium)	$ (1,100)
Number of operating Properties | Property	9
UBP [Member] | Variable Rate Debt [Member] | Minimum [Member]
Debt Instrument [Line Items]
Scheduled maturity date	2024-08
Debt instrument, effective fixed interest rate	3.10%
UBP [Member] | Variable Rate Debt [Member] | Maximum [Member]
Debt Instrument [Line Items]
Scheduled maturity date	2032-01
Debt instrument, effective fixed interest rate	4.80%