Related Party Transactions (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($) ft² property	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) ft² property	Sep. 30, 2022 USD ($)	Feb. 28, 2023 USD ($)
Related Party Transaction [Line Items]
Revenues	$ 191,526	$ 183,712	$ 546,690	$ 545,768
Affiliated entities | Disposal Group, Disposed of by Sale, Not Discontinued Operations | 69-97 and 103-107 Main Street, Westport, Connecticut | SOFR
Related Party Transaction [Line Items]
Maximum principal amount					$ 600
Basis spread on loan					3.50%
Affiliated entities | Supervisory fee revenue | Third party management and other fees
Related Party Transaction [Line Items]
Revenues	200	200	700	800
Affiliated entities | Property management fee revenue | Third party management and other fees
Related Party Transaction [Line Items]
Revenues	100	100	200	200
Affiliated entities | Leased space rental
Related Party Transaction [Line Items]
Revenues	$ 100	$ 100	$ 300	$ 200
Number of properties | property	1		1
Notice period for lease cancellation (in days)			90 days
Undivided interest
Related Party Transaction [Line Items]
Area of real estate property (in square feet) | ft²	5,447		5,447
Chairman emeritus and employee | Leased space rental
Related Party Transaction [Line Items]
Percentage of lease space occupied by Chairman emeritus and employee			15.00%