Investments in Partially Owned Entities (825 Seventh Avenue) (Details) ft² in Thousands, $ in Thousands	Jul. 24, 2023 USD ($) ft²	Jul. 23, 2023 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Schedule Of Equity Method Investments
Loans payable			$ 5,714,761	$ 5,829,018
825 Seventh Avenue | Office and Retail Building | Maturing In January 2026
Schedule Of Equity Method Investments
Loans payable	$ 54,000
Square footage of real estate property (in sqft) | ft²	173
Basis point reduction available	0.30%
825 Seventh Avenue | Office and Retail Building | Maturing In January 2026 | SOFR
Schedule Of Equity Method Investments
Basis spread on variable rate	2.75%
825 Seventh Avenue | Office and Retail Building | Maturing In July 2023
Schedule Of Equity Method Investments
Loans payable		$ 60,000
825 Seventh Avenue | Office and Retail Building | Maturing In July 2023 | LIBOR
Schedule Of Equity Method Investments
Basis spread on variable rate		2.35%
825 Seventh Avenue | Joint Venture | Maturing In January 2026
Schedule Of Equity Method Investments
Equity method ownership percentage	50.00%