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The amount of capital contributed by other unit holders.

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The fair value of shares that would be issued, determined under the conditions specified in the contract if the settlement were to occur at the reporting date.

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Redeemable Noncontrolling Interests (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Dec. 31, 2020
Farley Office and Retail \| Joint Venture
Redeemable Noncontrolling Interest
Equity method ownership percentage	95.00%
Capital contributions	$ 92,400		$ 92,400
Partnership Interest
Redeemable Noncontrolling Interest
Redemption value of redeemable class A units	411,640	$ 345,157
Partnership Interest \| Class A Units
Redeemable Noncontrolling Interest
Redemption value of redeemable class A units	383,907	300,015
Cumulative Redeemable Preferred Unit
Redeemable Noncontrolling Interest
Fair value of series G-1 through G-4 convertible preferred units and series D-13 cumulative redeemable preferred units	$ 49,383	$ 49,383