Redeemable Noncontrolling Interests (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Farley Office and Retail \| Joint Venture
Redeemable Noncontrolling Interest
Equity method ownership percentage	95.00%
Capital contributions		$ 92,400
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	$ 50,267	50,002
Partnership Interest
Redeemable Noncontrolling Interest
Redemption value of redeemable Class A units	$ 650,236	$ 507,212

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The amount of capital contributed by other unit holders.

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As of the reporting date, the carrying amount of noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. The noncontrolling interest holder's ownership (or holders' ownership) may be in the form of common shares (regardless of class), limited partnership units (regardless of class), non-preferential membership interests, or any other form of common equity regardless of investee entity legal form.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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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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