Investments in Partially Owned Entities (Alexander's Inc.) (Details) - Alexander's - USD ($) $ / shares in Units, $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Equity Method Investments And Income From Equity Method Investments
Investment owned, balance, shares	1,654,068
Equity method ownership percentage	32.40%
Accounts receivable, related parties	$ 801	$ 879
Closing share price (in dollars per share)	$ 220.06
Equity method investment fair value	$ 363,994
Excess of investee's fair value over carrying amount	276,198
Excess of investee's carrying amount over equity in net assets	$ 29,972

For an unclassified balance sheet, amount of receivables arising from transactions with related parties.

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