Subsequent Event	3 Months Ended
Mar. 31, 2022
Subsequent Events [Abstract]
Subsequent Event	Subsequent EventOn April 27, 2022, we entered into an agreement to sell the Center Building, an eight-story 498,000 square foot office building located at 33‑00 Northern Boulevard in Long Island City, New York, for $172,750,000. We expect to close the sale in the third quarter of 2022 and recognize a financial statement gain of approximately $15,000,000 and a tax gain of approximately $74,000,000. The sale is subject to customary closing conditions.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662

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