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Subsequent events	6 Months Ended
	Jun. 30, 2024
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS Alexandria Technology Square® ground lease amendment In July 2024, we executed an amendment to our existing ground lease agreement at the Alexandria Technology Square® mega campus aggregating 1.2 million RSF in our Cambridge submarket to extend the term by 24 years from January 1, 2065 to December 31, 2088. The amendment requires that we prepay our entire rent obligation for the extended lease term aggregating $270.0 million in two equal installments during the fourth quarter of 2024 and the first quarter of 2025. This amount will be amortized on a straight-line basis over the remaining lease term from July 2024 through December 2088, and the amended operating lease will result in an incremental annual rent expense of approximately $3.6 million. Alexandria Technology Square® is a foundational mega campus in the heart of the global life science ecosystem in Cambridge and is the Greater Boston base of operations of key strategic long-tenured tenants such as Novartis AG, GlaxoSmithKline plc, Massachusetts Institute of Technology, and Mass General Brigham. Securing this ground lease through December 2088 significantly enhances the long-term value of our investment in this critical mega campus. Unsecured senior line of credit amendment In July 2024, we executed an agreement with the lender group to amend and restate our unsecured senior line of credit to, among other changes, extend the maturity date from January 22, 2028 to January 22, 2030, including extension options that we control. We expect that the amendment and restatement will become effective in September 2024 upon the satisfaction of certain conditions.

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/855/tableOfContent

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

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