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Commitments and contingencies (Notes)	12 Months Ended
Commitments and contingencies (Notes)	Dec. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and contingencies	COMMITMENTS AND CONTINGENCIESEmployee retirement savings plan We have a retirement savings plan pursuant to Section 401(k) of the Code whereby our employees may contribute a portion of their compensation to their respective retirement accounts in an amount not to exceed the maximum allowed under the Code. In addition to employee contributions, we have elected to provide company discretionary profit-sharing contributions (subject to statutory limitations), which amounted to approximately $7.8 million, $8.6 million, and $8.7 million for the years ended December 31, 2024, 2023, and 2022, respectively. Employees who participate in the plan are immediately vested in their contributions and in the contributions made on their behalf by the Company. Concentration of credit risk We maintain our cash and cash equivalents at insured financial institutions. The combined account balances at each institution periodically exceed the FDIC insurance coverage of $250,000, and, as a result, there is a concentration of credit risk related to amounts in excess of FDIC insurance coverage. We have not experienced any losses to date on our invested cash. Our rental revenue is generated by a diverse array of many tenants. As of December 31, 2024, we had over 1,000 leases. The inability of any single tenant to make its lease payments is unlikely to have a severe or financially disruptive effect on our operations. Commitments As of December 31, 2024, remaining aggregate costs under contract for the construction of properties undergoing development, redevelopment, and improvements under the terms of leases approximated $1.0 billion. We expect payments for these obligations to occur over one to three years, subject to capital planning adjustments from time to time. We may have the ability to cease the construction of certain projects, which would result in the reduction of our commitments. In addition, we have letters of credit and performance obligations aggregating $29.5 million. We are committed to funding approximately $399.2 million related to our non-real estate investments. These funding commitments are primarily associated with our investments in privately held entities that report NAV and expire at various dates over the next 12 years, with a weighted-average expiration of 8.2 years as of December 31, 2024. As of December 31, 2024, the second installment payment related to the amendment of our existing ground lease agreement at the Alexandria Technology Square® Megacampus aggregating $135.0 million remained outstanding and was paid on January 14, 2025. Refer to “Operating lease agreements” in Note 5 – “Leases” to our consolidated financial statements for additional information.