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Consolidated and unconsolidated real estate joint ventures (Details) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2023 USD ($) ft² | Mar. 31, 2023 USD ($) ft² | Dec. 31, 2023 USD ($) ft² | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Apr. 11, 2023
Schedule of Equity Method Investments |  |  |  |  |  |
Area of Real Estate Property | ft² |  |  | 73,500,000 |  |  |
Contributions from and sales of noncontrolling interests |  |  | $ 547,391 | $ 1,542,347 | $ 2,026,486 |
Contributions from and sales of noncontrolling interests |  |  | 542,589 | 1,560,129 | 2,147,061 |
Purchase Price |  |  | 265,750 | 2,877,861 | 5,434,652 |
Contribution of assets from real estate joint venture partner |  |  | $ 33,250 | 19,146 | 118,750 |
1655 and 1715 Third Street |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Equity interest percentage (in percent) |  |  | 10.00% |  |  |
1401/1413 Research Boulevard |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Equity interest percentage (in percent) |  |  | 65.00% |  |  |
1450 Research Boulevard |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Equity interest percentage (in percent) |  |  | 73.20% |  |  |
101 West Dickman Street |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Equity interest percentage (in percent) |  |  | 57.90% |  |  |
50 and 60 Binney Street | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent |  |  | 34.00% |  |  |
75/125 Binney Street | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent |  |  | 40.00% |  |  |
100 and 225 Binney Street and 300 Third Street | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent |  |  | 30.00% |  |  |
99 Coolidge Avenue | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent |  |  | 75.00% |  |  |
15 Necco Street |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Area of Real Estate Property | ft² | 345,996 |  |  |  |  |
Contributions from and sales of noncontrolling interests | $ 66,108 |  |  |  |  |
15 Necco Street | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent |  | 90.00% | 56.70% |  |  | 72.00%
Other - Greater Boston |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Purchase Price |  | $ 58,900 |  |  |  |
Total Value of Assets Acquired |  | 37,600 |  |  |  |
Contribution of assets from real estate joint venture partner |  | $ 33,300 |  |  |  |
Other - Greater Boston | Development Entitlements Acquired |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Area of Real Estate Property | ft² |  | 515,000 |  |  |  |
Other - Greater Boston | Future development |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Area of Real Estate Property | ft² |  | 715,000 |  |  |  |
Other - Greater Boston | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent |  |  | 61.20% |  |  |
Alexandria Center for Science and Technology - Mission Bay | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent |  |  | 25.00% |  |  |
1450 Owens Street | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent |  |  | 40.60% |  |  |
601, 611, 651, 681, 685, and 701 Gateway Boulevard | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent |  |  | 50.00% |  |  |
751 Gateway Boulevard | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent |  |  | 51.00% |  |  |
211 and 213 East Grand Avenue | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent |  |  | 30.00% |  |  |
500 Forbes Boulevard | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent |  |  | 10.00% |  |  |
Alexandria Center for Life Science – Millbrae | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent |  |  | 47.10% |  |  |
3215 Merryfield Row | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent |  |  | 30.00% |  |  |
Campus Point by Alexandria | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent |  |  | 55.00% |  |  |
5200 Illumina Way | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent |  |  | 51.00% |  |  |
9625 Towne Centre Drive |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Area of Real Estate Property | ft² | 163,648 |  |  |  |  |
Contributions from and sales of noncontrolling interests | $ 32,261 |  |  |  |  |
Noncontrolling Interest, Consideration Transferred | $ 160,500 |  |  |  |  |
9625 Towne Centre Drive | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent |  | 50.10% | 30.00% |  |  |
SD Tech by Alexandria | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent |  |  | 50.00% |  |  |
Pacific Technology Park | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent |  |  | 50.00% |  |  |
Summers Ridge Science Park | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent |  |  | 30.00% |  |  |
1201 and 1208 Eastlake Avenue East and 199 East Blaine Street | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent |  |  | 30.00% |  |  |
400 Dexter Avenue North | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent |  |  | 30.00% |  |  |
800 Mercer Street | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent |  |  | 60.00% |  |  |
Noncontrolling Interests |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Contributions from and sales of noncontrolling interests |  |  | $ 508,693 | 910,506 | 1,157,668 |
Noncontrolling Interests | 15 Necco Street | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Ownership percentage by noncontrolling owners |  | 10.00% |  |  |  |
Real Estate Property, Ownership Interest Sold | 18.00% |  |  |  |  |
Noncontrolling Interests | 15 Necco Street | Alexandria | New Partner |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Real Estate Properties, Ownership Interest Acquired by Noncontrolling Interest | 20.00% |  |  |  |  |
Noncontrolling Interests | 15 Necco Street | Alexandria | New Partner | Minimum |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Ownership percentage by noncontrolling owners |  |  |  |  |  | 20.00%
Noncontrolling Interests | 15 Necco Street | Alexandria | New Partner | Maximum |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Ownership percentage by noncontrolling owners | 37.00% |  |  |  |  |
Noncontrolling Interests | 15 Necco Street | Alexandria | Existing Partner |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Ownership percentage by noncontrolling owners |  |  |  |  |  | 8.00%
Real Estate Property, Ownership Interest Sold by Noncontrolling Interests | 2.00% |  |  |  |  |
Noncontrolling Interests | Other - Greater Boston | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Ownership percentage by noncontrolling owners |  | 38.80% |  |  |  |
Noncontrolling Interests | 1450 Owens Street | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Ownership percentage by noncontrolling owners |  |  | 75.00% |  |  |
Noncontrolling Interests | 9625 Towne Centre Drive | Alexandria |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Ownership percentage by noncontrolling owners |  | 49.90% |  |  |  |
Real Estate Property, Ownership Interest Sold | 20.10% |  |  |  |  |
Noncontrolling Interests | 9625 Towne Centre Drive | Alexandria | New Partner |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Ownership percentage by noncontrolling owners | 70.00% |  |  |  |  |
Noncontrolling Interests | 9625 Towne Centre Drive | Alexandria | Previous Partner |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Real Estate Property, Ownership Interest Sold by Noncontrolling Interests | 49.90% |  |  |  |  |
Additional Paid-In Capital |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Contributions from and sales of noncontrolling interests |  |  | $ 33,896 | 649,623 | 989,393 |
Additional Paid-In Capital | 15 Necco Street |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Contributions from and sales of noncontrolling interests | $ (7,761) |  |  |  |  |
Additional Paid-In Capital | 9625 Towne Centre Drive |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Contributions from and sales of noncontrolling interests | $ 15,553 |  |  |  |  |
Redeemable Noncontrolling Interests |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Contributions from and sales of noncontrolling interests |  |  | $ 35,250 | $ 0 | $ 282 |
Redeemable Noncontrolling Interests | Other - Greater Boston |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |
Contributions from and sales of noncontrolling interests |  | $ 35,300 |  |  |  |

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