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Leases Lessee (Details) $ in Thousands, ft² in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2024 USD ($) ft² property | Mar. 31, 2024 USD ($) property | Jun. 30, 2024 | Dec. 31, 2024 USD ($) ft² property | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Lessee, Lease, Description [Line Items] |  |  |  |  |  |
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] | Other assets |  |  | Other assets | Other assets |
Operating Lease, Liability, Statement of Financial Position [Extensible List] | Accounts payable, accrued expenses, and other liabilities |  |  | Accounts payable, accrued expenses, and other liabilities | Accounts payable, accrued expenses, and other liabilities |
Operating lease liability | $ 507,127 |  |  | $ 507,127 | $ 382,883 |
Operating lease right-of-use assets | $ 764,472 |  |  | $ 764,472 | 516,452 |
Operating lease discount rate | 4.90% |  |  | 4.90% |  |
Operating lease costs - cash rents |  |  |  | $ 167,800 | 32,200 | $ 55,200
Number of Properties Subject to Ground Leases | property | 32 |  |  | 32 |  |
Percentage of Properties Subject to Ground Leases | 8.00% |  |  | 8.00% |  |
Remaining lease term for operating lease obligations |  |  |  | 12 years |  |
Operating Lease Liabilities, Payment Due |  |  |  |  |  |
2025 | $ 157,887 |  |  | $ 157,887 |  |
2026 | 23,081 |  |  | 23,081 |  |
2027 | 22,162 |  |  | 22,162 |  |
2028 | 21,830 |  |  | 21,830 |  |
2029 | 21,338 |  |  | 21,338 |  |
Thereafter | 703,148 |  |  | 703,148 |  |
Total future payments under our operating leases in which we are the lessee | 949,446 |  |  | 949,446 |  |
Effect of discounting | (442,319) |  |  | (442,319) |  |
Operating lease liability | 507,127 |  |  | 507,127 | 382,883 |
Lessee operating costs |  |  |  |  |  |
Gross operating lease costs |  |  |  | 40,740 | 39,879 | 36,527
Capitalized lease costs |  |  |  | (1,780) | (5,544) | (3,661)
Expenses for operating leases in which we are lessee |  |  |  | 38,960 | $ 34,335 | $ 32,866
Alexandria Technology Square |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |
Operating lease liability | $ 134,300 |  |  | $ 134,300 |  |
Area of Real Estate Property | ft² | 1.2 |  |  | 1.2 |  |
Ground Lease Contractual Term Extension, Years |  |  |  | 24 years |  |
Lease Expiration Date | Dec. 31, 2088 |  | Jan. 01, 2065 |  |  |
Prepaid Rent | $ 270,000 |  |  | $ 270,000 |  |
Operating lease costs - cash rents | 135,000 |  |  |  |  |
Operating Lease Liabilities, Payment Due |  |  |  |  |  |
Operating lease liability | $ 134,300 |  |  | $ 134,300 |  |
San Francisco Bay Area |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |
Operating lease costs - cash rents |  | $ 26,300 |  |  |  |
Number of properties associated with lease extensions executed | property |  | 2 |  |  |  |
Minimum |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |
Remaining lease term for ground lease obligation |  |  |  | 30 years |  |
Maximum |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |
Remaining lease term for ground lease obligation |  |  |  | 82 years |  |
Ground and Operating Leases |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |
Weighted average remaining lease term | 56 years |  |  | 56 years |  |
Operating Property With Ground Lease |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |
Number of Properties Subject to Ground Leases | property | 1 |  |  | 1 |  |
Net book value for the exclusion of one ground lease related to one operating property | $ 5,600 |  |  | $ 5,600 |  |

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