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Consolidated and unconsolidated real estate joint ventures - Unconsolidated real estate joint ventures (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2023 | Dec. 31, 2022
Schedule of Equity Method Investments |  |
Investments in unconsolidated real estate joint ventures | $ 37,695 | $ 38,435
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount | $ 6,700 |
Unconsolidated Real Estate Joint Ventures Debt |  |
Interest Rate | 3.70% |
Debt Balance at 100% | $ 11,202,835 |
Equity Method Investment, Nonconsolidated Investee or Group of Investees |  |
Unconsolidated Real Estate Joint Ventures Debt |  |
Debt instrument, borrowing capacity | 668,250 |
Debt Balance at 100% | $ 649,401 |
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate |  |
Unconsolidated Real Estate Joint Ventures Debt |  |
Fixed SOFR floor rate | 0.75% |
1655 and 1725 Third Street |  |
Schedule of Equity Method Investments |  |
Investments in unconsolidated real estate joint ventures | $ 11,929 | 12,996
Equity Method Investment, Ownership Percentage | 10.00% |
1450 Research Boulevard |  |
Schedule of Equity Method Investments |  |
Investments in unconsolidated real estate joint ventures | $ 5,935 | 5,625
Equity Method Investment, Ownership Percentage | 73.20% |
101 West Dickman Street |  |
Schedule of Equity Method Investments |  |
Investments in unconsolidated real estate joint ventures | $ 9,006 | 8,678
Equity Method Investment, Ownership Percentage | 57.90% |
Other unconsolidated real estate joint ventures |  |
Schedule of Equity Method Investments |  |
Investments in unconsolidated real estate joint ventures | $ 10,825 | $ 11,136
1401/1413 Research Boulevard |  |
Schedule of Equity Method Investments |  |
Equity Method Investment, Ownership Percentage | 65.00% |
Secured debt maturing on 12/23/24 | 1401/1413 Research Boulevard |  |
Unconsolidated Real Estate Joint Ventures Debt |  |
Maturity Date | Dec. 23, 2024 |
Stated interest rate (as a percent) | 2.70% |
Interest Rate | 3.31% |
Debt instrument, borrowing capacity | $ 28,500 |
Debt Balance at 100% | $ 28,288 |
Secured debt maturing on 3/10/25 | 1655 and 1725 Third Street |  |
Unconsolidated Real Estate Joint Ventures Debt |  |
Maturity Date | Mar. 10, 2025 |
Stated interest rate (as a percent) | 4.50% |
Interest Rate | 4.57% |
Debt instrument, borrowing capacity | $ 600,000 |
Debt Balance at 100% | $ 599,399 |
Secured debt maturing on 11/10/26 | 101 West Dickman Street |  |
Unconsolidated Real Estate Joint Ventures Debt |  |
Maturity Date | Nov. 10, 2026 |
Interest Rate | 7.37% |
Debt instrument, borrowing capacity | $ 26,750 |
Debt Balance at 100% | $ 13,949 |
Secured debt maturing on 11/10/26 | 101 West Dickman Street | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate |  |
Unconsolidated Real Estate Joint Ventures Debt |  |
Stated interest rate (as a percent) | 1.95% |
Secured debt maturing on 12/10/26 | 1450 Research Boulevard |  |
Unconsolidated Real Estate Joint Ventures Debt |  |
Maturity Date | Dec. 10, 2026 |
Interest Rate | 7.43% |
Debt instrument, borrowing capacity | $ 13,000 |
Debt Balance at 100% | $ 7,765 |
Secured debt maturing on 12/10/26 | 1450 Research Boulevard | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate |  |
Unconsolidated Real Estate Joint Ventures Debt |  |
Stated interest rate (as a percent) | 1.95% |

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