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Unconsolidated real estate joint ventures (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022
Schedule of Equity Method Investments |  |
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount | $ 6,700 |
Investments in unconsolidated real estate joint ventures | $ 37,780 | $ 38,435
Unconsolidated Real Estate Joint Venture Debt |  |
Weighted Average Interest Rate at End of Period | 3.72% |
Long-term Debt | $ 11,315,642 |
1655 and 1715 Third Street |  |
Schedule of Equity Method Investments |  |
Investments in unconsolidated real estate joint ventures | $ 11,718 | 12,996
Unconsolidated Real Estate Joint Venture Debt |  |
Equity interest percentage (in percent) | 10.00% |
1450 Research Boulevard |  |
Schedule of Equity Method Investments |  |
Investments in unconsolidated real estate joint ventures | $ 6,041 | 5,625
Unconsolidated Real Estate Joint Venture Debt |  |
Equity interest percentage (in percent) | 73.20% |
101 West Dickman Street |  |
Schedule of Equity Method Investments |  |
Investments in unconsolidated real estate joint ventures | $ 9,290 | 8,678
Unconsolidated Real Estate Joint Venture Debt |  |
Equity interest percentage (in percent) | 57.90% |
Other unconsolidated real estate joint ventures |  |
Schedule of Equity Method Investments |  |
Investments in unconsolidated real estate joint ventures | $ 10,731 | $ 11,136
1401/1413 Research Boulevard |  |
Unconsolidated Real Estate Joint Venture Debt |  |
Equity interest percentage (in percent) | 65.00% |
Secured debt maturing on 12/23/24 | 1401/1413 Research Boulevard |  |
Unconsolidated Real Estate Joint Venture Debt |  |
Maturity date | Dec. 23, 2024 |
Stated interest rate (as a percent) | 2.70% |
Weighted Average Interest Rate at End of Period | 3.31% |
Debt instrument, borrowing capacity | $ 28,500 |
Long-term Debt | $ 28,331 |
Secured debt maturing on 3/10/25 | 1655 and 1715 Third Street |  |
Unconsolidated Real Estate Joint Venture Debt |  |
Maturity date | Mar. 10, 2025 |
Stated interest rate (as a percent) | 4.50% |
Weighted Average Interest Rate at End of Period | 4.57% |
Debt instrument, borrowing capacity | $ 600,000 |
Long-term Debt | $ 599,505 |
Secured debt maturing on 11/10/26 | 101 West Dickman Street |  |
Unconsolidated Real Estate Joint Venture Debt |  |
Maturity date | Nov. 10, 2026 |
Weighted Average Interest Rate at End of Period | 7.38% |
Debt instrument, borrowing capacity | $ 26,750 |
Long-term Debt | $ 14,762 |
Secured debt maturing on 11/10/26 | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | 101 West Dickman Street |  |
Unconsolidated Real Estate Joint Venture Debt |  |
Stated interest rate (as a percent) | 1.95% |
Secured debt maturing on 12/10/26 | 1450 Research Boulevard |  |
Unconsolidated Real Estate Joint Venture Debt |  |
Maturity date | Dec. 10, 2026 |
Weighted Average Interest Rate at End of Period | 7.44% |
Debt instrument, borrowing capacity | $ 13,000 |
Long-term Debt | $ 8,280 |
Secured debt maturing on 12/10/26 | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | 1450 Research Boulevard |  |
Unconsolidated Real Estate Joint Venture Debt |  |
Stated interest rate (as a percent) | 1.95% |
Equity Method Investee |  |
Unconsolidated Real Estate Joint Venture Debt |  |
Debt instrument, borrowing capacity | $ 668,250 |
Long-term Debt | $ 650,878 |

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