Segments (Details) $ in Thousands |
12 Months Ended | ||||
|---|---|---|---|---|---|
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Dec. 31, 2025
USD ($)
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Dec. 31, 2025
reportableSegment
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Dec. 31, 2025
operatingSegment
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Dec. 31, 2024
USD ($)
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Dec. 31, 2023
USD ($)
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| Segment Reporting [Abstract] | |||||
| Number of operating segments | 1 | 1 | |||
| Number of reportable segments | reportableSegment | 1 | ||||
| Revenues: | |||||
| Rental income | $ 1,093,587 | $ 1,118,115 | $ 1,117,737 | ||
| Other property income | 19,080 | 17,514 | 11,957 | ||
| Total revenues | 1,112,667 | 1,135,629 | 1,129,694 | ||
| Expenses: | |||||
| Property expenses | 243,726 | 243,441 | 228,964 | ||
| Real estate taxes | 107,564 | 108,951 | 105,868 | ||
| Ground leases | 12,048 | 11,715 | 9,732 | ||
| General and administrative expenses | 73,108 | 71,074 | 94,264 | ||
| Leasing costs | 10,352 | 8,764 | 6,506 | ||
| Depreciation and amortization | 354,854 | 356,182 | 355,278 | ||
| Total expenses | 801,652 | 800,127 | 800,612 | ||
| Other Income (Expenses): | |||||
| Interest income | 6,970 | 37,752 | 22,592 | ||
| Interest expense | (126,292) | (145,287) | (114,216) | ||
| Other income (expense) | 168 | (992) | 830 | ||
| Gains on sales of depreciable operating properties | 127,038 | 0 | 0 | ||
| Impairment of real estate assets | 16,259 | 0 | 0 | ||
| Gain on sale of long-lived assets | 0 | 5,979 | 0 | ||
| Total other expenses | (8,375) | (102,548) | (90,794) | ||
| Net income | 302,640 | 232,954 | 238,288 | ||
| Office and Life Science Properties Segment | |||||
| Revenues: | |||||
| Rental income | 1,093,587 | 1,118,115 | 1,117,737 | ||
| Other property income | 19,080 | 17,514 | 11,957 | ||
| Total revenues | 1,112,667 | 1,135,629 | 1,129,694 | ||
| Expenses: | |||||
| Property expenses | 243,726 | 243,441 | 228,964 | ||
| Real estate taxes | 107,564 | 108,951 | 105,868 | ||
| Ground leases | 12,048 | 11,715 | 9,732 | ||
| General and administrative expenses | 73,108 | 71,074 | 94,264 | ||
| Leasing costs | 10,352 | 8,764 | 6,506 | ||
| Depreciation and amortization | 354,854 | 356,182 | 355,278 | ||
| Total expenses | 801,652 | 800,127 | 800,612 | ||
| Other Income (Expenses): | |||||
| Interest income | 6,970 | 37,752 | 22,592 | ||
| Interest expense | (126,292) | (145,287) | (114,216) | ||
| Other income (expense) | 168 | (992) | 830 | ||
| Gains on sales of depreciable operating properties | 127,038 | 0 | 0 | ||
| Impairment of real estate assets | (16,259) | 0 | 0 | ||
| Gain on sale of long-lived assets | 0 | 5,979 | 0 | ||
| Total other expenses | (8,375) | (102,548) | (90,794) | ||
| Net income | $ 302,640 | $ 232,954 | $ 238,288 | ||
| X | ||||||||||
- Definition Income derived from investments in debt and equity securities and on cash and cash equivalents and the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading. Interest income represents earnings which reflect the time value of money or transactions in which the payments are for the use or forbearance of money. Dividend income represents a distribution of earnings to shareholders by investee companies. No definition available.
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| X | ||||||||||
- Definition The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of gain (loss) on sale or disposal of intangible assets. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The charge against earnings in the period to reduce the carrying amount of real property to fair value. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of interest expense classified as nonoperating. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of operating lease expense. Excludes sublease income. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of income (expense) related to nonoperating activities, classified as other. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition A tax based on the assessed value of real estate by the local government. The tax is usually based on the value of property (including the land). Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Details
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