v3.25.4
Basis of Presentation and Significant Accounting Policies - Narrative (Details)
12 Months Ended
Dec. 31, 2025
USD ($)
property
development_site
investment
Dec. 31, 2025
USD ($)
property
development_site
investment
Dec. 31, 2025
USD ($)
property
development_site
investment
Dec. 31, 2025
USD ($)
property
reportableSegment
development_site
investment
Dec. 31, 2025
USD ($)
property
operatingSegment
development_site
investment
Dec. 31, 2024
USD ($)
property
investment
Dec. 31, 2023
USD ($)
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]              
Number of equity method investments | investment 0 0 0 0 0 0  
Lease-up properties occupancy percentage   95.00%          
Lease-up properties occupancy duration 1 year            
Conversion ratio   1          
Unrecognized tax benefits | $ $ 0 $ 0 $ 0 $ 0 $ 0 $ 0  
Number of operating segments       1 1    
Minimum | Lease Agreements              
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]              
Finite-lived intangible asset, useful life 1 year 1 year 1 year 1 year 1 year    
Maximum | Lease Agreements              
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]              
Finite-lived intangible asset, useful life 20 years 20 years 20 years 20 years 20 years    
Disposal group, disposed of by sale              
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]              
Restricted cash | $ $ 0 $ 0 $ 0 $ 0 $ 0 0  
Building and building improvements              
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]              
Depreciation of real estate | $     $ 305,800,000     $ 308,000,000.0 $ 300,100,000
Consolidated property partnerships              
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]              
Number of property partnerships 3 3 3 3 3    
Stabilized Office Properties | Washington              
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]              
Number of buildings 10 10 10 10 10    
Stabilized Office Properties | Texas              
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]              
Number of buildings 1 1 1 1 1    
Future development project | Washington              
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]              
Number of buildings | development_site 1 1 1 1 1    
Future development project | Texas              
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]              
Number of buildings | development_site 1 1 1 1 1    
Variable Interest Entity, Primary Beneficiary              
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]              
Number of VIEs 2 2 2 2 2 3