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Organization, Ownership, and Basis of Presentation - Additional Information (Details)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2025
USD ($)
a
property
variableInterestEntity
property_partnership
development_site
entity
Dec. 31, 2024
USD ($)
variableInterestEntity
entity
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]    
Lease-up properties occupancy percentage 95.00%  
Lease-up properties, period from the date of cessation of major base building construction activities 1 year  
Number of properties held for sale | property 0  
Entity established to facilitate potential Section 1031 Exchange | entity 1 1
Assets $ 10,878,685 $ 10,898,357
Liabilities 5,298,700 5,289,488
Noncontrolling interest in VIE $ 171,415 $ 174,351
Variable Interest Entity, Primary Beneficiary    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]    
Number of VIEs | variableInterestEntity 3 3
Assets $ 430,900 $ 435,500
Liabilities 20,700 18,000
Variable Interest Entity, Primary Beneficiary | Real Estate Investment    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]    
Assets $ 353,000 $ 357,300
Operating Partnership    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]    
Ownership interest (percent) 99.00% 99.00%
Operating Partnership | Non-Affiliated Investors and Former Executive Officer and Director    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]    
Ownership interest (percent) 1.00% 1.00%
101 First LLC and 303 Second LLC | Variable Interest Entity, Primary Beneficiary    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]    
Noncontrolling interest in VIE $ 166,400 $ 169,400
Future Development Site    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]    
Number of future development sites | development_site 8  
Area of undeveloped land | a 64  
Stabilized Office Properties | Washington    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]    
Number of properties | property 10  
Stabilized Office Properties | Texas    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]    
Number of properties | property 1  
Future Development Project | Washington    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]    
Number of properties | development_site 1  
Future Development Project | Texas    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]    
Number of properties | development_site 1  
Properties And Development Projects    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]    
Property ownership percentage 100.00%  
Office Properties Owned By Consolidated Property Partnerships    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]    
Number of properties | property 4  
Consolidated Property Partnerships    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]    
Number of property partnerships | property_partnership 3