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Organization and Ownership (Details)
 12 Months Ended
Dec. 31, 2021
ft²
redevelopmentProject
property
project
tenant
Real Estate Properties [Line Items]  
Rentable Square Feet (unaudited) 15,456,528
In-process development projects - tenant improvement  
Real Estate Properties [Line Items]  
Rentable Square Feet (unaudited) 1,604,000
Number of Projects | property 3
In-process development projects - under construction  
Real Estate Properties [Line Items]  
Rentable Square Feet (unaudited) 946,000
Number of Projects | project 2
In-process redevelopment projects - under construction  
Real Estate Properties [Line Items]  
Rentable Square Feet (unaudited) 96,000
Number of Projects | project 1
Number of redevelopment projects excluded | redevelopmentProject 2
Stabilized Office Properties  
Real Estate Properties [Line Items]  
Number of Buildings | property 120
Rentable Square Feet (unaudited) 15,456,528
Number of Tenants | tenant 422
Percentage Occupied (unaudited) 91.90%
Percentage Leased (unaudited) 93.90%
Stabilized Residential Properties  
Real Estate Properties [Line Items]  
Number of Projects | property 3
Number of Units | property 1,001
2021 Average Occupancy (unaudited) 78.00%