Organization and Ownership - Operating Properties (Details)	12 Months Ended
	Dec. 31, 2023 ft² development_project tenant building property
Real Estate Properties [Line Items]
Rentable Square Feet (unaudited)	17,044,128
Stabilized Office Properties
Real Estate Properties [Line Items]
Number of Buildings | building	121
Rentable Square Feet (unaudited)	17,044,128
Number of Tenants | tenant	410
Percentage Occupied (unaudited)	85.00%
Percentage Leased (unaudited)	86.40%
Stabilized Residential Properties
Real Estate Properties [Line Items]
Number of Projects | property	3
Number of Units | property	1,001
2023 Average Occupancy (unaudited)	92.80%
In-process development projects - under construction
Real Estate Properties [Line Items]
Rentable Square Feet (unaudited)	875,000
Number of Projects | development_project	1
In-process redevelopment projects - under construction
Real Estate Properties [Line Items]
Rentable Square Feet (unaudited)	100,000
Number of Projects | development_project	2