Organization (Details)	Mar. 31, 2025 ft² property
Real Estate Properties
Number of Properties \| property	55
Net rentable area (in square feet) \| ft²	19,277,370
Consolidated portfolio
Real Estate Properties
Number of Properties \| property	51
Net rentable area (in square feet) \| ft²	15,891,228
Consolidated portfolio \| Office
Real Estate Properties
Number of Properties \| property	42
Net rentable area (in square feet) \| ft²	12,803,718
Consolidated portfolio \| Studio
Real Estate Properties
Number of Properties \| property	4
Net rentable area (in square feet) \| ft²	1,471,268
Consolidated portfolio \| Future development
Real Estate Properties
Number of Properties \| property	5
Net rentable area (in square feet) \| ft²	1,616,242
Unconsolidated portfolio
Real Estate Properties
Number of Properties \| property	4
Net rentable area (in square feet) \| ft²	3,386,142
Unconsolidated portfolio \| Bentall Centre
Real Estate Properties
Joint venture, ownership (as a percent)	20.00%
Unconsolidated portfolio \| Sunset Waltham Cross Studios
Real Estate Properties
Joint venture, ownership (as a percent)	35.00%
Unconsolidated portfolio \| Sunset Pier 94 Studios
Real Estate Properties
Joint venture, ownership (as a percent)	51.00%
Joint venture, ownership (as a percent)	25.60%
Unconsolidated portfolio \| Office
Real Estate Properties
Number of Properties \| property	1
Net rentable area (in square feet) \| ft²	1,536,795
Unconsolidated portfolio \| Studio
Real Estate Properties
Number of Properties \| property	1
Net rentable area (in square feet) \| ft²	232,000
Unconsolidated portfolio \| Future development
Real Estate Properties
Number of Properties \| property	2
Net rentable area (in square feet) \| ft²	1,617,347