v3.26.3
SEGMENT INFORMATION - Schedule of Unconsolidated Real Estate Ventures of Company's Reportable Segments (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Segment Reporting [Line Items]          
Investment in real estate ventures $ 306,663   $ 306,663   $ 314,326
Equity in income (loss) of real estate ventures (14,157) $ (18,183) (31,597) $ (43,526)  
Philadelphia CBD          
Segment Reporting [Line Items]          
Investment in real estate ventures 211,624   211,624   215,078
Equity in income (loss) of real estate ventures (3,249) (10,325) (7,548) (22,184)  
Mid-Atlantic Office JV          
Segment Reporting [Line Items]          
Investment in real estate ventures 10,189   10,189   10,877
Equity in income (loss) of real estate ventures (139) (168) (581) 107  
Austin, Texas          
Segment Reporting [Line Items]          
Investment in real estate ventures 67,813   67,813   71,611
Equity in income (loss) of real estate ventures (10,644) (7,510) (22,972) (20,908)  
Other          
Segment Reporting [Line Items]          
Investment in real estate ventures 17,037   17,037   $ 16,760
Equity in income (loss) of real estate ventures $ (125) $ (180) $ (496) $ (541)