v3.26.3
SEGMENT INFORMATION - Schedule of Real Estate Investments, at Cost of Company's Reportable Segments (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Segment Reporting [Line Items]    
Operating properties $ 3,300,851 $ 3,753,780
Prepaid ground leases, net 6,944 51,399
Right of use asset - operating leases, net 12,145 17,806
Construction-in-progress 82,518 118,543
Land held for development 80,403 70,405
Prepaid leasehold interests in land held for development, net 27,762 27,762
Continuing Operations    
Segment Reporting [Line Items]    
Operating properties 3,300,851 3,753,780
Total Core Segments | Continuing Operations    
Segment Reporting [Line Items]    
Operating properties 3,156,886 3,473,468
Philadelphia CBD | Continuing Operations    
Segment Reporting [Line Items]    
Operating properties 1,879,959 2,080,220
Pennsylvania Suburbs | Continuing Operations    
Segment Reporting [Line Items]    
Operating properties 885,553 883,218
Austin, Texas | Continuing Operations    
Segment Reporting [Line Items]    
Operating properties 391,374 510,030
Other | Continuing Operations    
Segment Reporting [Line Items]    
Operating properties $ 143,965 $ 280,312