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Schedule III - Real Estate and Accumulated Depreciation (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Initial Cost |  |  |  |
Encumbrances | $ 245,000 |  |  |
Land | 358,066 |  |  |
Buildings and Improvements | 2,520,935 |  |  |
Net Improvements (Retirements) Since Acquisition | 663,128 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 394,669 |  |  |
Buildings and Improvements | 3,147,563 |  |  |
Total | 3,542,232 | $ 3,617,240 | $ 3,472,602 | $ 3,474,109
Accumulated Depreciation at December 31, 2023 | 1,131,792 | $ 1,063,060 | $ 957,450 | $ 896,561
PENNSYLVANIA SUBURBS | Six Tower Bridge (181 Washington Street) |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 6,927 |  |  |
Buildings and Improvements | 14,722 |  |  |
Net Improvements (Retirements) Since Acquisition | 1,330 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 6,237 |  |  |
Buildings and Improvements | 16,742 |  |  |
Total | 22,979 |  |  |
Accumulated Depreciation at December 31, 2023 | 5,108 |  |  |
PENNSYLVANIA SUBURBS | 426 Lancaster Avenue |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 1,689 |  |  |
Buildings and Improvements | 6,756 |  |  |
Net Improvements (Retirements) Since Acquisition | 9,405 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 1,686 |  |  |
Buildings and Improvements | 16,164 |  |  |
Total | 17,850 |  |  |
Accumulated Depreciation at December 31, 2023 | 3,841 |  |  |
PENNSYLVANIA SUBURBS | 640 Freedom Business Center |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 1,015 |  |  |
Buildings and Improvements | 20,098 |  |  |
Net Improvements (Retirements) Since Acquisition | 4,762 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 305 |  |  |
Buildings and Improvements | 25,570 |  |  |
Total | 25,875 |  |  |
Accumulated Depreciation at December 31, 2023 | 17,737 |  |  |
PENNSYLVANIA SUBURBS | 620 Freedom Business Center |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 666 |  |  |
Buildings and Improvements | 13,118 |  |  |
Net Improvements (Retirements) Since Acquisition | 3,160 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 199 |  |  |
Buildings and Improvements | 16,745 |  |  |
Total | 16,944 |  |  |
Accumulated Depreciation at December 31, 2023 | 10,756 |  |  |
PENNSYLVANIA SUBURBS | 1000 First Avenue |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 0 |  |  |
Buildings and Improvements | 13,708 |  |  |
Net Improvements (Retirements) Since Acquisition | 3,345 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 0 |  |  |
Buildings and Improvements | 17,053 |  |  |
Total | 17,053 |  |  |
Accumulated Depreciation at December 31, 2023 | 13,278 |  |  |
PENNSYLVANIA SUBURBS | 1060 First Avenue |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 0 |  |  |
Buildings and Improvements | 13,665 |  |  |
Net Improvements (Retirements) Since Acquisition | 4,134 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 0 |  |  |
Buildings and Improvements | 17,799 |  |  |
Total | 17,799 |  |  |
Accumulated Depreciation at December 31, 2023 | 13,769 |  |  |
PENNSYLVANIA SUBURBS | 630 Freedom Business Center Drive |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 666 |  |  |
Buildings and Improvements | 13,251 |  |  |
Net Improvements (Retirements) Since Acquisition | 3,182 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 201 |  |  |
Buildings and Improvements | 16,898 |  |  |
Total | 17,099 |  |  |
Accumulated Depreciation at December 31, 2023 | 11,422 |  |  |
PENNSYLVANIA SUBURBS | 1020 First Avenue |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 0 |  |  |
Buildings and Improvements | 10,744 |  |  |
Net Improvements (Retirements) Since Acquisition | 4,544 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 0 |  |  |
Buildings and Improvements | 15,288 |  |  |
Total | 15,288 |  |  |
Accumulated Depreciation at December 31, 2023 | 11,736 |  |  |
PENNSYLVANIA SUBURBS | 1040 First Avenue |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 0 |  |  |
Buildings and Improvements | 14,142 |  |  |
Net Improvements (Retirements) Since Acquisition | 5,065 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 0 |  |  |
Buildings and Improvements | 19,207 |  |  |
Total | 19,207 |  |  |
Accumulated Depreciation at December 31, 2023 | 14,973 |  |  |
PENNSYLVANIA SUBURBS | 610 Freedom Business Center Drive |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 485 |  |  |
Buildings and Improvements | 9,602 |  |  |
Net Improvements (Retirements) Since Acquisition | 1,615 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 146 |  |  |
Buildings and Improvements | 11,556 |  |  |
Total | 11,702 |  |  |
Accumulated Depreciation at December 31, 2023 | 8,089 |  |  |
PENNSYLVANIA SUBURBS | 650 Park Avenue |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 1,916 |  |  |
Buildings and Improvements | 4,378 |  |  |
Net Improvements (Retirements) Since Acquisition | (4,378) |  |  |
Gross Amount Which Carried |  |  |  |
Land | 1,916 |  |  |
Buildings and Improvements | 0 |  |  |
Total | 1,916 |  |  |
Accumulated Depreciation at December 31, 2023 | 0 |  |  |
PENNSYLVANIA SUBURBS | 600 Park Avenue |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 1,012 |  |  |
Buildings and Improvements | 4,048 |  |  |
Net Improvements (Retirements) Since Acquisition | 0 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 1,012 |  |  |
Buildings and Improvements | 4,048 |  |  |
Total | 5,060 |  |  |
Accumulated Depreciation at December 31, 2023 | 2,706 |  |  |
PENNSYLVANIA SUBURBS | 933 First Avenue |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 15,960 |  |  |
Land | 3,127 |  |  |
Buildings and Improvements | 20,794 |  |  |
Net Improvements (Retirements) Since Acquisition | (1,125) |  |  |
Gross Amount Which Carried |  |  |  |
Land | 3,127 |  |  |
Buildings and Improvements | 19,669 |  |  |
Total | 22,796 |  |  |
Accumulated Depreciation at December 31, 2023 | 5,692 |  |  |
PENNSYLVANIA SUBURBS | 500 North Gulph Road |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 16,121 |  |  |
Land | 1,303 |  |  |
Buildings and Improvements | 5,201 |  |  |
Net Improvements (Retirements) Since Acquisition | 21,471 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 1,303 |  |  |
Buildings and Improvements | 26,672 |  |  |
Total | 27,975 |  |  |
Accumulated Depreciation at December 31, 2023 | 5,854 |  |  |
PENNSYLVANIA SUBURBS | 401 Plymouth Road |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 6,199 |  |  |
Buildings and Improvements | 16,131 |  |  |
Net Improvements (Retirements) Since Acquisition | 15,706 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 6,199 |  |  |
Buildings and Improvements | 31,837 |  |  |
Total | 38,036 |  |  |
Accumulated Depreciation at December 31, 2023 | 16,202 |  |  |
PENNSYLVANIA SUBURBS | Metroplex (4000 Chemical Road) |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 16,055 |  |  |
Land | 4,373 |  |  |
Buildings and Improvements | 24,546 |  |  |
Net Improvements (Retirements) Since Acquisition | 5,554 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 4,373 |  |  |
Buildings and Improvements | 30,100 |  |  |
Total | 34,473 |  |  |
Accumulated Depreciation at December 31, 2023 | 11,076 |  |  |
PENNSYLVANIA SUBURBS | Metroplex II |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 0 |  |  |
Buildings and Improvements | 0 |  |  |
Net Improvements (Retirements) Since Acquisition | 569 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 0 |  |  |
Buildings and Improvements | 569 |  |  |
Total | 569 |  |  |
Accumulated Depreciation at December 31, 2023 | 6 |  |  |
PENNSYLVANIA SUBURBS | Metroplex III |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 0 |  |  |
Buildings and Improvements | 0 |  |  |
Net Improvements (Retirements) Since Acquisition | 317 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 0 |  |  |
Buildings and Improvements | 317 |  |  |
Total | 317 |  |  |
Accumulated Depreciation at December 31, 2023 | 4 |  |  |
PENNSYLVANIA SUBURBS | 610 West Germantown Pike |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 3,651 |  |  |
Buildings and Improvements | 14,514 |  |  |
Net Improvements (Retirements) Since Acquisition | 254 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 3,051 |  |  |
Buildings and Improvements | 15,368 |  |  |
Total | 18,419 |  |  |
Accumulated Depreciation at December 31, 2023 | 7,768 |  |  |
PENNSYLVANIA SUBURBS | 600 West Germantown Pike |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 3,652 |  |  |
Buildings and Improvements | 15,288 |  |  |
Net Improvements (Retirements) Since Acquisition | (415) |  |  |
Gross Amount Which Carried |  |  |  |
Land | 3,052 |  |  |
Buildings and Improvements | 15,473 |  |  |
Total | 18,525 |  |  |
Accumulated Depreciation at December 31, 2023 | 7,992 |  |  |
PENNSYLVANIA SUBURBS | 630 West Germantown Pike |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 3,558 |  |  |
Buildings and Improvements | 14,743 |  |  |
Net Improvements (Retirements) Since Acquisition | (673) |  |  |
Gross Amount Which Carried |  |  |  |
Land | 2,973 |  |  |
Buildings and Improvements | 14,655 |  |  |
Total | 17,628 |  |  |
Accumulated Depreciation at December 31, 2023 | 7,757 |  |  |
PENNSYLVANIA SUBURBS | 620 West Germantown Pike |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 3,572 |  |  |
Buildings and Improvements | 14,435 |  |  |
Net Improvements (Retirements) Since Acquisition | 1,156 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 2,985 |  |  |
Buildings and Improvements | 16,178 |  |  |
Total | 19,163 |  |  |
Accumulated Depreciation at December 31, 2023 | 7,802 |  |  |
PENNSYLVANIA SUBURBS | 660 West Germantown Pike |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 3,694 |  |  |
Buildings and Improvements | 5,487 |  |  |
Net Improvements (Retirements) Since Acquisition | 14,871 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 4,517 |  |  |
Buildings and Improvements | 19,535 |  |  |
Total | 24,052 |  |  |
Accumulated Depreciation at December 31, 2023 | 7,784 |  |  |
PENNSYLVANIA SUBURBS | 351 Plymouth Road |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 1,043 |  |  |
Buildings and Improvements | 555 |  |  |
Net Improvements (Retirements) Since Acquisition | 0 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 1,043 |  |  |
Buildings and Improvements | 555 |  |  |
Total | 1,598 |  |  |
Accumulated Depreciation at December 31, 2023 | 260 |  |  |
PENNSYLVANIA SUBURBS | 150 Radnor Chester Road |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 11,925 |  |  |
Buildings and Improvements | 36,986 |  |  |
Net Improvements (Retirements) Since Acquisition | 22,327 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 11,897 |  |  |
Buildings and Improvements | 59,341 |  |  |
Total | 71,238 |  |  |
Accumulated Depreciation at December 31, 2023 | 30,253 |  |  |
PENNSYLVANIA SUBURBS | One Radnor Corporate Center |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 7,323 |  |  |
Buildings and Improvements | 28,613 |  |  |
Net Improvements (Retirements) Since Acquisition | 4,133 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 7,323 |  |  |
Buildings and Improvements | 32,746 |  |  |
Total | 40,069 |  |  |
Accumulated Depreciation at December 31, 2023 | 19,410 |  |  |
PENNSYLVANIA SUBURBS | 201 King of Prussia Road |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 8,956 |  |  |
Buildings and Improvements | 29,811 |  |  |
Net Improvements (Retirements) Since Acquisition | 4,939 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 8,949 |  |  |
Buildings and Improvements | 34,757 |  |  |
Total | 43,706 |  |  |
Accumulated Depreciation at December 31, 2023 | 24,432 |  |  |
PENNSYLVANIA SUBURBS | 555 Lancaster Avenue |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 8,014 |  |  |
Buildings and Improvements | 16,508 |  |  |
Net Improvements (Retirements) Since Acquisition | 12,652 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 8,609 |  |  |
Buildings and Improvements | 28,565 |  |  |
Total | 37,174 |  |  |
Accumulated Depreciation at December 31, 2023 | 10,733 |  |  |
PENNSYLVANIA SUBURBS | Four Radnor Corporate Center |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 5,406 |  |  |
Buildings and Improvements | 21,390 |  |  |
Net Improvements (Retirements) Since Acquisition | 6,719 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 5,705 |  |  |
Buildings and Improvements | 27,810 |  |  |
Total | 33,515 |  |  |
Accumulated Depreciation at December 31, 2023 | 16,857 |  |  |
PENNSYLVANIA SUBURBS | Five Radnor Corporate Center |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 6,506 |  |  |
Buildings and Improvements | 25,525 |  |  |
Net Improvements (Retirements) Since Acquisition | 9,676 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 6,578 |  |  |
Buildings and Improvements | 35,129 |  |  |
Total | 41,707 |  |  |
Accumulated Depreciation at December 31, 2023 | 17,511 |  |  |
PENNSYLVANIA SUBURBS | Three Radnor Corporate Center |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 4,773 |  |  |
Buildings and Improvements | 17,961 |  |  |
Net Improvements (Retirements) Since Acquisition | 2,740 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 4,791 |  |  |
Buildings and Improvements | 20,683 |  |  |
Total | 25,474 |  |  |
Accumulated Depreciation at December 31, 2023 | 12,840 |  |  |
PENNSYLVANIA SUBURBS | Two Radnor Corporate Center |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 3,937 |  |  |
Buildings and Improvements | 15,484 |  |  |
Net Improvements (Retirements) Since Acquisition | 5,195 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 3,942 |  |  |
Buildings and Improvements | 20,674 |  |  |
Total | 24,616 |  |  |
Accumulated Depreciation at December 31, 2023 | 11,281 |  |  |
PENNSYLVANIA SUBURBS | 130 Radnor Chester Road |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 2,573 |  |  |
Buildings and Improvements | 8,338 |  |  |
Net Improvements (Retirements) Since Acquisition | (258) |  |  |
Gross Amount Which Carried |  |  |  |
Land | 2,567 |  |  |
Buildings and Improvements | 8,086 |  |  |
Total | 10,653 |  |  |
Accumulated Depreciation at December 31, 2023 | 4,324 |  |  |
PENNSYLVANIA SUBURBS | 170 Radnor Chester Road |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 2,514 |  |  |
Buildings and Improvements | 8,147 |  |  |
Net Improvements (Retirements) Since Acquisition | 2,344 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 2,509 |  |  |
Buildings and Improvements | 10,496 |  |  |
Total | 13,005 |  |  |
Accumulated Depreciation at December 31, 2023 | 5,860 |  |  |
PENNSYLVANIA SUBURBS | 101 West Elm Street |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 6,251 |  |  |
Buildings and Improvements | 25,209 |  |  |
Net Improvements (Retirements) Since Acquisition | 2,600 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 6,251 |  |  |
Buildings and Improvements | 27,809 |  |  |
Total | 34,060 |  |  |
Accumulated Depreciation at December 31, 2023 | 13,040 |  |  |
PENNSYLVANIA SUBURBS | 1 West Elm Street |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 3,557 |  |  |
Buildings and Improvements | 14,249 |  |  |
Net Improvements (Retirements) Since Acquisition | 9,139 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 3,557 |  |  |
Buildings and Improvements | 23,388 |  |  |
Total | 26,945 |  |  |
Accumulated Depreciation at December 31, 2023 | 8,417 |  |  |
PENNSYLVANIA SUBURBS | 250 King of Prussia Road |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 0 |  |  |
Buildings and Improvements | 20,566 |  |  |
Net Improvements (Retirements) Since Acquisition | 65,182 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 11,200 |  |  |
Buildings and Improvements | 74,548 |  |  |
Total | 85,748 |  |  |
Accumulated Depreciation at December 31, 2023 | 4,666 |  |  |
PHILADELPHIA CBD | 3001-3003 JFK Boulevard |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 0 |  |  |
Buildings and Improvements | 0 |  |  |
Net Improvements (Retirements) Since Acquisition | 85 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 0 |  |  |
Buildings and Improvements | 85 |  |  |
Total | 85 |  |  |
Accumulated Depreciation at December 31, 2023 | 38 |  |  |
PHILADELPHIA CBD | Cira Centre (2929 Arch Street) |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 0 |  |  |
Buildings and Improvements | 208,570 |  |  |
Net Improvements (Retirements) Since Acquisition | 38,189 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 12,586 |  |  |
Buildings and Improvements | 234,173 |  |  |
Total | 246,759 |  |  |
Accumulated Depreciation at December 31, 2023 | 82,593 |  |  |
PHILADELPHIA CBD | Three Logan Square (1717 Arch Street) |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 0 |  |  |
Buildings and Improvements | 98,188 |  |  |
Net Improvements (Retirements) Since Acquisition | 87,145 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 25,195 |  |  |
Buildings and Improvements | 160,138 |  |  |
Total | 185,333 |  |  |
Accumulated Depreciation at December 31, 2023 | 68,452 |  |  |
PHILADELPHIA CBD | One Logan Square (130 North 18th Street) |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 14,496 |  |  |
Buildings and Improvements | 107,736 |  |  |
Net Improvements (Retirements) Since Acquisition | 23,882 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 14,473 |  |  |
Buildings and Improvements | 131,641 |  |  |
Total | 146,114 |  |  |
Accumulated Depreciation at December 31, 2023 | 75,119 |  |  |
PHILADELPHIA CBD | Two Logan Square (100 North 18th Street) |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 16,066 |  |  |
Buildings and Improvements | 100,255 |  |  |
Net Improvements (Retirements) Since Acquisition | 34,756 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 16,066 |  |  |
Buildings and Improvements | 135,011 |  |  |
Total | 151,077 |  |  |
Accumulated Depreciation at December 31, 2023 | 67,090 |  |  |
PHILADELPHIA CBD | Cira Centre South Garage (129 South 30th Street) |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 0 |  |  |
Buildings and Improvements | 76,008 |  |  |
Net Improvements (Retirements) Since Acquisition | 26,881 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 6,549 |  |  |
Buildings and Improvements | 96,340 |  |  |
Total | 102,889 |  |  |
Accumulated Depreciation at December 31, 2023 | 30,503 |  |  |
PHILADELPHIA CBD | 1900 Market Street |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 61,703 |  |  |
Land | 7,768 |  |  |
Buildings and Improvements | 17,263 |  |  |
Net Improvements (Retirements) Since Acquisition | 61,721 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 7,768 |  |  |
Buildings and Improvements | 78,984 |  |  |
Total | 86,752 |  |  |
Accumulated Depreciation at December 31, 2023 | 35,534 |  |  |
PHILADELPHIA CBD | 3020 Market Street |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 0 |  |  |
Buildings and Improvements | 21,417 |  |  |
Net Improvements (Retirements) Since Acquisition | 6,005 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 0 |  |  |
Buildings and Improvements | 27,422 |  |  |
Total | 27,422 |  |  |
Accumulated Depreciation at December 31, 2023 | 13,339 |  |  |
PHILADELPHIA CBD | 618-634 Market Street |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 13,365 |  |  |
Buildings and Improvements | 5,791 |  |  |
Net Improvements (Retirements) Since Acquisition | 5,161 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 13,365 |  |  |
Buildings and Improvements | 10,952 |  |  |
Total | 24,317 |  |  |
Accumulated Depreciation at December 31, 2023 | 7,610 |  |  |
PHILADELPHIA CBD | FMC Tower at Cira Centre South (2929 Walnut Street) |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 0 |  |  |
Buildings and Improvements | 400,294 |  |  |
Net Improvements (Retirements) Since Acquisition | 10,819 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 0 |  |  |
Buildings and Improvements | 411,113 |  |  |
Total | 411,113 |  |  |
Accumulated Depreciation at December 31, 2023 | 100,935 |  |  |
PHILADELPHIA CBD | 2100 Market Street |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 18,827 |  |  |
Buildings and Improvements | 0 |  |  |
Net Improvements (Retirements) Since Acquisition | 6,318 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 18,854 |  |  |
Buildings and Improvements | 6,291 |  |  |
Total | 25,145 |  |  |
Accumulated Depreciation at December 31, 2023 | 2,715 |  |  |
PHILADELPHIA CBD | 1505-11 Race Street |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 3,662 |  |  |
Buildings and Improvements | 6,061 |  |  |
Net Improvements (Retirements) Since Acquisition | 8 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 3,670 |  |  |
Buildings and Improvements | 6,061 |  |  |
Total | 9,731 |  |  |
Accumulated Depreciation at December 31, 2023 | 480 |  |  |
PHILADELPHIA CBD | 3000 Market Street |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 18,924 |  |  |
Buildings and Improvements | 13,080 |  |  |
Net Improvements (Retirements) Since Acquisition | 17,349 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 18,924 |  |  |
Buildings and Improvements | 30,429 |  |  |
Total | 49,353 |  |  |
Accumulated Depreciation at December 31, 2023 | 4,739 |  |  |
PHILADELPHIA CBD | The Bulletin Building (3025 Market Street) |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 49,429 |  |  |
Land | 0 |  |  |
Buildings and Improvements | 24,377 |  |  |
Net Improvements (Retirements) Since Acquisition | 44,435 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 0 |  |  |
Buildings and Improvements | 68,812 |  |  |
Total | 68,812 |  |  |
Accumulated Depreciation at December 31, 2023 | 15,078 |  |  |
AUSTIN, TX | 401-405 Colorado Street |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 62,688 |  |  |
Land | 0 |  |  |
Buildings and Improvements | 106,828 |  |  |
Net Improvements (Retirements) Since Acquisition | 564 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 0 |  |  |
Buildings and Improvements | 107,392 |  |  |
Total | 107,392 |  |  |
Accumulated Depreciation at December 31, 2023 | 5,958 |  |  |
AUSTIN, TX | 11501 Burnet Road - Building 1 |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 3,755 |  |  |
Buildings and Improvements | 22,702 |  |  |
Net Improvements (Retirements) Since Acquisition | 4 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 3,755 |  |  |
Buildings and Improvements | 22,706 |  |  |
Total | 26,461 |  |  |
Accumulated Depreciation at December 31, 2023 | 11,689 |  |  |
AUSTIN, TX | 11501 Burnet Road - Building 2 |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 2,732 |  |  |
Buildings and Improvements | 16,305 |  |  |
Net Improvements (Retirements) Since Acquisition | 733 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 2,732 |  |  |
Buildings and Improvements | 17,038 |  |  |
Total | 19,770 |  |  |
Accumulated Depreciation at December 31, 2023 | 8,991 |  |  |
AUSTIN, TX | 11501 Burnet Road - Building 3 |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 3,688 |  |  |
Buildings and Improvements | 22,348 |  |  |
Net Improvements (Retirements) Since Acquisition | 7,118 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 3,688 |  |  |
Buildings and Improvements | 29,466 |  |  |
Total | 33,154 |  |  |
Accumulated Depreciation at December 31, 2023 | 13,671 |  |  |
AUSTIN, TX | 11501 Burnet Road - Building 4 |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 2,614 |  |  |
Buildings and Improvements | 15,740 |  |  |
Net Improvements (Retirements) Since Acquisition | 3 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 2,614 |  |  |
Buildings and Improvements | 15,743 |  |  |
Total | 18,357 |  |  |
Accumulated Depreciation at December 31, 2023 | 8,105 |  |  |
AUSTIN, TX | 11501 Burnet Road - Building 5 |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 3,689 |  |  |
Buildings and Improvements | 22,354 |  |  |
Net Improvements (Retirements) Since Acquisition | 4 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 3,689 |  |  |
Buildings and Improvements | 22,358 |  |  |
Total | 26,047 |  |  |
Accumulated Depreciation at December 31, 2023 | 11,511 |  |  |
AUSTIN, TX | 11501 Burnet Road - Building 6 |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 2,676 |  |  |
Buildings and Improvements | 15,972 |  |  |
Net Improvements (Retirements) Since Acquisition | 14,114 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 2,676 |  |  |
Buildings and Improvements | 30,086 |  |  |
Total | 32,762 |  |  |
Accumulated Depreciation at December 31, 2023 | 16,346 |  |  |
AUSTIN, TX | 11501 Burnet Road - Building 8 |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 1,400 |  |  |
Buildings and Improvements | 7,422 |  |  |
Net Improvements (Retirements) Since Acquisition | 1,776 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 1,400 |  |  |
Buildings and Improvements | 9,198 |  |  |
Total | 10,598 |  |  |
Accumulated Depreciation at December 31, 2023 | 4,742 |  |  |
AUSTIN, TX | 11501 Burnet Road - Parking Garage |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 0 |  |  |
Buildings and Improvements | 19,826 |  |  |
Net Improvements (Retirements) Since Acquisition | 1,588 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 0 |  |  |
Buildings and Improvements | 21,414 |  |  |
Total | 21,414 |  |  |
Accumulated Depreciation at December 31, 2023 | 11,364 |  |  |
AUSTIN, TX | Four Points Centre 3, 11120 Four Points Drive |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 23,044 |  |  |
Land | 1,140 |  |  |
Buildings and Improvements | 0 |  |  |
Net Improvements (Retirements) Since Acquisition | 40,322 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 1,141 |  |  |
Buildings and Improvements | 40,321 |  |  |
Total | 41,462 |  |  |
Accumulated Depreciation at December 31, 2023 | 8,637 |  |  |
AUSTIN, TX | One Barton Skyway (1501 South MoPac Expressway) |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 10,496 |  |  |
Buildings and Improvements | 47,670 |  |  |
Net Improvements (Retirements) Since Acquisition | 8,189 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 10,495 |  |  |
Buildings and Improvements | 55,860 |  |  |
Total | 66,355 |  |  |
Accumulated Depreciation at December 31, 2023 | 8,647 |  |  |
AUSTIN, TX | Two Barton Skyway (1601 South MoPac Expressway) |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 10,849 |  |  |
Buildings and Improvements | 53,868 |  |  |
Net Improvements (Retirements) Since Acquisition | 3,784 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 10,848 |  |  |
Buildings and Improvements | 57,653 |  |  |
Total | 68,501 |  |  |
Accumulated Depreciation at December 31, 2023 | 9,099 |  |  |
AUSTIN, TX | Four Barton Skyway (1301 South MoPac Expressway) |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 13,301 |  |  |
Buildings and Improvements | 57,041 |  |  |
Net Improvements (Retirements) Since Acquisition | 7,895 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 13,300 |  |  |
Buildings and Improvements | 64,937 |  |  |
Total | 78,237 |  |  |
Accumulated Depreciation at December 31, 2023 | 9,367 |  |  |
AUSTIN, TX | Four Points Centre (11305 Four Points Drive) |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 7,800 |  |  |
Buildings and Improvements | 43,581 |  |  |
Net Improvements (Retirements) Since Acquisition | 4,622 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 7,800 |  |  |
Buildings and Improvements | 48,203 |  |  |
Total | 56,003 |  |  |
Accumulated Depreciation at December 31, 2023 | 7,977 |  |  |
AUSTIN, TX | River Place - Building 1 (6500 River Place Boulevard) |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 2,004 |  |  |
Buildings and Improvements | 17,680 |  |  |
Net Improvements (Retirements) Since Acquisition | 990 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 2,004 |  |  |
Buildings and Improvements | 18,670 |  |  |
Total | 20,674 |  |  |
Accumulated Depreciation at December 31, 2023 | 2,822 |  |  |
AUSTIN, TX | River Place - Building 2 (6500 River Place Boulevard) |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 3,137 |  |  |
Buildings and Improvements | 29,254 |  |  |
Net Improvements (Retirements) Since Acquisition | 1,508 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 3,137 |  |  |
Buildings and Improvements | 30,762 |  |  |
Total | 33,899 |  |  |
Accumulated Depreciation at December 31, 2023 | 4,338 |  |  |
AUSTIN, TX | River Place - Building 3 (6500 River Place Boulevard) |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 3,064 |  |  |
Buildings and Improvements | 26,705 |  |  |
Net Improvements (Retirements) Since Acquisition | 1,195 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 3,064 |  |  |
Buildings and Improvements | 27,900 |  |  |
Total | 30,964 |  |  |
Accumulated Depreciation at December 31, 2023 | 3,753 |  |  |
AUSTIN, TX | River Place - Building 4 (6500 River Place Boulevard |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 2,273 |  |  |
Buildings and Improvements | 18,617 |  |  |
Net Improvements (Retirements) Since Acquisition | 1,140 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 2,273 |  |  |
Buildings and Improvements | 19,757 |  |  |
Total | 22,030 |  |  |
Accumulated Depreciation at December 31, 2023 | 2,684 |  |  |
AUSTIN, TX | River Place - Building 5 (6500 River Place Boulevard) |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 1,752 |  |  |
Buildings and Improvements | 14,315 |  |  |
Net Improvements (Retirements) Since Acquisition | 736 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 1,752 |  |  |
Buildings and Improvements | 15,051 |  |  |
Total | 16,803 |  |  |
Accumulated Depreciation at December 31, 2023 | 2,218 |  |  |
AUSTIN, TX | River Place - Building 6 (6500 River Place Boulevard) |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 1,598 |  |  |
Buildings and Improvements | 12,945 |  |  |
Net Improvements (Retirements) Since Acquisition | 703 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 1,598 |  |  |
Buildings and Improvements | 13,648 |  |  |
Total | 15,246 |  |  |
Accumulated Depreciation at December 31, 2023 | 2,044 |  |  |
AUSTIN, TX | River Place - Building 7 (6500 River Place Boulevard) |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 1,801 |  |  |
Buildings and Improvements | 16,486 |  |  |
Net Improvements (Retirements) Since Acquisition | 1,374 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 1,801 |  |  |
Buildings and Improvements | 17,860 |  |  |
Total | 19,661 |  |  |
Accumulated Depreciation at December 31, 2023 | 3,146 |  |  |
AUSTIN, TX | Quarry Lake II (4516 Seton Center Parkway) |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 3,970 |  |  |
Buildings and Improvements | 30,546 |  |  |
Net Improvements (Retirements) Since Acquisition | 1,678 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 3,867 |  |  |
Buildings and Improvements | 32,327 |  |  |
Total | 36,194 |  |  |
Accumulated Depreciation at December 31, 2023 | 4,541 |  |  |
Other | 6600 Rockledge Drive |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 0 |  |  |
Buildings and Improvements | 37,421 |  |  |
Net Improvements (Retirements) Since Acquisition | (14,597) |  |  |
Gross Amount Which Carried |  |  |  |
Land | 0 |  |  |
Buildings and Improvements | 22,824 |  |  |
Total | 22,824 |  |  |
Accumulated Depreciation at December 31, 2023 | 9,299 |  |  |
Other | 1676 International Drive |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 18,437 |  |  |
Buildings and Improvements | 97,538 |  |  |
Net Improvements (Retirements) Since Acquisition | (30,581) |  |  |
Gross Amount Which Carried |  |  |  |
Land | 10,239 |  |  |
Buildings and Improvements | 75,155 |  |  |
Total | 85,394 |  |  |
Accumulated Depreciation at December 31, 2023 | 22,630 |  |  |
Other | 8260 Greensboro Drive |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 7,952 |  |  |
Buildings and Improvements | 33,964 |  |  |
Net Improvements (Retirements) Since Acquisition | 10,969 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 8,102 |  |  |
Buildings and Improvements | 44,783 |  |  |
Total | 52,885 |  |  |
Accumulated Depreciation at December 31, 2023 | 15,881 |  |  |
Other | 2340 Dulles Corner Boulevard |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 16,345 |  |  |
Buildings and Improvements | 65,379 |  |  |
Net Improvements (Retirements) Since Acquisition | (23,353) |  |  |
Gross Amount Which Carried |  |  |  |
Land | 9,747 |  |  |
Buildings and Improvements | 48,624 |  |  |
Total | 58,371 |  |  |
Accumulated Depreciation at December 31, 2023 | 1,192 |  |  |
Other | Dabney Land Westwood |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 1,732 |  |  |
Buildings and Improvements | 0 |  |  |
Net Improvements (Retirements) Since Acquisition | 3,690 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 819 |  |  |
Buildings and Improvements | 4,706 |  |  |
Total | 5,525 |  |  |
Accumulated Depreciation at December 31, 2023 | 493 |  |  |
Other | Main Street-Plaza 1000 |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 2,732 |  |  |
Buildings and Improvements | 10,942 |  |  |
Net Improvements (Retirements) Since Acquisition | 284 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 2,732 |  |  |
Buildings and Improvements | 11,226 |  |  |
Total | 13,958 |  |  |
Accumulated Depreciation at December 31, 2023 | 11,073 |  |  |
Other | Main Street-Piazza |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 696 |  |  |
Buildings and Improvements | 2,802 |  |  |
Net Improvements (Retirements) Since Acquisition | 2,762 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 704 |  |  |
Buildings and Improvements | 5,556 |  |  |
Total | 6,260 |  |  |
Accumulated Depreciation at December 31, 2023 | 4,042 |  |  |
Other | Main Street-Promenade |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 532 |  |  |
Buildings and Improvements | 2,052 |  |  |
Net Improvements (Retirements) Since Acquisition | 265 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 532 |  |  |
Buildings and Improvements | 2,317 |  |  |
Total | 2,849 |  |  |
Accumulated Depreciation at December 31, 2023 | 1,599 |  |  |
Other | 920 North King Street |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 6,141 |  |  |
Buildings and Improvements | 21,140 |  |  |
Net Improvements (Retirements) Since Acquisition | 7,272 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 6,141 |  |  |
Buildings and Improvements | 28,412 |  |  |
Total | 34,553 |  |  |
Accumulated Depreciation at December 31, 2023 | 17,591 |  |  |
Other | 300 Delaware Avenue |  |  |  |
Initial Cost |  |  |  |
Encumbrances | 0 |  |  |
Land | 6,369 |  |  |
Buildings and Improvements | 13,739 |  |  |
Net Improvements (Retirements) Since Acquisition | 2,386 |  |  |
Gross Amount Which Carried |  |  |  |
Land | 6,366 |  |  |
Buildings and Improvements | 16,128 |  |  |
Total | 22,494 |  |  |
Accumulated Depreciation at December 31, 2023 | $ 10,881 |  |  |

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