Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000790816-24-000050-index-headers.html | 2024-11-04 15:15:16 | |
| 0000790816-24-000050-index.html | 2024-11-04 15:15:16 | |
| 0000790816-24-000050.txt | 2024-11-04 15:15:16 | |
 0000790816-24-000050-xbrl.zip | 352589 | 2024-11-04 15:15:16 |
| bdn-20240930.htm | 2459662 | 2024-11-04 15:15:16 |
| bdn-20240930.xsd | 73077 | 2024-11-04 15:15:16 |
| bdn-20240930_cal.xml | 110927 | 2024-11-04 15:15:16 |
| bdn-20240930_def.xml | 455573 | 2024-11-04 15:15:16 |
| bdn-20240930_htm.xml | 1542237 | 2024-11-04 15:15:16 |
| bdn-20240930_lab.xml | 782208 | 2024-11-04 15:15:16 |
| bdn-20240930_pre.xml | 695252 | 2024-11-04 15:15:16 |
| bdnex311q32024.htm | 9785 | 2024-11-04 15:15:16 |
| bdnex312q32024.htm | 9789 | 2024-11-04 15:15:16 |
| bdnex313q32024.htm | 10121 | 2024-11-04 15:15:16 |
| bdnex314q32024.htm | 10090 | 2024-11-04 15:15:16 |
| bdnex321q32024.htm | 4930 | 2024-11-04 15:15:16 |
| bdnex322q32024.htm | 4954 | 2024-11-04 15:15:16 |
| bdnex323q32024.htm | 5240 | 2024-11-04 15:15:16 |
| bdnex324q32024.htm | 5264 | 2024-11-04 15:15:16 |
| FilingSummary.xml | 49914 | 2024-11-04 15:15:16 |
| Financial_Report.xlsx | 143114 | 2024-11-04 15:15:16 |
| MetaLinks.json | 1029645 | 2024-11-04 15:15:16 |
| R1.htm | 58516 | 2024-11-04 15:15:16 |
| R10.htm | 123542 | 2024-11-04 15:15:16 |
| R11.htm | 18099 | 2024-11-04 15:15:16 |
| R12.htm | 131748 | 2024-11-04 15:15:16 |
| R13.htm | 40271 | 2024-11-04 15:15:16 |
| R14.htm | 84037 | 2024-11-04 15:15:16 |
| R15.htm | 5914 | 2024-11-04 15:15:16 |
| R16.htm | 165779 | 2024-11-04 15:15:16 |
| R17.htm | 4799 | 2024-11-04 15:15:16 |
| R18.htm | 18665 | 2024-11-04 15:15:16 |
| R19.htm | 10679 | 2024-11-04 15:15:16 |
| R2.htm | 136374 | 2024-11-04 15:15:16 |
| R20.htm | 15675 | 2024-11-04 15:15:16 |
| R21.htm | 58671 | 2024-11-04 15:15:16 |
| R22.htm | 30810 | 2024-11-04 15:15:16 |
| R23.htm | 44647 | 2024-11-04 15:15:16 |
| R24.htm | 72821 | 2024-11-04 15:15:16 |
| R25.htm | 26516 | 2024-11-04 15:15:16 |
| R26.htm | 32477 | 2024-11-04 15:15:16 |
| R27.htm | 6906 | 2024-11-04 15:15:16 |
| R28.htm | 52889 | 2024-11-04 15:15:16 |
| R29.htm | 50937 | 2024-11-04 15:15:16 |
| R3.htm | 15415 | 2024-11-04 15:15:16 |
| R30.htm | 136648 | 2024-11-04 15:15:16 |
| R31.htm | 15627 | 2024-11-04 15:15:16 |
| R32.htm | 14824 | 2024-11-04 15:15:16 |
| R33.htm | 8479 | 2024-11-04 15:15:16 |
| R34.htm | 15044 | 2024-11-04 15:15:16 |
| R35.htm | 13940 | 2024-11-04 15:15:16 |
| R36.htm | 11405 | 2024-11-04 15:15:16 |
| R37.htm | 47367 | 2024-11-04 15:15:16 |
| R38.htm | 16401 | 2024-11-04 15:15:16 |
| R39.htm | 46256 | 2024-11-04 15:15:16 |
| R4.htm | 132517 | 2024-11-04 15:15:16 |
| R40.htm | 63748 | 2024-11-04 15:15:16 |
| R41.htm | 15128 | 2024-11-04 15:15:16 |
| R42.htm | 30463 | 2024-11-04 15:15:16 |
| R43.htm | 93934 | 2024-11-04 15:15:16 |
| R44.htm | 93929 | 2024-11-04 15:15:16 |
| R45.htm | 129298 | 2024-11-04 15:15:16 |
| R46.htm | 30074 | 2024-11-04 15:15:16 |
| R47.htm | 18311 | 2024-11-04 15:15:16 |
| R48.htm | 12490 | 2024-11-04 15:15:16 |
| R49.htm | 36977 | 2024-11-04 15:15:16 |
| R5.htm | 38730 | 2024-11-04 15:15:16 |
| R50.htm | 54745 | 2024-11-04 15:15:16 |
| R51.htm | 39617 | 2024-11-04 15:15:16 |
| R52.htm | 54140 | 2024-11-04 15:15:16 |
| R53.htm | 10735 | 2024-11-04 15:15:16 |
| R54.htm | 13344 | 2024-11-04 15:15:16 |
| R55.htm | 14301 | 2024-11-04 15:15:16 |
| R56.htm | 52902 | 2024-11-04 15:15:16 |
| R57.htm | 21198 | 2024-11-04 15:15:16 |
| R58.htm | 9810 | 2024-11-04 15:15:16 |
| R59.htm | 24600 | 2024-11-04 15:15:16 |
| R6.htm | 104866 | 2024-11-04 15:15:16 |
| R60.htm | 33534 | 2024-11-04 15:15:16 |
| R61.htm | 125289 | 2024-11-04 15:15:16 |
| R62.htm | 42794 | 2024-11-04 15:15:16 |
| R63.htm | 28980 | 2024-11-04 15:15:16 |
| R64.htm | 31688 | 2024-11-04 15:15:16 |
| R65.htm | 16823 | 2024-11-04 15:15:16 |
| R66.htm | 5938 | 2024-11-04 15:15:16 |
| R67.htm | 60089 | 2024-11-04 15:15:16 |
| R68.htm | 35941 | 2024-11-04 15:15:16 |
| R69.htm | 58949 | 2024-11-04 15:15:16 |
| R7.htm | 4981 | 2024-11-04 15:15:16 |
| R70.htm | 24086 | 2024-11-04 15:15:16 |
| R71.htm | 4860 | 2024-11-04 15:15:16 |
| R72.htm | 26563 | 2024-11-04 15:15:16 |
| R73.htm | 38518 | 2024-11-04 15:15:16 |
| R74.htm | 24005 | 2024-11-04 15:15:16 |
| R75.htm | 58435 | 2024-11-04 15:15:16 |
| R76.htm | 61175 | 2024-11-04 15:15:16 |
| R8.htm | 142874 | 2024-11-04 15:15:16 |
| R9.htm | 4590 | 2024-11-04 15:15:16 |
| report.css | 2767 | 2024-11-04 15:15:16 |
| Show.js | 1085 | 2024-11-04 15:15:16 |