Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000790816-22-000030-index-headers.html | 2022-10-28 13:28:19 | |
| 0000790816-22-000030-index.html | 2022-10-28 13:28:19 | |
| 0000790816-22-000030.txt | 2022-10-28 13:28:19 | |
 0000790816-22-000030-xbrl.zip | 447159 | 2022-10-28 13:28:19 |
| bdn-20220930.htm | 3214637 | 2022-10-28 13:28:19 |
| bdn-20220930.xsd | 74093 | 2022-10-28 13:28:19 |
| bdn-20220930_cal.xml | 116121 | 2022-10-28 13:28:19 |
| bdn-20220930_def.xml | 504023 | 2022-10-28 13:28:19 |
| bdn-20220930_htm.xml | 2346697 | 2022-10-28 13:28:19 |
| bdn-20220930_lab.xml | 783393 | 2022-10-28 13:28:19 |
| bdn-20220930_pre.xml | 674517 | 2022-10-28 13:28:19 |
| bdnex311q32022.htm | 9871 | 2022-10-28 13:28:19 |
| bdnex312q32022.htm | 9875 | 2022-10-28 13:28:19 |
| bdnex313q32022.htm | 10207 | 2022-10-28 13:28:19 |
| bdnex314q32022.htm | 10176 | 2022-10-28 13:28:19 |
| bdnex321q32022.htm | 5016 | 2022-10-28 13:28:19 |
| bdnex322q32022.htm | 5040 | 2022-10-28 13:28:19 |
| bdnex323q32022.htm | 5326 | 2022-10-28 13:28:19 |
| bdnex324q32022.htm | 5350 | 2022-10-28 13:28:19 |
| FilingSummary.xml | 47340 | 2022-10-28 13:28:19 |
| Financial_Report.xlsx | 143672 | 2022-10-28 13:28:19 |
| MetaLinks.json | 817052 | 2022-10-28 13:28:19 |
| R1.htm | 58521 | 2022-10-28 13:28:19 |
| R10.htm | 121096 | 2022-10-28 13:28:19 |
| R11.htm | 15005 | 2022-10-28 13:28:19 |
| R12.htm | 124251 | 2022-10-28 13:28:19 |
| R13.htm | 44943 | 2022-10-28 13:28:19 |
| R14.htm | 92819 | 2022-10-28 13:28:19 |
| R15.htm | 5888 | 2022-10-28 13:28:19 |
| R16.htm | 163828 | 2022-10-28 13:28:19 |
| R17.htm | 4833 | 2022-10-28 13:28:19 |
| R18.htm | 19276 | 2022-10-28 13:28:19 |
| R19.htm | 10933 | 2022-10-28 13:28:19 |
| R2.htm | 126650 | 2022-10-28 13:28:19 |
| R20.htm | 59992 | 2022-10-28 13:28:19 |
| R21.htm | 49791 | 2022-10-28 13:28:19 |
| R22.htm | 16260 | 2022-10-28 13:28:19 |
| R23.htm | 50548 | 2022-10-28 13:28:19 |
| R24.htm | 53621 | 2022-10-28 13:28:19 |
| R25.htm | 24145 | 2022-10-28 13:28:19 |
| R26.htm | 23247 | 2022-10-28 13:28:19 |
| R27.htm | 7272 | 2022-10-28 13:28:19 |
| R28.htm | 55072 | 2022-10-28 13:28:19 |
| R29.htm | 55727 | 2022-10-28 13:28:19 |
| R3.htm | 14010 | 2022-10-28 13:28:19 |
| R30.htm | 135425 | 2022-10-28 13:28:19 |
| R31.htm | 14341 | 2022-10-28 13:28:19 |
| R32.htm | 15172 | 2022-10-28 13:28:19 |
| R33.htm | 14601 | 2022-10-28 13:28:19 |
| R34.htm | 68316 | 2022-10-28 13:28:19 |
| R35.htm | 41000 | 2022-10-28 13:28:19 |
| R36.htm | 16198 | 2022-10-28 13:28:19 |
| R37.htm | 52156 | 2022-10-28 13:28:19 |
| R38.htm | 45102 | 2022-10-28 13:28:19 |
| R39.htm | 16212 | 2022-10-28 13:28:19 |
| R4.htm | 118575 | 2022-10-28 13:28:19 |
| R40.htm | 21505 | 2022-10-28 13:28:19 |
| R41.htm | 101693 | 2022-10-28 13:28:19 |
| R42.htm | 101688 | 2022-10-28 13:28:19 |
| R43.htm | 131258 | 2022-10-28 13:28:19 |
| R44.htm | 31373 | 2022-10-28 13:28:19 |
| R45.htm | 21175 | 2022-10-28 13:28:19 |
| R46.htm | 14188 | 2022-10-28 13:28:19 |
| R47.htm | 24680 | 2022-10-28 13:28:19 |
| R48.htm | 45072 | 2022-10-28 13:28:19 |
| R49.htm | 24269 | 2022-10-28 13:28:19 |
| R5.htm | 42409 | 2022-10-28 13:28:19 |
| R50.htm | 40486 | 2022-10-28 13:28:19 |
| R51.htm | 166091 | 2022-10-28 13:28:19 |
| R52.htm | 30192 | 2022-10-28 13:28:19 |
| R53.htm | 46176 | 2022-10-28 13:28:19 |
| R54.htm | 9930 | 2022-10-28 13:28:19 |
| R55.htm | 29985 | 2022-10-28 13:28:19 |
| R56.htm | 36873 | 2022-10-28 13:28:19 |
| R57.htm | 62074 | 2022-10-28 13:28:19 |
| R58.htm | 62892 | 2022-10-28 13:28:19 |
| R59.htm | 29047 | 2022-10-28 13:28:19 |
| R6.htm | 107100 | 2022-10-28 13:28:19 |
| R60.htm | 28127 | 2022-10-28 13:28:19 |
| R61.htm | 15580 | 2022-10-28 13:28:19 |
| R62.htm | 12028 | 2022-10-28 13:28:19 |
| R63.htm | 62767 | 2022-10-28 13:28:19 |
| R64.htm | 23966 | 2022-10-28 13:28:19 |
| R65.htm | 61726 | 2022-10-28 13:28:19 |
| R66.htm | 19969 | 2022-10-28 13:28:19 |
| R67.htm | 4330 | 2022-10-28 13:28:19 |
| R68.htm | 27447 | 2022-10-28 13:28:19 |
| R69.htm | 41069 | 2022-10-28 13:28:19 |
| R7.htm | 5167 | 2022-10-28 13:28:19 |
| R70.htm | 23249 | 2022-10-28 13:28:19 |
| R71.htm | 51068 | 2022-10-28 13:28:19 |
| R72.htm | 38540 | 2022-10-28 13:28:19 |
| R8.htm | 140068 | 2022-10-28 13:28:19 |
| R9.htm | 4626 | 2022-10-28 13:28:19 |
| report.css | 2767 | 2022-10-28 13:28:19 |
| Show.js | 1085 | 2022-10-28 13:28:19 |