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| 0000768835-20-000087-index.html | 2020-06-10 16:21:02 | |
| 0000768835-20-000087.txt | 2020-06-10 16:21:02 | |
 0000768835-20-000087-xbrl.zip | 185717 | 2020-06-10 16:21:02 |
| big-20200502.xsd | 29562 | 2020-06-10 16:21:02 |
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| big-202052xex321.htm | 6928 | 2020-06-10 16:21:02 |
| big-202052xex322.htm | 7551 | 2020-06-10 16:21:02 |
| exhibit103-2020ltiprsu.htm | 29555 | 2020-06-10 16:21:02 |
| exhibit104-2020ltiprsu.htm | 40746 | 2020-06-10 16:21:02 |
| exhibit105-2020ltipdsu.htm | 45431 | 2020-06-10 16:21:02 |
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| exhibit107-2020ltippsu.htm | 63813 | 2020-06-10 16:21:02 |
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| R9.htm | 22880 | 2020-06-10 16:21:02 |
| report.css | 2767 | 2020-06-10 16:21:02 |
| Show.js | 1085 | 2020-06-10 16:21:02 |