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|---|---|---|
 0001193125-18-041876-index-headers.html | 2018-02-13 12:28:55 | |
| 0001193125-18-041876-index.html | 2018-02-13 12:28:55 | |
| 0001193125-18-041876.txt | 2018-02-13 12:28:55 | |
 0001193125-18-041876-xbrl.zip | 80600 | 2018-02-13 12:28:55 |
 BarChart1.png | 30632 | 2018-02-13 12:28:55 |
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 BarChart3.png | 30340 | 2018-02-13 12:28:55 |
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| bf18-20180125_lab.xml | 150631 | 2018-02-13 12:28:55 |
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| d514737d485bpos.htm | 39161 | 2018-02-13 12:28:55 |
| FilingSummary.xml | 6533 | 2018-02-13 12:28:55 |
 g514737sid.jpg | 2150 | 2018-02-13 12:28:55 |
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| R10.htm | 109014 | 2018-02-13 12:28:55 |
| R15.htm | 179845 | 2018-02-13 12:28:55 |
| R16.htm | 110029 | 2018-02-13 12:28:55 |
| R2.htm | 131727 | 2018-02-13 12:28:55 |
| R21.htm | 187596 | 2018-02-13 12:28:55 |
| R22.htm | 7477 | 2018-02-13 12:28:55 |
| R9.htm | 241173 | 2018-02-13 12:28:55 |
| report.css | 2767 | 2018-02-13 12:28:55 |
| Show.js | 1410 | 2018-02-13 12:28:55 |