Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-21-176964-index-headers.html | 2021-05-28 16:15:42 | |
| 0001193125-21-176964-index.html | 2021-05-28 16:15:42 | |
| 0001193125-21-176964.txt | 2021-05-28 16:15:42 | |
 0001193125-21-176964-xbrl.zip | 36121 | 2021-05-28 16:15:42 |
| ck0000832101-20210528.xsd | 3117 | 2021-05-28 16:15:42 |
| ck0000832101-20210528_lab.xml | 16083 | 2021-05-28 16:15:42 |
| ck0000832101-20210528_pre.xml | 10144 | 2021-05-28 16:15:42 |
| d186613d8k.htm | 31238 | 2021-05-28 16:15:42 |
| d186613d8k_htm.xml | 3061 | 2021-05-28 16:15:42 |
| d186613dex42.htm | 132129 | 2021-05-28 16:15:42 |
| d186613dex51.htm | 11059 | 2021-05-28 16:15:42 |
| FilingSummary.xml | 1792 | 2021-05-28 16:15:42 |
| Financial_Report.xlsx | 5592 | 2021-05-28 16:15:42 |
 g186613gra001.jpg | 9535 | 2021-05-28 16:15:42 |
| MetaLinks.json | 17104 | 2021-05-28 16:15:42 |
| R1.htm | 35354 | 2021-05-28 16:15:42 |
| report.css | 2767 | 2021-05-28 16:15:42 |
| Show.js | 1085 | 2021-05-28 16:15:42 |