Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001064728-22-000032-index-headers.html | 2022-03-28 16:15:12 | |
| 0001064728-22-000032-index.html | 2022-03-28 16:15:12 | |
| 0001064728-22-000032.txt | 2022-03-28 16:15:12 | |
 0001064728-22-000032-xbrl.zip | 11374 | 2022-03-28 16:15:12 |
| btu-20220323.htm | 36149 | 2022-03-28 16:15:12 |
| btu-20220323.xsd | 1927 | 2022-03-28 16:15:12 |
| btu-20220323_htm.xml | 11251 | 2022-03-28 16:15:12 |
| btu-20220323_lab.xml | 24137 | 2022-03-28 16:15:12 |
| btu-20220323_pre.xml | 12529 | 2022-03-28 16:15:12 |
| FilingSummary.xml | 1618 | 2022-03-28 16:15:12 |
| Financial_Report.xlsx | 5673 | 2022-03-28 16:15:12 |
| MetaLinks.json | 16728 | 2022-03-28 16:15:12 |
| R1.htm | 38710 | 2022-03-28 16:15:12 |
| report.css | 2766 | 2022-03-28 16:15:12 |
| Show.js | 1084 | 2022-03-28 16:15:12 |