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|---|---|---|
 0000789933-21-000025-index-headers.html | 2021-05-05 17:00:00 | |
| 0000789933-21-000025-index.html | 2021-05-05 17:00:00 | |
| 0000789933-21-000025.txt | 2021-05-05 17:00:00 | |
 0000789933-21-000025-xbrl.zip | 162578 | 2021-05-05 17:00:00 |
| exhibit311q121.htm | 11293 | 2021-05-05 17:00:00 |
| exhibit312q121.htm | 11020 | 2021-05-05 17:00:00 |
| exhibit32q121.htm | 8744 | 2021-05-05 17:00:00 |
| exhibit95q121.htm | 89087 | 2021-05-05 17:00:00 |
| FilingSummary.xml | 20695 | 2021-05-05 17:00:00 |
| Financial_Report.xlsx | 47898 | 2021-05-05 17:00:00 |
| MetaLinks.json | 353298 | 2021-05-05 17:00:00 |
| nacco-20210331.htm | 973446 | 2021-05-05 17:00:00 |
| nacco-20210331.xsd | 23635 | 2021-05-05 17:00:00 |
| nacco-20210331_cal.xml | 53565 | 2021-05-05 17:00:00 |
| nacco-20210331_def.xml | 135260 | 2021-05-05 17:00:00 |
| nacco-20210331_htm.xml | 518547 | 2021-05-05 17:00:00 |
| nacco-20210331_lab.xml | 310646 | 2021-05-05 17:00:00 |
| nacco-20210331_pre.xml | 201538 | 2021-05-05 17:00:00 |
| R1.htm | 57680 | 2021-05-05 17:00:00 |
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| R9.htm | 4522 | 2021-05-05 17:00:00 |
| report.css | 2767 | 2021-05-05 17:00:00 |
| Show.js | 1085 | 2021-05-05 17:00:00 |