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| 0000789933-22-000035.txt | 2022-05-04 17:04:53 | |
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| exhibit101-firstamendmentt.htm | 12094 | 2022-05-04 17:04:53 |
| exhibit311q122.htm | 11267 | 2022-05-04 17:04:53 |
| exhibit312q122.htm | 11020 | 2022-05-04 17:04:53 |
| exhibit32q122.htm | 8744 | 2022-05-04 17:04:53 |
| exhibit95q122.htm | 92136 | 2022-05-04 17:04:53 |
| FilingSummary.xml | 21747 | 2022-05-04 17:04:53 |
| Financial_Report.xlsx | 51167 | 2022-05-04 17:04:53 |
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| nacco-20220331.htm | 990261 | 2022-05-04 17:04:53 |
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| nacco-20220331_cal.xml | 44713 | 2022-05-04 17:04:53 |
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| nacco-20220331_htm.xml | 523646 | 2022-05-04 17:04:53 |
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