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| 0000789933-19-000045-index.html | 2019-07-31 17:08:01 | |
| 0000789933-19-000045.txt | 2019-07-31 17:08:01 | |
 0000789933-19-000045-xbrl.zip | 133049 | 2019-07-31 17:08:01 |
| exhibit311q219.htm | 14728 | 2019-07-31 17:08:01 |
| exhibit312q219.htm | 14721 | 2019-07-31 17:08:01 |
| exhibit32q219.htm | 11399 | 2019-07-31 17:08:01 |
| exhibit95q219.htm | 108090 | 2019-07-31 17:08:01 |
| FilingSummary.xml | 29184 | 2019-07-31 17:08:01 |
| Financial_Report.xlsx | 55565 | 2019-07-31 17:08:01 |
| nacco-20190630.xml | 1028518 | 2019-07-31 17:08:01 |
| nacco-20190630.xsd | 33072 | 2019-07-31 17:08:01 |
| nacco-20190630_cal.xml | 83608 | 2019-07-31 17:08:01 |
| nacco-20190630_def.xml | 129147 | 2019-07-31 17:08:01 |
| nacco-20190630_lab.xml | 408123 | 2019-07-31 17:08:01 |
| nacco-20190630_pre.xml | 242089 | 2019-07-31 17:08:01 |
| nc630201910-q.htm | 1166584 | 2019-07-31 17:08:01 |
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| report.css | 2767 | 2019-07-31 17:08:01 |
| Show.js | 1085 | 2019-07-31 17:08:01 |