    <SEC-DOCUMENT>0000789933-23-000003-index.html : 20230119
    <SEC-HEADER>0000789933-23-000003.hdr.sgml : 20230119
    <ACCEPTANCE-DATETIME>20230119164109
    ACCESSION NUMBER:		0000789933-23-000003
    CONFORMED SUBMISSION TYPE:	10-K/A
    PUBLIC DOCUMENT COUNT:		54
    CONFORMED PERIOD OF REPORT:	20211231
    FILED AS OF DATE:		20230119
    DATE AS OF CHANGE:		20230119

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			NACCO INDUSTRIES INC
    		CENTRAL INDEX KEY:			0000789933
    		STANDARD INDUSTRIAL CLASSIFICATION:	BITUMINOUS COAL & LIGNITE SURFACE MINING [1221]
    		IRS NUMBER:				341505819
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		10-K/A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-09172
    		FILM NUMBER:		23537874

    	BUSINESS ADDRESS:
    		STREET 1:		5875 LANDERBROOK DR
    		STREET 2:		SUITE 220
    		CITY:			CLEVELAND
    		STATE:			OH
    		ZIP:			44124-4069
    		BUSINESS PHONE:		4402295123

    	MAIL ADDRESS:
    		STREET 1:		5875 LANDERBROOK DR
    		CITY:			CLEVELAND
    		STATE:			OH
    		ZIP:			44124
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>10-K/A
    <SEQUENCE>1
    <FILENAME>nacco-20211231.htm
    <DESCRIPTION>10-K/A
    <TEXT>
    Document 1 - file: nacco-20211231.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-23.2
    <SEQUENCE>2
    <FILENAME>exhibit232202110-ka.htm
    <DESCRIPTION>EX-23.2
    <TEXT>
    Document 2 - file: exhibit232202110-ka.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-23.3
    <SEQUENCE>3
    <FILENAME>exhibit233202110-ka.htm
    <DESCRIPTION>EX-23.3
    <TEXT>
    Document 3 - file: exhibit233202110-ka.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-31.1
    <SEQUENCE>4
    <FILENAME>exhibit311202110-ka.htm
    <DESCRIPTION>EX-31.1
    <TEXT>
    Document 4 - file: exhibit311202110-ka.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-31.2
    <SEQUENCE>5
    <FILENAME>exhibit312202110-ka.htm
    <DESCRIPTION>EX-31.2
    <TEXT>
    Document 5 - file: exhibit312202110-ka.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-96.4
    <SEQUENCE>6
    <FILENAME>exhibit964-mlmcsk1300x21re.htm
    <DESCRIPTION>EX-96.4
    <TEXT>
    Document 6 - file: exhibit964-mlmcsk1300x21re.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>7
    <FILENAME>nacco-20211231.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
    <TEXT>
    Document 7 - file: nacco-20211231.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.DEF
    <SEQUENCE>8
    <FILENAME>nacco-20211231_def.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT
    <TEXT>
    Document 8 - file: nacco-20211231_def.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>9
    <FILENAME>nacco-20211231_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT
    <TEXT>
    Document 9 - file: nacco-20211231_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>10
    <FILENAME>nacco-20211231_pre.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT
    <TEXT>
    Document 10 - file: nacco-20211231_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>image1a.jpg
    <TEXT>
    Document 11 - file: image1a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>image_0a.jpg
    <TEXT>
    Document 12 - file: image_0a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>image_10a.jpg
    <TEXT>
    Document 13 - file: image_10a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>image_11a.jpg
    <TEXT>
    Document 14 - file: image_11a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>image_12a.jpg
    <TEXT>
    Document 15 - file: image_12a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>image_13a.jpg
    <TEXT>
    Document 16 - file: image_13a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>image_14a.jpg
    <TEXT>
    Document 17 - file: image_14a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>image_15a.jpg
    <TEXT>
    Document 18 - file: image_15a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>image_16a.jpg
    <TEXT>
    Document 19 - file: image_16a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>image_17a.jpg
    <TEXT>
    Document 20 - file: image_17a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>image_18a.jpg
    <TEXT>
    Document 21 - file: image_18a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>image_19a.jpg
    <TEXT>
    Document 22 - file: image_19a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>image_1a.jpg
    <TEXT>
    Document 23 - file: image_1a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>image_20a.jpg
    <TEXT>
    Document 24 - file: image_20a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>25
    <FILENAME>image_22a.jpg
    <TEXT>
    Document 25 - file: image_22a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>26
    <FILENAME>image_23a.jpg
    <TEXT>
    Document 26 - file: image_23a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>27
    <FILENAME>image_24a.jpg
    <TEXT>
    Document 27 - file: image_24a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>28
    <FILENAME>image_25a.jpg
    <TEXT>
    Document 28 - file: image_25a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>29
    <FILENAME>image_26a.jpg
    <TEXT>
    Document 29 - file: image_26a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>30
    <FILENAME>image_27a.jpg
    <TEXT>
    Document 30 - file: image_27a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>31
    <FILENAME>image_28a.jpg
    <TEXT>
    Document 31 - file: image_28a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>32
    <FILENAME>image_29a.jpg
    <TEXT>
    Document 32 - file: image_29a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>33
    <FILENAME>image_2a.jpg
    <TEXT>
    Document 33 - file: image_2a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>34
    <FILENAME>image_3a.jpg
    <TEXT>
    Document 34 - file: image_3a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>35
    <FILENAME>image_6a.jpg
    <TEXT>
    Document 35 - file: image_6a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>36
    <FILENAME>image_7a.jpg
    <TEXT>
    Document 36 - file: image_7a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>37
    <FILENAME>image_8a.jpg
    <TEXT>
    Document 37 - file: image_8a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>38
    <FILENAME>image_9a.jpg
    <TEXT>
    Document 38 - file: image_9a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>39
    <FILENAME>imagea.jpg
    <TEXT>
    Document 39 - file: imagea.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>40
    <FILENAME>nacco-20211231_g1.jpg
    <TEXT>
    Document 40 - file: nacco-20211231_g1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>41
    <FILENAME>nacco-20211231_g2.jpg
    <TEXT>
    Document 41 - file: nacco-20211231_g2.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>42
    <FILENAME>nacco-20211231_g3.jpg
    <TEXT>
    Document 42 - file: nacco-20211231_g3.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>43
    <FILENAME>nacco-20211231_g4.jpg
    <TEXT>
    Document 43 - file: nacco-20211231_g4.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>44
    <FILENAME>nacco-20211231_g5.jpg
    <TEXT>
    Document 44 - file: nacco-20211231_g5.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>45
    <FILENAME>table121mineralreserveesti.jpg
    <TEXT>
    Document 45 - file: table121mineralreserveesti.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>46
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 46 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>47
    <FILENAME>R2.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 47 - file: R2.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>48
    <FILENAME>nacco-20211231_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 48 - file: nacco-20211231_htm.html

    Document 48 - RAW XML: nacco-20211231_htm.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>49
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 49 - file: Financial_Report.xlsx

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>50
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 50 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>51
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 51 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>52
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 52 - file: FilingSummary.html

    Document 52 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>54
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 54 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>55
    <FILENAME>0000789933-23-000003-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 55 - file: 0000789933-23-000003-xbrl.zip

    </DOCUMENT>
    </SEC-DOCUMENT>