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Cover Page - USD ($)
 12 Months Ended
Dec. 31, 2024
Feb. 28, 2025
Jun. 30, 2024
Entity Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2024    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 1-9172    
Entity Registrant Name NACCO INDUSTRIES, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 34-1505819    
Entity Address, Address Line One 22901 Millcreek Blvd,    
Entity Address, Address Line Two Suite 600    
Entity Address, City or Town Cleveland,    
Entity Address, State or Province OH    
Entity Address, Postal Zip Code 44122    
City Area Code 440    
Local Phone Number 229-5151    
Title of 12(b) Security Class A Common Stock, $1 par value per share    
Trading Symbol NC    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 117,744,151
Documents Incorporated by Reference
Portions of the Company's Proxy Statement for its 2025 annual meeting of stockholders are incorporated herein by reference in Part III of this Form 10-K.
    
Entity Central Index Key 0000789933    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Amendment Flag false    
Shares Outstanding Class A      
Entity Information [Line Items]      
Entity Common Stock, Shares Outstanding   5,866,937  
Shares Outstanding Class B      
Entity Information [Line Items]      
Entity Common Stock, Shares Outstanding   1,565,359