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Cover Page - USD ($)
 12 Months Ended
Dec. 31, 2023
Feb. 29, 2024
Jun. 30, 2023
Entity Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
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 5875 Landerbrook Drive,    
Entity Address, Address Line Two Suite 220    
Entity Address, City or Town Cleveland,    
Entity Address, State or Province OH    
Entity Address, Postal Zip Code 44124-4069    
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     $ 156,415,693
Documents Incorporated by Reference
Portions of the Company's Proxy Statement for its 2024 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 2023    
Document Fiscal Period Focus FY    
Amendment Flag false    
Shares Outstanding Class A      
Entity Information [Line Items]      
Entity Common Stock, Shares Outstanding   5,929,944  
Shares Outstanding Class B      
Entity Information [Line Items]      
Entity Common Stock, Shares Outstanding   1,565,685