Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Feb. 22, 2022
Jun. 30, 2021
Document and Entity Information      
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2021    
Entity File Number 001-34728    
Entity Registrant Name DOUGLAS DYNAMICS, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 13-4275891    
Entity Address, Address Line One 11270 W Park Place Ste. 300    
Entity Address, City or Town Milwaukee    
Entity Address, Postal Zip Code 53223    
Entity Address, State or Province WI    
City Area Code 414    
Local Phone Number 354-2310    
Title of 12(b) Security Common Stock, par value $.01 per share    
Trading Symbol PLOW    
Security Exchange Name NYSE    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding   22,980,951  
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001287213    
Amendment Flag false    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Public Float     $ 935
Auditor Name DELOITTE & TOUCHE LLP    
Auditor Firm ID 34    
Auditor Location Milwaukee, Wisconsin