Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

v3.8.0.1
Document and Entity Information - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Mar. 01, 2018
Jun. 30, 2017
Document and Entity Information      
Entity Registrant Name DOUGLAS DYNAMICS, INC    
Entity Central Index Key 0001287213    
Document Type 10-K    
Document Period End Date Dec. 31, 2017    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 738
Entity Common Stock, Shares Outstanding   22,590,897  
Document Fiscal Year Focus 2017    
Document Fiscal Period Focus FY