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Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Feb. 19, 2021
Jun. 30, 2020
Document and Entity Information [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2020    
Entity File Number 001-13337    
Entity Registrant Name STONERIDGE INC    
Entity Incorporation, State or Country Code OH    
Entity Tax Identification Number 34-1598949    
Entity Address, Address Line One 39675 MacKenzie Drive, Suite 400    
Entity Address, City or Town Novi    
Entity Address, State or Province MI    
Entity Address, Postal Zip Code 48377    
City Area Code 248    
Local Phone Number 489-9300    
Title of 12(g) Security Common Shares, without par value    
Trading Symbol sri    
Amendment Flag false    
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 false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 532.3
Entity Common Stock Shares Outstanding   27,005,257  
Entity Central Index Key 0001043337    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY