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Summary of Significant Accounting Policies (Narrative) (Details)
€ in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended 64 Months Ended
Mar. 31, 2019
USD ($)
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
shares
Dec. 31, 2018
USD ($)
shares
May 15, 2015
Mar. 31, 2018
USD ($)
Mar. 31, 2018
EUR (€)
May 16, 2017
Accounting Policy [Line Items]                
Depreciation expense   $ 27,309 $ 24,904 $ 22,786        
Asset impairments   2,326            
Preproduction costs related to long-term supply arrangements, costs capitalized   14,259 7,666          
Impairment of Goodwill   0 0 0        
Intangible assets, net   55,394 58,122          
Amortization   5,399 5,955 6,406        
Amortization expense next year   5,200            
Amortization expense year two   5,200            
Amortization expense year three   4,300            
Amortization expense year four   4,300            
Amortization expense year five   $ 4,300            
Intangible assets, weighted-average remaining amortization period, years   10 years            
Intangible impairment charge   $ 0 0 202        
Design and development expense   $ 49,386 $ 52,198 $ 51,074        
Design and development expense percentage   7.60% 6.30% 5.90%        
Research and development expense reimbursed   $ 19,302 $ 15,096 $ 16,540        
Share-based compensation expense   5,888 6,191 5,632        
Share-based compensation expense capitalized as inventory   $ 0 0 0        
Antidilutive securities excluded from computation of earnings per share | shares   372,937            
Cumulative goodwill impairment   $ 300,083 300,083          
Product warranty and recall accrual   3,647 3,111          
Inventory amount, FIFO   82,308 82,910          
Inventory amount, weighted average cost   8,240 10,539          
Foreign currency transaction gain (loss)   997 (372) 487        
Amortization of financing costs   506 624 326        
Interest expense, net   (6,124) (4,324) (4,720)        
Deferred financing costs, net   2,187 1,625          
Operating lease right-of-use asset   18,944 22,027          
Operating lease liability   19,705 22,527          
Earn-out consideration, operating and financing activities $ 8,474              
Payment of earn-out consideration paid within operating activities   (3,196) 2,308 213        
Earn-out consideration cash payment within financing activities     3,394          
Selling, General and Administrative Expenses [Member]                
Accounting Policy [Line Items]                
Share-based compensation expense   5,888 6,191 5,632        
Prepaid Expenses and Other Current Assets [Member]                
Accounting Policy [Line Items]                
Preproduction costs related to long-term supply arrangements, costs capitalized   14,259 7,544          
Electronics [Member]                
Accounting Policy [Line Items]                
Intangible impairment charge       202        
Interest expense, net   (612) (350) (85)        
Stoneridge Brazil [Member]                
Accounting Policy [Line Items]                
Interest expense, net   (29) (208) (824)        
Control Devices [Member]                
Accounting Policy [Line Items]                
Interest expense, net   $ (343) $ (811) $ (76)        
Performance Based Right to Receive Common Shares [Member]                
Accounting Policy [Line Items]                
Common shares, non-vested | shares   752,784 566,337 628,220        
Share-based compensation arrangement by share-based payment award, equity instruments other than options, nonvested, number | shares   752,784 566,337 628,220        
Customer Lists [Member]                
Accounting Policy [Line Items]                
Intangible assets, net   $ 29,809 $ 33,284          
Customer Lists [Member] | Electronics [Member]                
Accounting Policy [Line Items]                
Intangible assets, net   23,004            
Customer Lists [Member] | Stoneridge Brazil [Member]                
Accounting Policy [Line Items]                
Intangible assets, net   6,804            
Trade Names [Member]                
Accounting Policy [Line Items]                
Intangible assets, net   10,911 13,354          
Trade Names [Member] | Electronics [Member]                
Accounting Policy [Line Items]                
Intangible assets, net   4,678            
Trade Names [Member] | Stoneridge Brazil [Member]                
Accounting Policy [Line Items]                
Intangible assets, net   6,234            
Technology [Member]                
Accounting Policy [Line Items]                
Intangible assets, net   5,720 7,878          
Technology [Member] | Electronics [Member]                
Accounting Policy [Line Items]                
Intangible assets, net   2,759            
Technology [Member] | Stoneridge Brazil [Member]                
Accounting Policy [Line Items]                
Intangible assets, net   2,863            
Technology [Member] | Control Devices [Member]                
Accounting Policy [Line Items]                
Intangible assets, net   98            
Capitalized Software Development [Member]                
Accounting Policy [Line Items]                
Intangible assets, net   8,954 $ 3,606          
Capitalized Software Development [Member] | Electronics [Member]                
Accounting Policy [Line Items]                
Intangible assets, net   6,330            
Capitalized Software Development [Member] | Control Devices [Member]                
Accounting Policy [Line Items]                
Intangible assets, net   $ 2,623            
Stoneridge Brazil [Member]                
Accounting Policy [Line Items]                
Percentage ownership in consolidated subsidiary         74.00%      
Percentage of additional noncontrolling interest acquired               26.00%
MSIL                
Accounting Policy [Line Items]                
Equity method investment, ownership percentage   49.00% 49.00% 49.00%        
Equity method investments   $ 13,547 $ 12,701          
Maximum [Member] | Pre-production Costs [Member]                
Accounting Policy [Line Items]                
Property, plant and equipment, useful life   7 years            
Maximum [Member] | Capitalized Software Development [Member]                
Accounting Policy [Line Items]                
Property, plant and equipment, estimated useful lives   P7Y            
Minimum [Member] | Pre-production Costs [Member]                
Accounting Policy [Line Items]                
Property, plant and equipment, useful life   3 years            
Minimum [Member] | Capitalized Software Development [Member]                
Accounting Policy [Line Items]                
Property, plant and equipment, estimated useful lives   P3Y            
Orlaco [Member]                
Accounting Policy [Line Items]                
Payment of earn-out consideration paid within operating activities     5,080          
Earn-out consideration cash payment within financing activities     3,394          
Earn-out consideration           $ 7,500 € 7,500  
Credit Facility [Member]                
Accounting Policy [Line Items]                
Amortization of financing costs   $ 1,079 1,366          
Interest expense, net     $ (275)