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Business Realignment and Restructurings Realignment Charges Classified by Statement of Operations) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]      
Total business realignment charges $ 4,037 $ 1,829 $ 710
Cost of Goods Sold [Member]      
Restructuring Cost and Reserve [Line Items]      
Total business realignment charges 1,231   63
Selling, General and Administrative Expenses [Member]      
Restructuring Cost and Reserve [Line Items]      
Total business realignment charges 2,121 1,829 491
Design and Development Expense [Member]      
Restructuring Cost and Reserve [Line Items]      
Total business realignment charges 685   156
Control Devices [Member]      
Restructuring Cost and Reserve [Line Items]      
Total business realignment charges 1,752 682 169
Control Devices [Member] | Cost of Goods Sold [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs 724    
Control Devices [Member] | Selling, General and Administrative Expenses [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs 745 682 41
Control Devices [Member] | Design and Development Expense [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs 283   128
Electronics [Member]      
Restructuring Cost and Reserve [Line Items]      
Total business realignment charges 1,690 99 63
Electronics [Member] | Cost of Goods Sold [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs 383    
Electronics [Member] | Selling, General and Administrative Expenses [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs 905 99 63
Electronics [Member] | Design and Development Expense [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs 402    
Stoneridge Brazil [Member]      
Restructuring Cost and Reserve [Line Items]      
Total business realignment charges 234   478
Stoneridge Brazil [Member] | Cost of Goods Sold [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs     63
Stoneridge Brazil [Member] | Cost of Goods Sold [Member] | Stoneridge Brazil [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs 124    
Stoneridge Brazil [Member] | Selling, General and Administrative Expenses [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs     387
Stoneridge Brazil [Member] | Selling, General and Administrative Expenses [Member] | Stoneridge Brazil [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs 110    
Stoneridge Brazil [Member] | Design and Development Expense [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs     $ 28
Unallocated Corporate [Member]      
Restructuring Cost and Reserve [Line Items]      
Total business realignment charges 361 1,048  
Unallocated Corporate [Member] | Selling, General and Administrative Expenses [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs $ 361 $ 1,048