Business Realignment and Restructurings Realignment Charges Classified by Statement of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Restructuring Cost and Reserve [Line Items]
Total business realignment charges	$ 60	$ 2,583	$ 306	$ 3,187
Cost of Goods Sold [Member]
Restructuring Cost and Reserve [Line Items]
Total business realignment charges	7	926	7	1,012
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Total business realignment charges	52	1,180	264	1,698
Design and Development Expense [Member]
Restructuring Cost and Reserve [Line Items]
Total business realignment charges	1	477	35	477
Control Devices [Member]
Restructuring Cost and Reserve [Line Items]
Total business realignment charges		1,042	192	1,419
Control Devices [Member] | Cost of Goods Sold [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs		603		603
Control Devices [Member] | Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs		190	192	567
Control Devices [Member] | Design and Development Expense [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs		249		249
Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Total business realignment charges	1	1,305	13	1,305
Electronics [Member] | Cost of Goods Sold [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs		323		323
Electronics [Member] | Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs		754		754
Severance benefit			(22)
Electronics [Member] | Design and Development Expense [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs	1	228	35	228
Stoneridge Brazil [Member]
Restructuring Cost and Reserve [Line Items]
Total business realignment charges	59		59	153
Stoneridge Brazil [Member] | Cost of Goods Sold [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs	7		7	86
Stoneridge Brazil [Member] | Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs	$ 52		52	67
Unallocated Corporate [Member]
Restructuring Cost and Reserve [Line Items]
Total business realignment charges		236	42	310
Unallocated Corporate [Member] | Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs		$ 236	$ 42	$ 310