Financial Instruments and Fair Value Measurements (Summary of the change in fair value of the Level 3 financial liabilities related to earn-out consideration) (Details) - Earnout Consideration [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial liability, Beginning balance	$ 12,011	$ 18,672
Change in fair value	(633)	469
Foreign currency adjustments	(2,768)	(261)
Earn-out consideration cash payment		(8,474)
Financial liability, Ending balance	8,610	10,406
Orlaco [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial liability, Beginning balance		8,602
Foreign currency adjustments		(128)
Earn-out consideration cash payment		(8,474)
Stoneridge Brazil [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial liability, Beginning balance	12,011	10,070
Change in fair value	(633)	469
Foreign currency adjustments	(2,768)	(133)
Financial liability, Ending balance	$ 8,610	$ 10,406