Commitments and Contingencies (Narrative) (Details) R$ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Mar. 31, 2020 BRL (R$)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 BRL (R$)	Dec. 31, 2019 USD ($)
Short-term Debt [Line Items]
Environmental remediation accrued undiscounted liability			$ 235		$ 82
Product warranty and recall accrual			3,059		3,111
Selling, General and Administrative Expenses [Member]
Short-term Debt [Line Items]
Gain on litigation	$ 6,473
Interest Income [Member]
Short-term Debt [Line Items]
Gain on litigation	2,392
Professional Fees [Member]
Short-term Debt [Line Items]
Gain on litigation	$ 990
Letter of Credit [Member]
Short-term Debt [Line Items]
Line of credit			1,489
Stoneridge Brazil [Member] | Civil, labor and other tax contingencies [Member]
Short-term Debt [Line Items]
Loss contingency, estimate of possible loss		R$ 29,300	$ 5,600	R$ 29,200	$ 7,300