Debt instrument covenant default of other debt maximum amount.

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Debt instrument covenant uninsured asset losses maximum amount.

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Increase in maximum borrowing capacity of credit facility

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Line Of Credit Facility Required Minimum Liquidity

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Minimum interest coverage ratio

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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No definition available.

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Identification of whether the entity has been in compliance with any credit facility debt covenants during the period.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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Fair value of the amount outstanding under the credit facility.

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The effective interest rate at the end of the reporting period.

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The effective interest rate during the reporting period.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Weighted average interest rate of long-term debt outstanding calculated at point in time.

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Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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Weighted average interest rate of short-term debt outstanding calculated at point in time.

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Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

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Debt (Narrative) (Details) ¥ in Thousands, kr in Thousands, $ in Thousands		3 Months Ended			12 Months Ended
	Jun. 30, 2020	Mar. 31, 2021 USD ($)	Mar. 31, 2021 SEK (kr)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Mar. 31, 2021 SEK (kr)	Mar. 31, 2021 CNY (¥)	Dec. 31, 2020 USD ($)	Dec. 31, 2020 SEK (kr)	Dec. 31, 2020 CNY (¥)	Jun. 26, 2020 USD ($)	Jun. 05, 2019 USD ($)
Debt Instrument [Line Items]
Borrowings outstanding		$ 153,500						$ 136,000
Subsidiary borrowed		20,500		$ 71,500
Repayments of credit line		3,000		$ 36,500
Cash and cash equivalents		60,508						73,919
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Capitalized deferred financing costs					$ 1,366
Line of credit facility, maximum borrowing capacity												$ 400,000
Increase in maximum borrowing capacity of credit facility												$ 150
Borrowings outstanding		153,500						136,000
Write off of deferred debt issuance cost					$ 275
Debt instrument covenant default of other debt maximum amount		30,000
Debt instrument covenant uninsured asset losses maximum amount		$ 30,000
Revolving Credit Facility [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Long-term debt, weighted average interest rate		2.85%				2.85%	2.85%
Suzhou Short-Term Credit Line [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 7,631					¥ 50,000	7,663
Borrowings outstanding		$ 4,350						$ 4,521
Outstanding credit lines weighted-average interest rate		4.30%				4.30%	4.30%	4.32%	4.32%	4.32%
Suzhou Short-Term Credit Line [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Outstanding credit lines interest rate		5.00%	5.00%
Suzhou Short-Term Credit Line [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Outstanding credit lines interest rate		3.85%	3.85%
Bank Acceptance Draft Credit Line [Member]
Debt Instrument [Line Items]
Credit facility, borrowing capacity		$ 2,289					¥ 15,000	$ 2,299		¥ 15,000
Borrowings outstanding		1,254						414
Letter of Credit [Member]
Debt Instrument [Line Items]
Outstanding letters of credit		$ 1,703						$ 1,720
Stoneridge Brazil Short-Term Notes [Member]
Debt Instrument [Line Items]
Short-term debt, weighted average interest rate		7.07%				7.07%	7.07%
Credit Facility [Member]
Debt Instrument [Line Items]
Credit Facility covenant compliance		The Company was in compliance with all credit facility covenants at March 31, 2021 and December 31, 2020	The Company was in compliance with all credit facility covenants at March 31, 2021 and December 31, 2020
Amendment Number One [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Capitalized deferred financing costs		$ 1,086
Credit facility required minimum liquidity											$ 150,000
Amendment Number One [Member] \| Revolving Credit Facility [Member] \| Quarter Ended December 31, 2020 [Member]
Debt Instrument [Line Items]
Minimum interest coverage ratio								275.00%	275.00%	275.00%
Amendment Number One [Member] \| Revolving Credit Facility [Member] \| Quarter Ended March 31, 2021 [Member]
Debt Instrument [Line Items]
Minimum interest coverage ratio		325.00%				325.00%	325.00%
Amendment Number One [Member] \| Revolving Credit Facility [Member] \| Quarters Ended After March 31, 2021 [Member]
Debt Instrument [Line Items]
Minimum interest coverage ratio											350.00%
Amendment Number One [Member] \| Revolving Credit Facility [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Cash and cash equivalents											$ 130,000
Amendment Number One [Member] \| Revolving Credit Facility [Member] \| Minimum [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
Amendment Three [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 300,000
Stoneridge Brazil [Member] \| Term Loan [Member]
Debt Instrument [Line Items]
Principal repayment in next twelve months		832
Specified Hedge Borrowings [Member] \| Amendment Number One [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Borrowings outstanding		50,000
Specified Hedge Borrowings [Member] \| Amendment Number One [Member] \| Revolving Credit Facility [Member] \| Minimum [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.00%
Electronics [Member] \| Line of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		2,291				kr 20,000		$ 2,435	kr 20,000
Borrowings outstanding								$ 1,591	kr 13,072
Subsidiary borrowed		10,992	kr 95,939
Repayments of credit line		$ 12,490	kr 109,011