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Debt (Narrative) (Details) ¥ in Thousands, kr in Thousands, R$ in Thousands, $ in Thousands |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2020 | Dec. 31, 2020 USD ($) | Dec. 31, 2020 BRL (R$) | Dec. 31, 2020 SEK (kr) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2020 SEK (kr) | Dec. 31, 2020 CNY (¥) | Jun. 26, 2020 USD ($) | Dec. 31, 2019 BRL (R$) | Dec. 31, 2019 CNY (¥) | Jun. 05, 2019 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Credit Facility covenant compliance |  | The Company was in compliance with all credit facility covenants at December 31, 2020 and 2019. | The Company was in compliance with all credit facility covenants at December 31, 2020 and 2019. | The Company was in compliance with all credit facility covenants at December 31, 2020 and 2019. |  |  |  |  |  |  |  |
Borrowings outstanding |  | $ 136,000 |  |  | $ 126,000 |  |  |  |  |  |  |
Subsidiary borrowed |  | 71,500 |  |  | 112,000 | $ 27,500 |  |  |  |  |  |
Repayments of credit line |  | 61,500 |  |  | 82,000 | $ 52,500 |  |  |  |  |  |
Outstanding letters of credit |  | 1,720 |  |  | 1,768 |  |  |  |  |  |  |
Cash and cash equivalents |  | 73,919 |  |  | 69,403 |  |  |  |  |  |  |
2021 |  | 7,673 |  |  |  |  |  |  |  |  |  |
2024 |  | 136,000 |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |  |  |  | $ 150,000
Borrowings outstanding |  | $ 136,000 |  |  | 126,000 |  |  |  |  |  |  |
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% |  |  |  |
Line of Credit [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  | $ 2,435 |  |  | 2,136 |  | kr 20,000 |  |  |  |  |
Line of credit |  |  |  |  | 0 |  |  |  |  |  |  |
Suzhou Short-Term Credit Line [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  | 7,663 |  |  | 5,746 |  |  | ¥ 50,000 |  |  | ¥ 40,000 |
Borrowings outstanding |  | $ 4,521 |  |  | $ 2,154 |  |  |  |  |  |  |
Outstanding credit lines weighted-average interest rate |  | 4.32% |  |  | 4.80% |  | 4.32% | 4.32% |  | 4.80% | 4.80% |
Suzhou Short-Term Credit Line [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Outstanding credit lines interest rate |  | 5.00% | 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% | 3.85% |  |  |  |  |  |  |  |
Bank Acceptance Draft Credit Line [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Credit facility, borrowing capacity |  | $ 2,299 |  |  | $ 2,154 |  |  | ¥ 15,000 |  |  | ¥ 15,000 |
Borrowings outstanding |  | 414 |  |  | 150 |  |  |  |  |  |  |
Stoneridge Brazil?s Bank Overdraft Credit |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary borrowed and repaid |  | 1,306 | R$ 7,150 |  |  |  |  |  |  |  |  |
Amendment Number One [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Capitalized deferred financing costs |  | $ 1,079 |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  | 2.75% |  |  |
Amendment Number One [Member] | Revolving Credit Facility [Member] | Quarter Ended March 31, 2021 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Minimum interest coverage ratio |  |  |  |  |  |  |  |  | 3.25% |  |  |
Amendment Number One [Member] | Revolving Credit Facility [Member] | Quarters Ended After March 31, 2021 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Minimum interest coverage ratio |  |  |  |  |  |  |  |  | 3.50% |  |  |
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% |  |  |  |  |  |  |  |  |  |  |
Stoneridge Brazil [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, weighted average interest rate |  | 6.79% |  |  |  |  | 6.79% | 6.79% |  |  |  |
Stoneridge Brazil [Member] | Line of Credit [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  | $ 1,244 |  |  |  |  |  |  |  | R$ 5,000 |  |
Borrowings outstanding |  |  |  |  | $ 0 |  |  |  |  |  |  |
Stoneridge Brazil [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
2021 |  | 1,561 |  |  |  |  |  |  |  |  |  |
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] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings outstanding |  | 1,591 |  |  |  |  | kr 13,072 |  |  |  |  |
Subsidiary borrowed |  | 38,092 |  | kr 312,921 |  |  |  |  |  |  |  |
Repayments of credit line |  | $ 36,501 |  | kr 299,849 |  |  |  |  |  |  |  |
Stoneridge Brazil Short-Term Obligations [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Short-term debt, weighted average interest rate |  | 8.80% |  |  |  |  | 8.80% | 8.80% |  |  |  |
Stoneridge Brazil Short-Term Obligations [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Short-term debt, weighted average interest rate |  | 5.64% |  |  |  |  | 5.64% | 5.64% |  |  |  |

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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3044-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121566466&loc=d3e6676-107765 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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