Stoneridge (SRI) 10-Q 2 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 27, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	STONERIDGE INC
Entity Central Index Key	1,043,337
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Trading Symbol	sri
Entity Common Stock Shares Outstanding		28,171,209
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2,017

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 50,791	$ 50,389
Accounts receivable, less reserves of $1,173 and $1,630, respectively	144,475	113,225
Inventories, net	78,643	60,117
Prepaid expenses and other current assets	23,264	17,162
Total current assets	297,173	240,893
Long-term assets:
Property, plant and equipment, net	108,919	91,500
Intangible assets, net	78,011	39,260
Goodwill	38,224	931
Investments and other long-term assets, net	17,942	21,945
Total long-term assets	243,096	153,636
Total assets	540,269	394,529
Current liabilities:
Current portion of debt	4,421	8,626
Accounts payable	80,069	62,594
Accrued expenses and other current liabilities	48,258	41,489
Total current liabilities	132,748	112,709
Long-term liabilities:
Revolving credit facility	126,000	67,000
Long-term debt, net	5,102	8,060
Deferred income taxes	20,337	9,760
Other long-term liabilities	31,553	4,923
Total long-term liabilities	182,992	89,743
Shareholders' equity:
Preferred Shares, without par value, 5,000 shares authorized, none issued
Common Shares, without par value, 60,000 shares authorized, 28,966 and 28,966 shares issued and 28,171 and 27,850 shares outstanding at September 30, 2017 and December 31, 2016, respectively, with no stated value
Additional paid-in capital	227,143	206,504
Common Shares held in treasury, 795 and 1,116 shares at September 30, 2017 and December 31, 2016, respectively, at cost	(7,056)	(5,632)
Retained earnings	73,356	45,356
Accumulated other comprehensive loss	(68,914)	(67,913)
Total Stoneridge Inc. shareholders' equity	224,529	178,315
Noncontrolling interest		13,762
Total shareholders' equity	224,529	192,077
Total liabilities and shareholders' equity	$ 540,269	$ 394,529

CONDENSED CONSOLIDATED BALANCE3

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Statement Of Financial Position [Abstract]
Accounts receivable, reserves (in dollars)	$ 1,173	$ 1,630
Preferred shares, authorized	5,000,000	5,000,000
Preferred shares, no par value
Preferred shares, issued	0	0
Common shares, authorized	60,000,000	60,000,000
Common shares, no par value
Common shares, issued	28,966,000	28,966,000
Common shares, outstanding	28,171,000	27,850,000
Common shares held in treasury, shares	795,000	1,116,000

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Net sales	$ 203,582	$ 173,846	$ 617,004	$ 523,365
Costs and expenses:
Cost of goods sold	141,033	124,098	429,890	375,705
Selling, general and administrative	37,277	27,817	107,247	82,836
Design and development	11,976	10,151	35,731	30,912
Operating income	13,296	11,780	44,136	33,912
Interest expense, net	1,508	1,684	4,436	5,038
Equity in earnings of investee	(465)	(307)	(1,200)	(603)
Other expense (income), net	395	(497)	1,190	(722)
Income before income taxes	11,858	10,900	39,710	30,199
Provision for income taxes	3,809	919	13,569	3,114
Net income	8,049	9,981	26,141	27,085
Net loss attributable to noncontrolling interest		(303)	(130)	(2,009)
Net income attributable to Stoneridge, Inc.	$ 8,049	$ 10,284	$ 26,271	$ 29,094
Earnings per share attributable to Stoneridge, Inc.:
Basic (in dollars per share)	$ 0.29	$ 0.37	$ 0.94	$ 1.05
Diluted (in dollars per share)	$ 0.28	$ 0.36	$ 0.92	$ 1.03
Weighted-average shares outstanding:
Basic (in shares)	28,135,705	27,792,469	28,062,438	27,753,015
Diluted (in shares)	28,652,342	28,359,277	28,612,626	28,266,089

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement Of Other Comprehensive Income [Abstract]
Net income		$ 8,049	$ 9,981	$ 26,141	$ 27,085
Less: Net loss attributable to noncontrolling interest			(303)	(130)	(2,009)
Net income attributable to Stoneridge, Inc.		8,049	10,284	26,271	29,094
Other comprehensive income (loss), net of tax attributable to Stoneridge, Inc.:
Foreign currency translation		6,483	(638)	15,822	5,923
Benefit plan liability			(84)		(84)
Unrealized gain (loss) on derivatives	[1]	(138)	(64)	172	(473)
Other comprehensive income, net of tax attributable to Stoneridge, Inc.		6,345	(786)	15,994	5,366
Comprehensive income attributable to Stoneridge, Inc.		$ 14,394	$ 9,498	$ 42,265	$ 34,460
[1]	Net of tax benefit of $(74) and $0 for the three months ended September 30, 2017 and 2016, respectively. Net of tax expense of $93 and $0 for the nine months ended September 30, 2017 and 2016, respectively.

CONDENSED CONSOLIDATED STATEME6

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement Of Other Comprehensive Income [Abstract]
Tax expense (benefit) for unrealized gain (loss) on derivatives	$ (74)	$ 0	$ 93	$ 0

CONDENSED CONSOLIDATED STATEME7

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
OPERATING ACTIVITIES:
Net income	$ 26,141	$ 27,085
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	15,922	14,717
Amortization, including accretion of deferred financing costs	4,993	2,677
Deferred income taxes	6,233	714
Earnings of equity method investee	(1,200)	(603)
Loss (gain) on sale of fixed assets	6	(409)
Share-based compensation expense	5,713	4,587
Tax benefit related to share-based compensation expense	(759)
Change in fair value of contingent consideration	4,645
Changes in operating assets and liabilities, net of effect of business combination:
Accounts receivable, net	(18,232)	(25,486)
Inventories, net	(6,564)	281
Prepaid expenses and other assets	1,530	(5,879)
Accounts payable	11,611	13,991
Accrued expenses and other liabilities	1,079	5,342
Net cash provided by operating activities	51,118	37,017
INVESTING ACTIVITIES:
Capital expenditures	(24,892)	(18,484)
Proceeds from sale of fixed assets	66	652
Business acquisition, net of cash acquired	(77,258)
Net cash used for investing activities	(102,084)	(17,832)
FINANCING ACTIVITIES:
Acquisition of noncontrolling interest, including transaction costs	(1,848)
Revolving credit facility borrowings	91,000
Revolving credit facility payment	(32,000)	(13,000)
Proceeds from issuance of debt	2,557	13,317
Repayments of debt	(10,307)	(21,312)
Other financing costs	(61)	(339)
Repurchase of Common Shares to satisfy employee tax withholding	(2,222)	(1,384)
Net cash provided by (used for) financing activities	47,119	(22,718)
Effect of exchange rate changes on cash and cash equivalents	4,249	(268)
Net change in cash and cash equivalents	402	(3,801)
Cash and cash equivalents at beginning of period	50,389	54,361
Cash and cash equivalents at end of period	50,791	50,560
Supplemental disclosure of cash flow information:
Cash paid for interest	4,286	4,573
Cash paid for income taxes, net	$ 5,745	2,019
Supplemental disclosure of non-cash operating and financing activities:
Bank payment of vendor payables under short-term debt obligations		$ 3,764

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2017
Basis of Presentation [Abstract]
Basis of Presentation	(1) Basis of Presentation The accompanying condensed consolidated financial statements have been prepared by Stoneridge, Inc. (the “Company”) without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). The information furnished in the condensed consolidated financial statements includes normal recurring adjustments and reflects all adjustments, which are, in the opinion of management, necessary for a fair presentation of such financial statements. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) have been condensed or omitted pursuant to the SEC's rules and regulations. The results of operations for the three and nine months ended September 30, 2017 are not necessarily indicative of the results to be expected for the full year. T hese unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in the Company's 2016 Form 10-K.  On January 31, 2017, the Company acquired Exploitatiemaatschappij Berghaaf B.V. (“Orlaco”), an electronics business which designs, manufactures and sells camera-based vision systems, monitors and related products. The acquisition was accounted for as a business combination, and accordingly, the Company’s condensed consolidated financial statements herein include the results of Orlaco from the acquisition date to September 30, 2017. See Note 3 to the condensed consolidated financial statements for additional details regarding the Orlaco acquisition.  The Company had a 74% controlling interest in PST Electronica Ltda. (“PST”) from December 31, 2011 through May 15, 2017 . On May 16, 2017, the Company acquired the remaining 26% noncontrolling interest in PST, which was accounted for as an equity transaction. As such, PST is now a wholly owned subsidiary. See Note 15 to the condensed consolidated financial statements for additional details regarding the acquisition of PST’s noncontrolling interest.  Also, see Note 2 for the impact of the adoption of various accounting standards on the condensed consolidated financial statements herein. 

Recently Issued Accounting Stan

Recently Issued Accounting Standards	9 Months Ended
	Sep. 30, 2017
Recently Issued Accounting Standards [Abstract]
Recently Issued Accounting Standards	(2) Recently Issued Accounting Standards  Recently Adopted Accounting Standards  In August 2017, the Financial Accounting Standards Board (“ FASB ”) issued Accounting Standards Update (“ ASU ”) 2017-12, “ Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities ” , which amends and simplifies existing guidance in order to allow companies to more accurately present the economic effects of risk management activities in the financial statements. As early adoption is permitted, the Company adopted this standard in the third quarter of 2017, which did not have a material impact on its condensed consolidated financial statements.  In May 2017, FASB issued ASU 2017-09, “Compensation-Stock Compensation (Topic 718)”, which clarifies when to account for a change to the terms or conditions of a share-based payment award as a modification. Under the new guidance, modification accounting is required only if the fair value, the vesting conditions or the classification of the award changes as a result of the change in terms or conditions. If an award is not probable of vesting at the time a change is made , the new guidance clarifies that no new measurement date will be required if there is no change to the fair value, vesting conditions, and classification. As early adoption is permitted, the Company adopted this standard in the second quarter of 2017, which did not have a material impact on its condensed consolidated financial statements.  In January 2017, the FASB issued ASU 2017-04, “Simplifying the Test for Goodwill Impairment (Topic 350)”. It eliminates Step 2 from the goodwill impairment test. As a result, an entity should recognize an impairment charge for the amount by which the carrying amount of goodwill exceeds the reporting unit's fair value, not to exceed the carrying amount of goodwill. The Company adopted this standard on January 1, 2017, which did not have a material impact on its condensed consolidated financial statements.  In March 2016, the FASB issued ASU 2016-09, “Compensation - Stock Compensation (Topic 718)” , which is intended to simplify several aspects of the accounting for share-based payment award transactions including how excess tax benefits should be classified in the Company’s condensed consolidated financial statements. The new standard simplifies the treatment of share based payment transactions by recognizing the impact of excess tax benefits or deficiencies related to exercised or vested awards in income tax expense in the period of exercise or vesting. The new standard also modifies the diluted earnings per share calculation using the treasury stock method by eliminating the excess tax benefits or deficiencies from the calculation. These changes have been recognized prospectively. The presentation of excess tax benefits in the condensed stateme nt of consolidated cash flows was also modified to be included with other income tax cash flows as an operating activity. The Company adopted this standard as of January 1, 2017 utilizing the prospective transition method for excess tax benefits in the condensed consolidated statement of cash flows . The Company had unrecognized tax benefits related to share-based payment awards of $1,729 as of December 31, 2016 , which upon adoption was recorded in other long-term assets with a corresponding increase to retained earnings associated with the cumulative effect of the accounting change.  In July 2015, the FASB issued ASU 2015-11, “Simplifying the Measurement of Inventory”, which requires that inventory be measured at the lower of cost or net realizable value. Prior to the issuance of the new guidance, inventory was measured at the lower of cost or market. Replacing the concept of market with the single measurement of net realizable value is intended to reduce cost and complexity. The Company adopted this standard as of January 1, 2017, which did not have a material impact on the its condensed consolidated financial statements or disclosures.  Accounting Standards Not Yet Adopted In January 2017, the FASB issued ASU 2017-01, “Clarifying the Definition of a Business”. It revises the definition of a business and provides a framework to evaluate when an input and a substantive process are present in an acquisition to be considered a business. This guidance is effective for annual periods beginning after December 15, 2017. The Company expects to adopt this standard as of January 1, 2018, which is not expected to have a material impact on its condensed consolidated financial statements. In August 2016, the FASB issued ASU 2016-15, “Statement of Cash Flows - Classification of Certain Cash Receipts and Cash Payments (Topic 230)”, which provides guidance on the presentation and classification of certain cash receipts and cash payments in the statement of cash flows in order to reduce diversity in practice. This ASU is effective for interim and annual periods beginning after December 15, 2017 with early adoption permitted. The Company is currently evaluating the impact of adopting this standard on its condensed consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842)”, which will require that a lessee recognize assets and liabilities on the balance sheet for all leases with a lease term of more than twelve months, with the result being the recognition of a right of use asset and a lease liability. The amendment is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The Company expects to adopt this standard as of January 1, 2019. The Company is currently evaluating the impact of adopting this standard on its condensed consolidated financial statements, which will require right of use assets and lease liabilities be recorded in the condensed consolidated balance sheet for operating leases. In May 2014, the FASB issued ASU 2014-09 “Revenue from Contracts with Customers”, which is the new comprehensive revenue recognition standard that will supersede existing revenue recognition guidance under U.S. GAAP. The standard's core principle is that a company will recognize revenue when it transfers promised goods or services to a customer in an amount that reflects the consideration to which a company expects to be entitled in exchange for those goods or services. To achieve this principle, an entity identifies the contract with a customer, identifies the separate performance obligations in the contract, determines the transaction price, allocates the transaction price to the separate performance obligations and recognizes revenue when each separate performance obligation is satisfied. This ASU allows for both retrospective and prospective methods of adoption. The new standard will become effective for annual and interim periods beginning after December 15, 2017. Currently, the Company does not expect the adoption of this standard to have a material impact on its results of operations or financial position; however, the Company expects expand ed disclosures consistent with the requirements of the new standard. In particular, t he Company does not expect any changes to how it accounts for reimbursable pre-production costs, currently accounted for as a reduction of costs incurred . However, the Company continues to evaluate its contracts with customers analyzing the impact, if any, on revenue from the sale of production parts, particularly in regards to material rights , variable consideration and the impact of termination clauses on the timing of revenue recognition. The Company will adopt this standard January 1, 2018 and expects to use the modified retrospective transition method. Under the modified retrospective method, the Company would recognize the cumulative effect of initially applying the standard as an adjustment to opening retained earnings at the date of initial application.

Acquisition of Orlaco

Acquisition of Orlaco	9 Months Ended
	Sep. 30, 2017
Acquisition of Orlaco [Abstract]
Acquisition of Orlaco	(3) Acquisition of Orlaco  On January 31, 2017 , Stoneridge B.V., an indirect wholly-owned subsidiary of Stoneridge, Inc., entered into and closed an agreement to acquire Orlaco. Orlaco designs, manufactures and sells camera-based vision systems, monitors and related electronic products primarily to the heavy off-road machinery, commercial vehicle, lifting crane and warehousing and logistics industries. Stoneridge and Orlaco jointly developed the MirrorEye mirror replacement system, which is a system solution to improve the safety and fuel economy of commercial vehicles. The MirrorEye system integrates Orlaco’s vision processing technology and Stoneridge’s driver information capabilities as well as the combined software capabilities of both businesses. The acquisition of Orlaco enhances the Stoneridge’s Electronics segment global technical capabilities in vision systems and facilitates entry into new markets. The aggregate consideration for the Orlaco acquisition was €74,939 ( $79,675 ), which included customary estimated adjustments to the purchase price. The Company paid €67,439 ( $71,701 ) in cash, and €7,500 ( $7,974 ) is held in an escrow account for a period of eighteen months to secure the payment obligations of the seller under the terms of the purchase agreement. The purchase price is subject to certain customary adjustments set forth in the purchase agreement. The escrow amount will be transferred promptly following the completion of the escrow period. The Company may also be required to pay an additional amount up to €7,500 as contingent consideration (“earn-out consideration”) if certain performance targets are achieved during the first two years.  The acquisition date fair value of the total consideration transferred consisted of the following:     Cash $ 79,675  Fair value of earn-out consideration and other adjustments 4,208  Total purchase price $ 83,883  The following table summarizes the estimated fair value of the assets acquired and liabilities assumed at the acquisition date (including measurement period adjustments). The purchase price and associated allocation is preliminary pending completion of the valuation of acquired inventory, property, plant and equipment, intangible assets and deferred income taxes and may be subsequently adjusted to reflect final valuation results and purchase price adjustments. Based upon information obtained, certain of the fair value amounts previously estimated were adjusted during the measurement period. These measurement period adjustments related to updated valuation reports and appraisals received from our external valuation specialists, as well as revisions to internal estimates. The changes in estimates recorded at September 30, 2017 include an increase in inventory of $265 ; an increase in intangible assets of $113 ; a decrease in other long-term assets of $684 ; an increase in other current liabilities of $29 ; a decrease in accounts receivable of $201 and a decrease in earn-out consideration of $1,007 . The measurement period and working capital adjustments resulted in a decrease to goodwill of $727 .    At January 31, 2017  Cash $ 2,165  Accounts receivable 7,929  Inventory 9,409  Prepaid and other current assets 298  Property, plant and equipment 6,668  Identifiable intangible assets 38,739  Other long-term assets 6  Total identifiable assets acquired 65,214   Accounts payable 3,020  Other current liabilities 834  Deferred tax liabilities 9,994  Warranty liability 1,462  Total liabilities assumed 15,310  Net identifiable assets acquired 49,904  Goodwill 33,979  Net assets acquired $ 83,883  Assets acquired and liabilities assumed were recorded at estimated fair values based on management's estimates, available information, and reasonable and supportable assumptions. Also, the Company utilized a third-party to assist with certain estimates of fair values, including: · Fair value estimate for inventory was based on a comparative sales method · Fair value estimate for property, plant and equipment was based on appraised values utilizing cost and market approaches · Fair values for intangible assets were based on a combination of market and income approaches, including the relief from royalty method · Fair value for the earn-out consideration was based on a Monte Carlo simulation utilizing forecasted earnings before interest, taxes, depreciation and amortization (“EBITDA”) for the 2017 and 2018 measurement period These fair value measurements are classified within Level 3 of the fair value hierarchy. See Note 6 for details on fair value hierarchy.   Goodwill is calculated as the excess of the fair value of consideration transferred over the fair market value of the identifiable assets and liabilities and represents the future economic benefits arising from other assets acquired that could not be separately recognized. The goodwill is not deductible for income tax purposes. Of the $38,739 of acquired identifiable intangible assets, $27,518 was provisionally assigned to customer lists with a 15 -year useful life; $5,142 was provisionally assigned to trademarks with a 20- year useful life; and $6,079 was provisionally assigned to technology with a 7 - year weighted-average useful life.  The Company recognized $1, 259 of acquisition related costs in the condensed consolidated statement of operations as a component of selling, general and administrative (“SG&A”) expense for the nine months ended September 30, 2017, re spectively . Included in the Company's statement of operations for the three and nine months ended September 30, 2017 are post-acquisition sales of $18,502 and $46,956 , and net income of $1,254 and $1,299 , respectively, related to Orlaco which are included in results of the Electronics segment. The Company’s statement of operations also included $0 and $1,636 of expense in cost of goods sold (“COGS”) for the three and nine months ended September 30, 2017, respect ively, associated with the step- up of the Orlaco inventory to fair value and the $1,823 and $3,926 fair value adjustment for earn-out consideration in SG&A expenses for the three and nine months ended September 30, 2017 , respectively .  The following unaudited pro forma information reflects the Company’s condensed consolidated results of operations as if the acquisition had taken place on January 1, 2016. The unaudited pro forma information is not necessarily indicative of the results of operations that the Company would have reported had the transaction actually occurred at the beginning of these periods, nor is it necessarily indicative of future results.     Three months ended Nine months ended  September 30, September 30,  2017 2016 2017 2016   Net sales $ 203,582 $ 187,626 $ 622,034 $ 566,518  Net income attributable to Stoneridge, Inc. and subsidiaries $ 8,049 $ 11,406 $ 26,375 $ 33,195  

Inventories

Inventories	9 Months Ended
	Sep. 30, 2017
Inventories [Abstract]
Inventories	(4) Inventories Inventories are valued at the lower of cost (using either the first-in, first-out (“FIFO”) or average cost methods) or net realizable value. The Company evaluates and adjusts as necessary its excess and obsolescence reserve on a quarterly basis. Excess inventories are quantities of items that exceed anticipated sales or usage for a reasonable period. The Company has guidelines for calculating provisions for excess inventories based on the number of months of inventories on-hand compared to anticipated sales or usage. Management uses its judgment to forecast sales or usage and to determine what constitutes a reasonable period. Inventory cost includes material, labor and overhead. Inventories consisted of the following:    September 30, December 31,  2017 2016  Raw materials $ 47,840 $ 35,665  Work-in-progress 8,249 7,483  Finished goods 22,554 16,969  Total inventories, net $ 78,643 $ 60,117  Inventory valued using the FIFO method was $ 56,861 and $37,765 at September 30, 2017 and December 31, 2016, respectively. Inventory valued using the average cost method was $21,782 and $22,352 at September 30, 2017 and December 31, 2016, respectively.  .

Goodwill and Intangibles

Goodwill and Intangibles	9 Months Ended
	Sep. 30, 2017
Goodwill and Intangibles [Abstract]
Goodwill and Intangibles	(5) Goodwill and Intangibles  Goodwill  Goodwill was $38,224 and $931 at September 30, 2017 and December 31, 2016 , respectively, all of which relate s to the Electronics segment. The increase in goodwill is rel ated to the Orlaco acquisition as further discussed in Note 3. Goodwill is not amortized, but instead is tested for impairment at least annually, or earlier when events and circumstances indicate that it is more likely than not that such assets have been impaired.  Intangibles    Acquisition Accumulated  As of September 30, 2017 cost amortization Net  Customer lists $ 58,470 $ (12,196) $ 46,274  Tradenames 24,305 (5,592) 18,713  Technology 17,849 (4,825) 13,024  Other 42 (42) -  Total $ 100,666 $ (22,655) $ 78,011     Acquisition Accumulated  As of December 31, 2016 cost amortization Net  Customer lists $ 27,476 $ (9,138) $ 18,338  Tradenames 18,116 (4,558) 13,558  Technology 10,862 (3,498) 7,364  Other 41 (41) -  Total $ 56,495 $ (17,235) $ 39,260    The Co mpany recorded amortization expense of $1,711 and $869 related to finite-lived intangible assets for the three month period ended September 30 , 2017 and 2016, respectively, and $4,750 and $2,402 for the nine month period ended September 30, 2017 and 2016, respectively. The Company currently estimates annual amortization expense to be $6,500 for 2017 and $6,800 for 2018, 2019 , 2020 and 2021 . 

Financial Instruments and Fair

Financial Instruments and Fair Value Measurements	9 Months Ended
	Sep. 30, 2017
Financial Instruments and Fair Value Measurements [Abstract]
Financial Instruments and Fair Value Measurements	(6) Financial Instruments and Fair Value Measurements Financial Instruments A financial instrument is cash or a contract that imposes an obligation to deliver, or conveys a right to receive cash or another financial instrument. The carrying values of cash and cash equivalents, accounts receivable and accounts payable are considered to be representative of fair value because of the short maturity of these instruments. Derivative Instruments and Hedging Activities On September 30, 2017, the Company had open foreign currency forward contracts which are used solely for hedging and not for speculative purposes. Management believes that its use of these instruments to reduce risk is in the Company's best interest. The counterparties to these financial instruments are financial institutions with investment grade credit ratings.  Foreign Currency Exchange Rate Risk The Company conducts business internationally and therefore is exposed to foreign currency exchange rate risk. The Company uses derivative financial instruments as cash flow and fair value hedges to manage its exposure to fluctuations in foreign currency exchange rates by reducing the effect of such fluctuations on foreign currency denominated intercompany transactions, inventory purchases and other foreign currency exposures. The currencies hedged by the Company during 2017 and 2016 included the euro and Mexican peso. In addition, the Company hedged the U.S. dollar against the Swedish krona and euro on behalf of its European subsidiaries in 2016. These forward contracts were executed to hedge forecasted transactions and certain transactions have been accounted for as cash flow hedges. As such, the effective portion of the unrealized gain or loss was deferred and reported in the Company’s condensed consolidated balance sheets as a component of accumulated other comprehensive loss. The cash flow hedges were highly effective. The effectiveness of the transactions has been and will be measured on an ongoing basis using regression analysis and forecasted future purchases of the currency.  In certain instances, the foreign currency forward contracts do not qualify for hedge accounting or are not designated as hedges, and therefore are marked-to-market with gains and losses recognized in the Company's condensed consolidated statement of operations as a component of other expense (income) , net. The Company's foreign currency forward contracts offset a portion of the gains and losses on the underlying foreign currency denominated transactions as follows: Euro-denominated Foreign Currency Forward Contract At September 30, 2017 and December 31, 2016, the Company held foreign currency forward contracts with underlying notional amounts of $1,187 and $1,601 , respectively, to reduce the exposure related to the Company's euro-denominated intercompany loans. The current contract expires in June 2018 . The euro-denominated foreign currency forward contract was not designated as a hedging instrument. The Company recognized a loss of $36 and a gain of $ 1 for the three months ended September 30, 2017 and 201 6, respectively, in the condensed consolidated statements of operations as a component of other expense (income), net related to the euro-denominated contract. For the nine months ended September 30, 2017 and 2016, the Company recognized a loss of $164 and $38 respectively, related to this contract.   Mexican Peso-denominated Foreign Currency Forward Contracts – Cash Flow Hedge The Company holds Mexican peso-denominated foreign currency forward contracts with notional amounts at September 30, 2017 of $1,399 which expire ratably on a monthly basis from October 2017 through December 2017, compared to a notional amount of $5,699 at December 31, 2016.  The Company evaluated the effectiveness of the Mexican peso-denominated foreign currency forward contracts held as of September 30 , 2017 and December 31, 2016 and concluded that the hedges were highly effective.   The notional amounts and fair values of derivative instruments in the condensed consolidated balance sheets were as follows:     Prepaid expenses Accrued expenses and  Notional amounts (A) and other current assets other current liabilities  September 30, December 31, September 30, December 31, September 30, December 31,  2017 2016 2017 2016 2017 2016  Derivatives designated as hedging instruments:  Cash flow hedges:  Forward currency contracts $ 1,399 $ 5,699 $ 237 $ - $ - $ 28  Derivatives not designated as hedging instruments:  Forward currency contracts $ 1,187 $ 1,601 $ - $ - $ 37 $ 3    (A) Notional amounts represent the gross contract of the derivatives outstanding in U.S. dollars.  Gross amounts recorded for the cash flow hedges in other comprehensive income (loss) and in net income for the three months ended September 30 are as follows:     Gain (loss) reclassified from  Gain (loss) recorded in other other comprehensive income  comprehensive income (loss) (loss) into net income (A)  2017 2016 2017 2016  Derivatives designated as cash flow hedges:  Forward currency contracts $ 56 $ (129) $ 268 $ (65)   Gross amounts recorded for the cash flow hedges in other comprehensive income (loss) and in net income for the nine months ended September 30 are as follows:     Gain (loss) reclassified from  Gain (loss) recorded in other other comprehensive income  comprehensive income (loss) (loss) into net income (A)  2017 2016 2017 2016  Derivatives designated as cash flow hedges:  Forward currency contracts $ 717 $ (656) $ 452 $ (183)  (A) Gains and losses reclassified from other comprehensive income (loss) into net income were recognized in cost of goods sold in the Company's condensed consolidated statements of operations.  The net deferred gain of $ 237 on the cash flow hedge derivatives will be reclassified from other comprehensive income (loss) to the condensed consolidated statements of operations through December 2017.  Fair Value Measurements The Company’s assets and liabilities are measured at fair value on a recurring basis and are categorized using the three levels of the fair value hierarchy based on the reliability of the inputs used. Fair values estimated using Level 1 inputs consist of quoted prices in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date. Fair values estimated using Level 2 inputs, other than quoted prices, are observable for the asset or liability, either directly or indirectly and include among other things, quoted prices for similar assets or liabilities in markets that are active or inactive as well as inputs other than quoted prices that are observable. For forward currency contracts , inputs include foreign currency exchange rates . Fair values estimated using Level 3 inputs consist of significant unobservable inputs.  The following table presents our assets and liabilities that are measured at fair value on a recurring basis and are categorized using the three levels of the fair value hierarchy based on the reliability of inputs used.     September 30, 2017 December 31, 2016  Fair values estimated using  Level 1 Level 2 Level 3  Fair value inputs inputs inputs Fair value  Financial assets carried at fair value:  Forward currency contracts $ 237 $ - $ 237 $ - $ -  Total financial assets carried at fair value $ 237 $ - $ 237 $ - $ -   Financial liabilities carried at fair value:  Forward currency contracts $ 37 $ - $ 37 $ - $ 31  Earn-out consideration 18,295 - - 18,295 -  Total financial liabilities carried at fair value $ 18,332 $ - $ 37 $ 18,295 $ 31  The following table sets forth a summary of the change in fair value of the Company’s Level 3 financial liabilities related to earn-out consideration that are measured at fair value on a recurring basis.     Orlaco PST Total  Balance at December 31, 2016 $ - $ - $ -  Fair value on acquisition date 3,243 10,180 13,423  Change in fair value 3,926 719 4,645  Foreign currency adjustments 408 (181) 227  Balance at September 30, 2017 $ 7,577 $ 10,718 $ 18,295  The earn-out considerations related to Orlaco and PST are recorded within other long-term liabilities on the condensed consolidated balance sheet.  The increase in fair value of earn-out consideration related to the Orlaco acquisition is primarily due to actual performance exceeding forecasted performance as well as the reduced time from the current period end to the payment date and foreign currency. The increase in fair value of earn-out consideration for PST was due to the reduced time from the current period end to the payment date, which was partially offset by foreign currency translation. The fair value of the Orlaco and PST earn-out consideration is based on forecasted EBITDA during the performance periods.  There were no transfers in or out of Level 3 from other levels in the fair value hierarchy for the nine months ended September 30, 2017.  Except for the fair value of assets acquired and liabilities assumed related to the Orlaco acquisition discussed in Note 3, there were no non-recurring fair value measurements for the periods presented.

Share-Based Compensation

Share-Based Compensation	9 Months Ended
	Sep. 30, 2017
Share-Based Compensation [Abstract]
Share-Based Compensation	(7) Share-Based Compensation Compensation expense for share-based compensation arrangements, which is recognized in the condensed consolidated statements of operations as a component of SG&A expenses, was $1,648 and $1,699 for the three months ended September 30 , 2017 and 2016, respectively. For the nine months ended September 30, 2017 total share-based compensation was $5,713 compared to $4,587 for the nine months ended September 30, 2016. The nine months ended September 30, 2017 included expenses related to higher attainment of performance based awards and accelerated expense associated with the retirement of eligible employee s. The nine months ended September 30, 2016 included expenses related to modification of the retirement notice provisions of certain awards. 

Debt

Debt	9 Months Ended
	Sep. 30, 2017
Debt [Abstract]
Debt	(8) Debt  Debt consisted of the following at September 30, 2017 and December 31, 2016:    September 30, December 31, Interest rates at  2017 2016 September 30, 2017 Maturity  Revolving Credit Facility  Credit Facility $ 126,000 $ 67,000 2.49% September 2021   Debt  PST short-term obligations - 5,097  PST long-term notes 9,475 11,452 10.0% - 13.4% 2019 -2021  Other 48 137  Total debt 9,523 16,686  Less: current portion (4,421) (8,626)  Total long-term debt, net $ 5,102 $ 8,060     Revolving Credit Facility On November 2, 2007, the Company entered into an asset-based credit facility, which permits borrowing up to a maximum level of $100,000 . The Company entered into an Amended and Restated Credit and Security Agreement and a Second Amended and Restated Credit and Security Agreement on September 20, 2010 and December 1, 2011, respectively.  On September 12, 2014, the Company entered into a Third Amended and Restated Credit Agreement (the “Amended Agreement” or “Credit Facility”). The Amended Agreement provides for a $300,000 revolving credit facility, which replaced the Company’s existing $100,000 asset-based credit facility and includes a letter of credit subfacility, swing line subfacility and multicurrency subfacility. The Amended Agreement also has an accordion feature which allows the Company to increase the availability by up to $80,000 upon the satisfaction of certain conditions. The Amended Agreement extended the termination date to September 12, 2019 from December 1, 2016. On March 26, 2015, the Company entered into Amendment No. 1 to the Amended Agreement which modified the definition of Consolidated EBITDA to allow for the add back of cash premiums and other non-cash charges related to the amendment and restatement of the Amended Agreement and the early extinguishment of the Company’s 9.5% Senior Secured Notes. Consolidated EBITDA is used in computing the Company’s leverage ratio and interest coverage ratio which are covenants within the Amended Agreement. On February 23, 2016, the Company entered into Amendment No. 2 to the Amended Agreement which amended and waived any default or potential defaults with respect to the pledging as collateral additional shares issued by a wholly owned subsidiary and newly issued shares associated with the formation of a new subsidiary. On August 12, 2016 , the Company entered into Amendment No. 3 to the Amended Agreement which extended of the expiration date of the Agreement by two years to September 12, 2021 , increased the borrowing sub-limit for the Company’s foreign subsidiaries by $30,000 to $80,000 , increased the basket of permitted loans and investments in foreign subsidiaries by $5,000 to $30,000 , and provided additional flexibility to the Company for certain permitted corporate transactions involving its foreign subsidiaries as defined in the Agreement. As a result of Amendment No. 3, the Company capitalized deferred financing costs of $339 , which will be amortized over the remaining term of the Credit Facility. On January 30, 2017, the Company entered into Consent and Amendment No. 4 to the Amended Agreement which amended certain definitions, schedules and exhibits of the Credit Facility, consented to a Dutch Reorganization, and consented to the Orlaco acquisition. As a result of Amendment No. 4, the Company capitalized deferred financing costs of $61 , which will be amortized over the remaining term of the Credit Facility.  Borrowings under the Amended Agreement bear interest at either the Base Rate, as defined, or the LIBOR Rate, at the Company’s option, plus the applicable margin as set f orth in the Amended Agreement. The Company is also subject to a commitment fee ranging from 0.20% to 0.35% based on the Company’s leverage ratio. The Amended Agreement requires the Company to maintain a maximum leverage ratio of 3.00 to 1.00, and a minimum interest coverage ratio of 3.50 to 1.00 and places a maximum annual limit on capital expenditures. The Amended Agreement also contains other affirmative and negative covenants and events of default that are customary for credit arrangements of this type including covenants which place restrictions and/or limitations on the Company’s ability to borrow money, make capital expenditures and pay dividends.  Borrowings outstanding on the Credit Facility were $126,000 and $67,000 at September 30, 2017 and December 31, 2016, respectively. Borrowings increased under the Credit Facility to fund the Orlaco acquisition described in Note 3 during the first quarter of 2017 which were partially offset by subsequent voluntary principal repayments.  The Company was in compliance with all Credit Facility covenants at September 30, 2017 and December 31, 2016 .  The Company also has outstanding letters of credit of $3,367 and $3,399 at September 30, 2017 and December 31, 2016, respectively.  Debt PST maintains several long-term notes used for working capital purposes which have fixed interest rates. As of September 30, 2017 PST did not have any short-term obligations. The weighted-average interest rates of long-term debt of PST at September 30, 2017 was 11.7% . Depending on the specific note, interest is payable either monthly or annually. Principal repayments on PST debt at September 30, 2017 are as follows: $ 4,373 from October 2017 through September 2018, $ 1,211 from October 2018 through December 2018, $ 2,685 in 2019, $ 629 in 20 20, and $577 in 2021 . PST was in compliance with all debt covenants at September 30, 2017 and December 31, 2016 .  The Company's wholly-owned subsidiary located in Stockholm, Sweden, has an overdraft credit line which allows overdrafts on the subsidiary's bank account up to a maximum level of 20,000 Swedish krona, or $2,455 and $2,196 , at September 30, 2017 and December 31, 2016, respectively. At September 30, 2017 and December 31, 2016, there was no balance outstanding on this overdraft credit line.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Earnings Per Share	(9) Earnings Per Share Basic earnings per share was computed by divi ding net income by the weighted- average number of Common Shares outstand ing for each respective period. Diluted earnings per share was calculated by dividing net income by the weighted-average of all potentially dilutive Common Shares that were outstanding during the periods presented. As the Company adopted ASU 2016-09 on January 1, 2017 utilizing the prospective transition method, the weighted-average dilutive Common Shares calculation excludes the excess tax benefit from the treasury stock method for the three and nine months ended September 30, 2017, while the calculation includes the excess tax benefits using the treasury stock method for the three and nine months ended September 30, 2016.  Weighted-average Common Shares outstanding used in calculating basic and diluted earnings per share were as follows:    Three months ended Nine months ended  September 30, September 30,  2017 2016 2017 2016  Basic weighted-average Common Shares outstanding 28,135,705 27,792,469 28,062,438 27,753,015  Effect of dilutive shares 516,637 566,808 550,188 513,074  Diluted weighted-average Common Shares outstanding 28,652,342 28,359,277 28,612,626 28,266,089  There were no performance- based rest ricted Common Shares outstanding at September 30, 2017 or 2016. There were 781,977 and 843,140 performance-based right to receive Common Shares outstanding at September 30, 2017 and 2016, respectively. These right to receive Common Shares are included in the computation of diluted earnings per share based on the number of Common Shares that would be issuable if the end of the quarter were the end of the contingency period .

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Loss by Component	9 Months Ended
	Sep. 30, 2017
Changes in Accumulated Other Comprehensive Loss by Component [Abstract]
Changes in Accumulated Other Comprehensive Loss by Component	  ( 10 ) Changes in Accumulated Other Comprehensive Loss by Component  Changes in accumulated other comprehensive loss for the three months ended September 30 , 2017 and 2016 were as follows:    Foreign Unrealized Benefit  currency gain (loss) plan  translation on derivatives adjustment Total  Balance at July 1, 2017 $ (75,551) $ 292 $ - $ (75,259)   Other comprehensive income before reclassifications 6,483 36 - 6,519  Amounts reclassified from accumulated other  comprehensive loss - (174) - (174)  Net other comprehensive income (loss), net of tax 6,483 (138) - 6,345  Balance at September 30, 2017 $ (69,068) $ 154 $ - $ (68,914)   Balance at July 1, 2016 $ (63,735) $ (19) $ 84 $ (63,670)   Other comprehensive loss before reclassifications (638) (129) - (767)  Amounts reclassified from accumulated other  comprehensive loss - 65 (84) (19)  Net other comprehensive loss, net of tax (638) (64) (84) (786)   Balance at September 30, 2016 $ (64,373) $ (83) $ - $ (64,456)               Changes in accumulated other comprehensive loss for the nine months ended September 30 , 2017 and 2016 were as follows:     Foreign Unrealized Benefit  currency gain (loss) plan  translation on derivatives adjustment Total  Balance at January 1, 2017 $ (67,895) $ (18) $ - $ (67,913)   Other comprehensive income before reclassifications 15,822 466 - 16,288  Amounts reclassified from accumulated other  comprehensive loss - (294) - (294)  Net other comprehensive income, net of tax 15,822 172 - 15,994  Reclassification of foreign currency translation associated  with noncontrolling interest acquired (16,995) - - -  Balance at September 30, 2017 $ (69,068) $ 154 $ - $ (68,914)   Balance at January 1, 2016 $ (70,296) $ 390 $ 84 $ (69,822)   Other comprehensive income (loss) before reclassifications 5,923 (656) - 5,267  Amounts reclassified from accumulated other  comprehensive loss - 183 (84) 99  Net other comprehensive income (loss), net of tax 5,923 (473) (84) 5,366   Balance at September 30, 2016 $ (64,373) $ (83) $ - $ (64,456) 

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies [Abstract]
Commitments and Contingencies	  (11 ) Commitments and Contingencies In the ordinary course of business, the Company is subject to a broad range of claims and legal proceedings that relate to contractual allegations, product liability, tax audits, patent infringement, employment-related matters and environmental matters. The Company establishes accruals for matters which it believes that losses are probable and can be reasonably estimable. Although it is not possible to predict with certainty the outcome of these matters, the Company is of the opinion that the ultimate resolution of these matters will not have a material adverse effect on its consolidated results of operations or financial position. As a result of environmental studies performed at the Company’s former facility located in Sarasota, Florida, the Company became aware of soil and groundwater contamination at the site. The Company engaged an environmental engineering consultant to assess the level of contamination and to develop a remediation and monitoring plan for the site. Soil remediation at the site was completed during the year ended December 31, 2010. As the remedial action plan has been approved by the Florida Department of Environmental Protection, groundwater remediation began in the fourth quarter of 2015. During the three and nine months ended September 30 , 2017 and 2016 , environmental remediation costs incurred were immaterial. At September 30, 2017 and December 31, 201 6 , the Company accrued a remaining undiscounted liability of $267 and $446 , respectively, related to future remediation costs. At September 30, 2017 and December 31, 201 6 , $218 and $370 , r espectively, were recorded as a component of accrued expenses and other current liabilities in the condensed consolidated balance sheets while the remaining amount was recorded as a component of other long-term liabilities . C osts associated with the recorded liability will be incurred to complete the groundwater remediation, with the balance relating to monitoring costs to be incurred over multiple years. The recorded liability is based on assumptions in the remedial action plan. Although the Company sold the Sarasota facility and related property in December 2011, the liability to remediate the site contamination remains the responsibility of the Company. Due to the ongoing site remediation, the closing terms of the sale agreement included a requirement for the Company to maintain a $2,000 letter of credi t for the benefit of the buyer.  During the third quarter of 2017, the Company resolved a legal proceeding, Verde v. Stoneridge, Inc. et al ., that was pending in the United States District Court for the Eastern District of Texas, Cause No. 6:14-cv-00225- KNM. The Plaintiff filed this putative class action against the Company and others on March 26, 2014. The Plaintiff had alleged that the Company was involved in the vertical chain of manufacture, distribution, and sale of a control device (“CD”) that was incorporated into a Dodge Ram truck purchased by Plaintiff in 2006. Plaintiff had alleged that the Company breached express warranties and indemnification provisions by supplying a defective CD that was not capable of performing its intended function. In May 2017, the District Court denied Plaintiff’s motion for class certification. On October 2, 2017, the Company and Plaintiff agreed to settle this matter, and the Plaintiff filed a motion with the Court requesting dismissal of the matter with prejudice. The settlement amount was $3 .  Royal v. Stoneridge, Inc. et al. is a legal proceeding currently pending in the United States District Court for the Western District of Oklahoma, Case No. 5:14-cv-01410-F. Plaintiffs filed this putative class action against the Company, Stoneridge Control Devices, Inc., and others on December 19, 2014. Plaintiffs allege that the Company was involved in the vertical chain of manufacture, distribution, and sale of a CD that was incorporated into Dodge Ram trucks purchased by Plaintiffs between 1999 and 2006. Plaintiffs allege that the Company and Stoneridge Control Devices, Inc. breached various express and implied warranties, including the implied warranty of merchantability. Plaintiffs also seek indemnity from the Company and Stoneridge Control Devices, Inc. The putative class consists of all owners of vehicles equipped with the subject CD, which includes various Dodge Ram trucks and other manual transmission vehicles manufactured from 1997–2007, which Plaintiffs allege is more than one million vehicles. Plaintiffs seek recovery of economic loss damages associated with inspecting and replacing the allegedly defective CD, diminished value of the subject CDs and the trucks in which they were installed, and attorneys’ fees and costs. On September 28, 2017, the Company reached an agreement with Plaintiffs to settle the matter. Under the terms of the settlement, which remains subject to approval by the Court, the Company will provide a replacement CD to each member of the settlement class who files a claim form with evidence of eligibility to participate. The terms of the proposed settlement do not require the Company to provide members of the settlement class with any cash payments or to reimburse any installation costs associated with replacement of the CDs. Counsel for Plaintiffs and the settlement class will file a motion with the Court requesting an award of attorneys’ fees and costs in an amount not to exceed $375 , and the Company has agreed not to object to any request that does not exceed $375 and to pay the amount of any award that does not exceed $375 . Counsel for Plaintiffs and the settlement class will also file a motion requesting incentive payments to each of the three named Plaintiffs in an amount not to exceed $5 each, and the Company has agreed not to object to any request that does not exceed $15 total and to pay the amount of any award that does not exceed $15 total. The total cost of the settlement remains uncertain because it is difficult to predict how many members of the proposed settlement class will request a replacement CD. The Company believes the likelihood of loss is probable and reasonably estimable (although not certain), and therefore a liability of $525 for these claims has been recorded as a component of accrued expenses and other current liabilities at September 30, 2017 .  On May 24, 2013, the State Revenue Services of São Paulo issued a tax deficiency notice against PST claiming that the vehicle tracking and monitoring services it provides should be classified as communication services, and therefore subject to the State Value Added Tax – ICMS. The State Revenue Services assessment imposed the 25.0% ICMS tax on all revenues of PST related to the vehicle tracking and monitoring services rendered during the period from January 2009 through December 2010. The Brazilian real (“R$”) and U.S. dollar equivalent (“$”) of the aggregate tax assessment is approximately R$99,100 ( $31,300 ) which is comprised of Value Added Tax – ICMS of R$13,200 ( $4,200 ) interest of R$74,500 ( $23,500 ) and penalties of R$11,400 ( $3,600 ) .  The Company believes that the vehicle tracking and monitoring services are non-communication services, as defined under Brazilian tax law, subject to the municipal ISS tax, not communication services subject to state ICMS tax as claimed by the State Revenue Services of São Paulo. PST has, and will continue to collect the municipal ISS tax on the vehicle tracking and monitoring services in compliance with Brazilian tax law and will defend its tax position. PST has received a legal opinion that the merits of the case are favorable to PST, determining among other things that the imposition on the subsidiary of the State ICMS by the State Revenue Services of São Paulo is not in accordance with the Brazilian tax code. The Company believes, based on the legal opinion of the Company’s Brazilian legal counsel and the results of the Brazil Administrative Court's ruling in favor of another vehicle tracking and monitoring company related to the tax deficiency notice it received, the likelihood of loss is reasonably possible, but not probable , although it may take years to resolve. As a result of the above, as of September 30, 2017 and December 31, 201 6 , no accrual has been recorded with respect to the tax assessment. An unfavorable judgment on this issue for the years assessed and for subsequent years could result in significant costs to PST and adversely affect its results of operations. There have been no significant changes to the facts and circumstances related to this notice for the three months ended September 30, 2017 . In addition, PST has civil, labor and other tax contingencies for which the likelihood of loss is deemed to be reasonably possible, but not probable, by the Company’s legal advisors in Brazil. As a result, no provision has been recorded with respect to these contingencies, which amounted to R$34,900 ( $11,000 ) and R$31,800 ( $9,800 ) at September 30, 2017 and December 31, 201 6 , respectively. An unfavorable outcome on these contingencies could result in significant cost to PST and adversely affect its results of operations.   Product Warranty and Recall Amounts accrued for product warranty and recall claims are established based on the Company's best estimate of the amounts necessary to settle existing and future claims on products sold as of the balance sheet dates. These accruals are based on several factors including past experience, production changes, industry developments and various other considerations including insurance coverage. The Company can provide no assurances that it will not experience material claims or that it will not incur significant costs to defend or settle such claims beyond the amounts accrued or beyond what the Company may recover from its suppliers. The current portion of product warranty and recall is included as a component of accrued expenses and other current liabilities in the condensed consolidated balance sheets. Product warranty and recall included $3,481 and $2,617 of a long-term liability at September 30, 2017 and December 31, 201 6 , respectively, which is included as a component of other long-term liabilities in the condensed consolidated balance sheets.       The following provides a reconciliation of changes in product warranty and recall liability:    Nine months ended September 30 2017 2016  Product warranty and recall at beginning of period $ 9,344 $ 6,419  Accruals for products shipped during period 6,408 3,010  Assumed warranty liability related to Orlaco 1,462 -  Aggregate changes in pre-existing liabilities due to claim developments 1,616 (272)  Settlements made during the period (9,062) (1,332)  Product warranty and recall at end of period $ 9,768 $ 7,825 

Business Realignment and Corpor

Business Realignment and Corporate Headquarter Relocation	9 Months Ended
	Sep. 30, 2017
Business Realignment and Corporate Headquarter Relocation [Abstract]
Business Realignment and Corporate Headquarter Relocation	(1 2 ) Business Realignment and Corporate Headquarter Re location  Business Realignment  The Company regularly evaluates the performance of its businesses and cost structures, including personnel, and makes necessary changes thereto in order to optimize its results. The Company also evaluates the required skill sets of its personnel and periodically makes strategic changes. As a consequence of these actions, the Company incurs severance related costs which are referred to as business realignment charges.  Business realignment charges by reportable segment were as follows:     Three months ended Nine months ended  September 30, September 30,  2017 2016 2017 2016  Electronics (A) $ 16 $ - $ 72 $ 1,180  PST (B) 37 211 475 1,242  Total business realignment charges $ 53 $ 211 $ 547 $ 2,422  (A) Severance costs for the three and nine months ended September 30 , 2017 related to SG&A were $16 . Severan ce costs for the nine months ended September 30, 2017 related to COGS were $56 . Severance costs for the nine months ended September 30, 2016 related to SG&A and design and development (“D&D”) were $196 and $984 , respectively.  (B) Severance costs for the three months ended September 30 , 2017 related to COGS, SG&A and D&D were $17 , $19 and $1 , respectively. Severance costs for the three months ended September 30, 2016 related to COGS and SG&A were $20 and $191 , respectively. Severance costs for the nine months ended September 30 , 2017 related t o COGS, SG&A and D&D were $355, $119 and $1 , respectively. Severance costs for the nine months ended September 30, 2016 related to COGS, SG&A and D&D were $307 , $819 and $116 , respectively.  Business realignment charges classified by statement of operations line item were as follows:     Three months ended Nine months ended  September 30, September 30,  2017 2016 2017 2016  Cost of goods sold $ 17 $ 20 $ 411 $ 307  Selling, general and administrative 35 191 135 1,015  Design and development 1 - 1 1,100  Total business realignment charges $ 53 $ 211 $ 547 $ 2,422     Corporate Headquarter Relocation  In March 2016 , the Company announced the relocation of its corporate headquarters from Warren, Ohio to Novi, Michigan. As a result, the Company incurred relocation costs of $726 and $998 for the three and nine months ended September 30, 2016 which were recorded within SG&A expenses in the condensed consolidated statements of o perations.  In connection with the headquarter relocation, t he Company was approved for a Michigan Business Development Program grant of up to $1,400 based upon the number of new jobs created in Michigan through 2021 . As a result of the attainment of the first milestone , grant income of $338 was recognized for the nine months ended September 30, 2 017 within SG&A expense in the c onden sed consolidated statements of o perations.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2017
Income Taxes [Abstract]
Income Taxes	(13 ) Income Taxes  The Company computes its consolidated income tax provision each quarter based on a projected annual effective tax rate, as required. The Company is required to reduce deferred tax assets by a valuation allowance if, based on all available evidence, it is considered more likely than not that some portion or all of the benefit of the deferred tax assets will not be realized in future periods. The Company also records the income tax impact of certain discrete, unusual or infrequently occurring items including changes in judgment about valuation allowances and effects of changes in tax laws or rates, in the interim period in which they occur.  When a company maintains a valuation allowance in a particular jurisdiction, no net income tax expense (benefit) will typically be provided on income (loss) for that jurisdiction on an annual basis. Jurisdictions with projected income that maintain a valuation allowance typically will form part of the projected annual effective tax rate calculation discussed above. However, jurisdictions with a projected loss for the year that maintain a valuation allowance are excluded from the projected annual effective income tax rate calculation. Instead, the income tax expense (benefit) for these jurisdictions is computed separately.  The actual year to date income tax expense (benefit) is the product of the most current projected annual effective income tax rate and the actual year to date pre-tax income (loss) adjusted for any discrete tax items. The income tax expense (benefit) for a particular quarter, except for the first quarter, is the difference between the year to date calculation of income tax expense (benefit) and the year to date calculation for the prior quarter.  Therefore, the actual effective income tax rate during a particular quarter can vary significantly based upon the jurisdictional mix and timing of actual earnings compared to projected annual earnings, permanent items, earnings for those jurisdictions that maintain a valuation allowance, tax associated with jurisdictions excluded from the projected annual effective income tax rate calculation and discrete items.  The Company recognized income tax expense of $ 3,809 and $919 for U.S. federal, state and foreign income taxes for the three months ended September 30, 2017 and 2016, respectively. The increase in income tax expense for the three months ended September 30, 2017 compared to the same period for 2016 was primarily related to the release of the U.S. federal, certain state and foreign valuation allowances in the fourth quarter of 2016 that were previously recorded against certain deferred tax assets . T he effective tax rate increased to 32.1% in the third quarter of 2017 from 8.4% in the third quarter of 2016 primarily due the continued strong performance of the U.S. operations, which due to a full valuation allowance positively impacted the effective tax rate in 2016, as well as the impact in the third quarter of 2017 of the non-deductible fair value adjustment to earn-out consideration s related to the Orlaco and PST acquisition s.  The Company recognized income tax expense of $13,569 and $3, 114 from continuing operations for U.S. federal, state and foreign income taxes for the nine months ended September 30, 2017 and 2016, respectively. The increase in tax expense for the nine months ended September 30, 2017 compared to the same period for 2016 was primarily due to the release of the U.S. federal, certain state and foreign valuation allowances in the fourth quarter of 2016 that were previously recorded against certain deferred tax assets. The effective tax rate increased to 34.2% in the first nine months of 2017 from 10.3% in the first nine months of 2016 primarily due to the continued strong performance of the U.S. operations, which due to a full valuation allowance, favorably impacted the effective tax rate in 2016, as well as the impact in 2017 of the non-deductible fair value adjustment to earn-out considerations related to the Orlaco and PST acquisitions. 

Segment Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Segment Reporting	(1 4 ) Segment Reporting Operating segments are defined as components of an enterprise that are evaluated regularly by the Company's chief operating decision maker in deciding how to allocate resources and in assessing performance. The Company's chief o perating decision maker is the Chief Executive O fficer. The Company has three reportable segments , Control Devic es, Electronics, and PST , which also represent its operating segments. The Control Devices reportable segment produces sensors, switches, valves and actuators. The Electronics reportable segment produces electronic instrument clusters, electronic control units and driver information systems and includes the recently acquired Orlaco business which designs and manufactures camera-based vision systems, monitors and related products using its vision processing technology. The PST reportable segment designs and manufactures electronic vehicle security alarms, convenience accessories, vehicle tracking devices and monitoring services and in-vehicle audio and video devices.  The accounting policies of the Company's reportable segments are the same as those described in Note 2, “Summary of Significant Accounting Policies” of the Company's 2016 Form 10-K. The Company's management evaluates the performance of its reportable segments based primarily on revenues from external customers and operating income . Inter-segment sales are accounted for on terms similar to those to third parties and are eliminated upon consolidation.  The financial information presented below is for our three reportable operating segments and includes adjustments for unallocated corporate costs and intercompany eliminations, where applicable. Such costs and eliminations do not meet the requirements for being classified as an operating segment. Corporate costs include various support functions, such as information technology, corporate finance, legal, executive administration and human resources.   A summary of financial information by reportable segment is as follows:    Three months ended Nine months ended  September 30, September 30,  2017 2016 2017 2016  Net Sales:  Control Devices $ 106,842 $ 103,700 $ 339,716 $ 304,957  Inter-segment sales 1,118 430 3,269 1,448  Control Devices net sales 107,960 104,130 342,985 306,405   Electronics 71,354 47,804 206,769 158,201  Inter-segment sales 8,959 9,495 30,538 24,706  Electronics net sales 80,313 57,299 237,307 182,907   PST 25,386 22,342 70,519 60,207  Inter-segment sales 145 - 145 -  PST net sales 25,531 22,342 70,664 60,207   Eliminations (10,222) (9,925) (33,952) (26,154)  Total net sales $ 203,582 $ 173,846 $ 617,004 $ 523,365  Operating Income (Loss):  Control Devices $ 16,249 $ 15,319 $ 55,257 $ 47,133  Electronics 4,896 3,735 13,267 12,050  PST 1,018 29 2,720 (4,179)  Unallocated Corporate (A) (8,867) (7,303) (27,108) (21,092)  Total operating income $ 13,296 $ 11,780 $ 44,136 $ 33,912  Depreciation and Amortization:  Control Devices $ 2,664 $ 2,561 $ 8,050 $ 7,345  Electronics 2,136 996 5,947 3,076  PST 2,115 2,307 6,299 6,388  Unallocated Corporate 181 115 376 309  Total depreciation and amortization (B) $ 7,096 $ 5,979 $ 20,672 $ 17,118  Interest Expense, net:  Control Devices $ 19 $ 56 $ 84 $ 172  Electronics 24 33 68 196  PST 378 934 1,482 2,686  Unallocated Corporate 1,087 661 2,802 1,984  Total interest expense, net $ 1,508 $ 1,684 $ 4,436 $ 5,038  Capital Expenditures:  Control Devices $ 5,523 $ 3,229 $ 13,318 $ 9,260  Electronics 2,417 1,244 6,451 5,229  PST 974 640 2,899 2,516  Unallocated Corporate (C) 811 1,365 2,224 1,479  Total capital expenditures $ 9,725 $ 6,478 $ 24,892 $ 18,484          September 30, December 31,  2017 2016  Total Assets:  Control Devices $ 166,641 $ 150,623  Electronics 245,568 99,964  PST 108,162 107,405  Corporate (C) 356,396 287,031  Eliminations (336,498) (250,494)  Total assets $ 540,269 $ 394,529    (A) Unallocated Corporate expenses include, among other items, finance, legal, human resources and information technology costs and share-based compensation. (B) These amounts represent depreciation and amortization on property, plant and equipment and certain intangible assets. (C) Assets located at Corporate consist primarily of cash, intercompany loan receivables, fixed assets for the corporate headquarter building, equity investments and investments in subsidiaries.   The following tables present net sales and long-term assets for each of the geographic areas in which the Company operates:   Three months ended Nine months ended  September 30, September 30,  2017 2016 2017 2016  Net Sales:  North America $ 113,402 $ 108,605 $ 358,275 $ 321,973  South America 25,386 22,342 70,519 60,207  Europe and Other (D) 64,794 42,899 188,210 141,185  Total net sales $ 203,582 $ 173,846 $ 617,004 $ 523,365      September 30, December 31,  2017 2016   Long-term Assets:  North America $ 76,539 $ 73,835  South America 62,500 63,497  Europe and Other (D) 104,057 16,304  Total long-term assets $ 243,096 $ 153,636               (D) The amounts for 2017 include net sales and long-term assets related to Orlaco which is disclosed in Note 3.     

Investments

Investments	9 Months Ended
	Sep. 30, 2017
Investments [Abstract]
Investments	            (1 5 ) Investments Minda Stoneridge Instruments Ltd. The Company has a 49% interest in Minda Stoneridge Instruments Ltd. (“Minda”) , a company based in India that manufactures electronics, instrumentation equipment and sensors primarily for the motorcycle and commercial vehicle market s . The investment is accounted for under the equity method of accounting. The Company's investment in Minda , recorded as a component of investments and other long-term assets, net on the condensed consolidated balance sheets, was $9,475 and $7,952 at September 30, 2017 and December 31, 201 6 , respectively. Equity in earnings of Minda included in the condensed consolidated statements of operations was $465 and $307 , for the three months ended September 30, 2017 and 2016 , respectively. Equity in earnings of Minda included in the condensed consolidated statements of operations was $1,200 and $603 , for the nine months ended September 30, 2017 and 2016 , respectively.  PST Eletrônica Ltda. The Company had a 74% controlling interest in PST from December 31, 2011 through May 15, 2017 . On May 16, 2017, the Company acquired the 26% noncontrolling interest in PST for $1,500 in cash along with earn-out consideration. The Company will be required to pay additional earn-out consideration, which is not capped, based on PST’s financial performance in either 2020 or 2021. The preliminary estimated fair value of the earn-out consideration as of the acquisition date was $10,400, which was subsequently adjusted to $10,180 , and was based on discounted cash flows utilizing forecasted EBITDA in 2020 and 2021. This fair value meas urement is classified within L evel 3 of the fair value hierarchy . The transaction was accounted for as an equity transaction, and therefore no gain or loss was recognized in the statement of operations or comprehensive income. The noncontrolling interest balance on the May 16, 2017 acquisition date was $14,458 , of which $31,453 and ($16,995) was related to the carrying value of the investment and foreign currency translation, respectively, and accordingly these amounts were reclassified to additional paid-in capital and accumulated other comprehensive loss, respectively.  The following table sets forth a summary of the change in noncontrolling interest:     Three months ended Nine months ended  September 30, September 30,  2017 2016 2017 2016  Noncontrolling interest at beginning of period $ - $ 14,171 $ 13,762 $ 13,310  Net loss - (303) (130) (2,009)  Foreign currency translation - (164) 826 2,403  Comprehensive income (loss) - (467) 696 394  Acquisition of noncontrolling interest - - (14,458) -  Noncontrolling interest at end of period $ - $ 13,704 $ - $ 13,704  PST has dividends payable to former noncontrolling interest holders of $22,143 Brazilian real ( $7,004 ) at September 30, 2017, which includes the dividend declared on May 1 6, 2017 of $9,610 Brazilian real ( $3,0 92 ) and $1,691 Brazilian real ( $535 ) in monetary correction. The dividend is payable on or before January 1, 2020, and is subject to monetary correction based on the Brazilian consumer price inflation index. The dividend payable related to PST is recorded within other long-term liabilities on the condensed consolidated balance sheet.

Acquisition of Orlaco (Tables)

Acquisition of Orlaco (Tables)	9 Months Ended
	Sep. 30, 2017
Acquisition of Orlaco [Abstract]
Schedule of Total Consideration Transferred	The acquisition date fair value of the total consideration transferred consisted of the following:     Cash $ 79,675  Fair value of earn-out consideration and other adjustments 4,208  Total purchase price $ 83,883 
Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed	The following table summarizes the estimated fair value of the assets acquired and liabilities assumed at the acquisition date (including measurement period adjustments). The purchase price and associated allocation is preliminary pending completion of the valuation of acquired inventory, property, plant and equipment, intangible assets and deferred income taxes and may be subsequently adjusted to reflect final valuation results and purchase price adjustments. Based upon information obtained, certain of the fair value amounts previously estimated were adjusted during the measurement period. These measurement period adjustments related to updated valuation reports and appraisals received from our external valuation specialists, as well as revisions to internal estimates. The changes in estimates recorded at September 30, 2017 include an increase in inventory of $265 ; an increase in intangible assets of $113 ; a decrease in other long-term assets of $684 ; an increase in other current liabilities of $29 ; a decrease in accounts receivable of $201 and a decrease in earn-out consideration of $1,007 . The measurement period and working capital adjustments resulted in a decrease to goodwill of $727 .    At January 31, 2017  Cash $ 2,165  Accounts receivable 7,929  Inventory 9,409  Prepaid and other current assets 298  Property, plant and equipment 6,668  Identifiable intangible assets 38,739  Other long-term assets 6  Total identifiable assets acquired 65,214   Accounts payable 3,020  Other current liabilities 834  Deferred tax liabilities 9,994  Warranty liability 1,462  Total liabilities assumed 15,310  Net identifiable assets acquired 49,904  Goodwill 33,979  Net assets acquired $ 83,883 
Pro Forma Results of Operations	The following unaudited pro forma information reflects the Company’s condensed consolidated results of operations as if the acquisition had taken place on January 1, 2016. The unaudited pro forma information is not necessarily indicative of the results of operations that the Company would have reported had the transaction actually occurred at the beginning of these periods, nor is it necessarily indicative of future results.     Three months ended Nine months ended  September 30, September 30,  2017 2016 2017 2016   Net sales $ 203,582 $ 187,626 $ 622,034 $ 566,518  Net income attributable to Stoneridge, Inc. and subsidiaries $ 8,049 $ 11,406 $ 26,375 $ 33,195 

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 30, 2017
Inventories [Abstract]
Schedule of Inventory, Current	Inventory cost includes material, labor and overhead. Inventories consisted of the following:    September 30, December 31,  2017 2016  Raw materials $ 47,840 $ 35,665  Work-in-progress 8,249 7,483  Finished goods 22,554 16,969  Total inventories, net $ 78,643 $ 60,117 

Goodwill and Intangibles (Table

Goodwill and Intangibles (Tables)	9 Months Ended
	Sep. 30, 2017
Goodwill and Intangibles [Abstract]
Schedule of Intangibles	Intangibles    Acquisition Accumulated  As of September 30, 2017 cost amortization Net  Customer lists $ 58,470 $ (12,196) $ 46,274  Tradenames 24,305 (5,592) 18,713  Technology 17,849 (4,825) 13,024  Other 42 (42) -  Total $ 100,666 $ (22,655) $ 78,011     Acquisition Accumulated  As of December 31, 2016 cost amortization Net  Customer lists $ 27,476 $ (9,138) $ 18,338  Tradenames 18,116 (4,558) 13,558  Technology 10,862 (3,498) 7,364  Other 41 (41) -  Total $ 56,495 $ (17,235) $ 39,260 

Financial Instruments and Fai26

Financial Instruments and Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2017
Financial Instruments and Fair Value Measurements [Abstract]
Notional Amounts and Fair Values of Derivative Instruments in the Consolidated Balance	The notional amounts and fair values of derivative instruments in the condensed consolidated balance sheets were as follows:     Prepaid expenses Accrued expenses and  Notional amounts (A) and other current assets other current liabilities  September 30, December 31, September 30, December 31, September 30, December 31,  2017 2016 2017 2016 2017 2016  Derivatives designated as hedging instruments:  Cash flow hedges:  Forward currency contracts $ 1,399 $ 5,699 $ 237 $ - $ - $ 28  Derivatives not designated as hedging instruments:  Forward currency contracts $ 1,187 $ 1,601 $ - $ - $ 37 $ 3    (A) Notional amounts represent the gross contract of the derivatives outstanding in U.S. dollars. 
Amounts Recorded for the Cash Flow Hedges in Other Comprehensive Income (Loss) in Shareholders' Equity and in Net Income	 Gross amounts recorded for the cash flow hedges in other comprehensive income (loss) and in net income for the three months ended September 30 are as follows:     Gain (loss) reclassified from  Gain (loss) recorded in other other comprehensive income  comprehensive income (loss) (loss) into net income (A)  2017 2016 2017 2016  Derivatives designated as cash flow hedges:  Forward currency contracts $ 56 $ (129) $ 268 $ (65)   Gross amounts recorded for the cash flow hedges in other comprehensive income (loss) and in net income for the nine months ended September 30 are as follows:     Gain (loss) reclassified from  Gain (loss) recorded in other other comprehensive income  comprehensive income (loss) (loss) into net income (A)  2017 2016 2017 2016  Derivatives designated as cash flow hedges:  Forward currency contracts $ 717 $ (656) $ 452 $ (183)  
Schedule of Assets and Liabilities that are Measured at Fair Value on a Recurring Basis	The following table presents our assets and liabilities that are measured at fair value on a recurring basis and are categorized using the three levels of the fair value hierarchy based on the reliability of inputs used.  
Summary of the Change in Fair Value of the Level 3 Financial Liabilities Related to Contingent Consideration	  September 30, 2017 December 31, 2016  Fair values estimated using  Level 1 Level 2 Level 3  Fair value inputs inputs inputs Fair value  Financial assets carried at fair value:  Forward currency contracts $ 237 $ - $ 237 $ - $ -  Total financial assets carried at fair value $ 237 $ - $ 237 $ - $ -   Financial liabilities carried at fair value:  Forward currency contracts $ 37 $ - $ 37 $ - $ 31  Earn-out consideration 18,295 - - 18,295 -  Total financial liabilities carried at fair value $ 18,332 $ - $ 37 $ 18,295 $ 31  The following table sets forth a summary of the change in fair value of the Company’s Level 3 financial liabilities related to earn-out consideration that are measured at fair value on a recurring basis.     Orlaco PST Total  Balance at December 31, 2016 $ - $ - $ -  Fair value on acquisition date 3,243 10,180 13,423  Change in fair value 3,926 719 4,645  Foreign currency adjustments 408 (181) 227  Balance at September 30, 2017 $ 7,577 $ 10,718 $ 18,295  

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 30, 2017
Debt [Abstract]
Schedule of Debt	Debt consisted of the following at September 30, 2017 and December 31, 2016:    September 30, December 31, Interest rates at  2017 2016 September 30, 2017 Maturity  Revolving Credit Facility  Credit Facility $ 126,000 $ 67,000 2.49% September 2021   Debt  PST short-term obligations - 5,097  PST long-term notes 9,475 11,452 10.0% - 13.4% 2019 -2021  Other 48 137  Total debt 9,523 16,686  Less: current portion (4,421) (8,626)  Total long-term debt, net $ 5,102 $ 8,060  

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Schedule of Weighted-Average Number of Shares	Weighted-average Common Shares outstanding used in calculating basic and diluted earnings per share were as follows:    Three months ended Nine months ended  September 30, September 30,  2017 2016 2017 2016  Basic weighted-average Common Shares outstanding 28,135,705 27,792,469 28,062,438 27,753,015  Effect of dilutive shares 516,637 566,808 550,188 513,074  Diluted weighted-average Common Shares outstanding 28,652,342 28,359,277 28,612,626 28,266,089 

Changes in Accumulated Other 29

Changes in Accumulated Other Comprehensive Loss by Component (Tables)	9 Months Ended
	Sep. 30, 2017
Changes in Accumulated Other Comprehensive Loss by Component [Abstract]
Changes in Accumulated Other Comprehensive Loss by Component	Changes in accumulated other comprehensive loss for the three months ended September 30 , 2017 and 2016 were as follows:    Foreign Unrealized Benefit  currency gain (loss) plan  translation on derivatives adjustment Total  Balance at July 1, 2017 $ (75,551) $ 292 $ - $ (75,259)   Other comprehensive income before reclassifications 6,483 36 - 6,519  Amounts reclassified from accumulated other  comprehensive loss - (174) - (174)  Net other comprehensive income (loss), net of tax 6,483 (138) - 6,345  Balance at September 30, 2017 $ (69,068) $ 154 $ - $ (68,914)   Balance at July 1, 2016 $ (63,735) $ (19) $ 84 $ (63,670)   Other comprehensive loss before reclassifications (638) (129) - (767)  Amounts reclassified from accumulated other  comprehensive loss - 65 (84) (19)  Net other comprehensive loss, net of tax (638) (64) (84) (786)   Balance at September 30, 2016 $ (64,373) $ (83) $ - $ (64,456)               Changes in accumulated other comprehensive loss for the nine months ended September 30 , 2017 and 2016 were as follows:     Foreign Unrealized Benefit  currency gain (loss) plan  translation on derivatives adjustment Total  Balance at January 1, 2017 $ (67,895) $ (18) $ - $ (67,913)   Other comprehensive income before reclassifications 15,822 466 - 16,288  Amounts reclassified from accumulated other  comprehensive loss - (294) - (294)  Net other comprehensive income, net of tax 15,822 172 - 15,994  Reclassification of foreign currency translation associated  with noncontrolling interest acquired (16,995) - - -  Balance at September 30, 2017 $ (69,068) $ 154 $ - $ (68,914)   Balance at January 1, 2016 $ (70,296) $ 390 $ 84 $ (69,822)   Other comprehensive income (loss) before reclassifications 5,923 (656) - 5,267  Amounts reclassified from accumulated other  comprehensive loss - 183 (84) 99  Net other comprehensive income (loss), net of tax 5,923 (473) (84) 5,366   Balance at September 30, 2016 $ (64,373) $ (83) $ - $ (64,456) 

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies [Abstract]
Schedule of Product Warranty and Recall Liability	 The following provides a reconciliation of changes in product warranty and recall liability:    Nine months ended September 30 2017 2016  Product warranty and recall at beginning of period $ 9,344 $ 6,419  Accruals for products shipped during period 6,408 3,010  Assumed warranty liability related to Orlaco 1,462 -  Aggregate changes in pre-existing liabilities due to claim developments 1,616 (272)  Settlements made during the period (9,062) (1,332)  Product warranty and recall at end of period $ 9,768 $ 7,825 

Business Realignment and Corp31

Business Realignment and Corporate Headquarter Relocation (Tables)	9 Months Ended
	Sep. 30, 2017
Business Realignment and Corporate Headquarter Relocation [Abstract]
Schedule of Restructuring and Related Costs	Business realignment charges by reportable segment were as follows:     Three months ended Nine months ended  September 30, September 30,  2017 2016 2017 2016  Electronics (A) $ 16 $ - $ 72 $ 1,180  PST (B) 37 211 475 1,242  Total business realignment charges $ 53 $ 211 $ 547 $ 2,422  (A) Severance costs for the three and nine months ended September 30 , 2017 related to SG&A were $16 . Severan ce costs for the nine months ended September 30, 2017 related to COGS were $56 . Severance costs for the nine months ended September 30, 2016 related to SG&A and design and development (“D&D”) were $196 and $984 , respectively.  (B) Severance costs for the three months ended September 30 , 2017 related to COGS, SG&A and D&D were $17 , $19 and $1 , respectively. Severance costs for the three months ended September 30, 2016 related to COGS and SG&A were $20 and $191 , respectively. Severance costs for the nine months ended September 30 , 2017 related t o COGS, SG&A and D&D were $355, $119 and $1 , respectively. Severance costs for the nine months ended September 30, 2016 related to COGS, SG&A and D&D were $307 , $819 and $116 , respectively. 
Schedule of Business Realignment Charges Classified by Statement of Operations	Business realignment charges classified by statement of operations line item were as follows:     Three months ended Nine months ended  September 30, September 30,  2017 2016 2017 2016  Cost of goods sold $ 17 $ 20 $ 411 $ 307  Selling, general and administrative 35 191 135 1,015  Design and development 1 - 1 1,100  Total business realignment charges $ 53 $ 211 $ 547 $ 2,422 

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	A summary of financial information by reportable segment is as follows:    Three months ended Nine months ended  September 30, September 30,  2017 2016 2017 2016  Net Sales:  Control Devices $ 106,842 $ 103,700 $ 339,716 $ 304,957  Inter-segment sales 1,118 430 3,269 1,448  Control Devices net sales 107,960 104,130 342,985 306,405   Electronics 71,354 47,804 206,769 158,201  Inter-segment sales 8,959 9,495 30,538 24,706  Electronics net sales 80,313 57,299 237,307 182,907   PST 25,386 22,342 70,519 60,207  Inter-segment sales 145 - 145 -  PST net sales 25,531 22,342 70,664 60,207   Eliminations (10,222) (9,925) (33,952) (26,154)  Total net sales $ 203,582 $ 173,846 $ 617,004 $ 523,365  Operating Income (Loss):  Control Devices $ 16,249 $ 15,319 $ 55,257 $ 47,133  Electronics 4,896 3,735 13,267 12,050  PST 1,018 29 2,720 (4,179)  Unallocated Corporate (A) (8,867) (7,303) (27,108) (21,092)  Total operating income $ 13,296 $ 11,780 $ 44,136 $ 33,912  Depreciation and Amortization:  Control Devices $ 2,664 $ 2,561 $ 8,050 $ 7,345  Electronics 2,136 996 5,947 3,076  PST 2,115 2,307 6,299 6,388  Unallocated Corporate 181 115 376 309  Total depreciation and amortization (B) $ 7,096 $ 5,979 $ 20,672 $ 17,118  Interest Expense, net:  Control Devices $ 19 $ 56 $ 84 $ 172  Electronics 24 33 68 196  PST 378 934 1,482 2,686  Unallocated Corporate 1,087 661 2,802 1,984  Total interest expense, net $ 1,508 $ 1,684 $ 4,436 $ 5,038  Capital Expenditures:  Control Devices $ 5,523 $ 3,229 $ 13,318 $ 9,260  Electronics 2,417 1,244 6,451 5,229  PST 974 640 2,899 2,516  Unallocated Corporate (C) 811 1,365 2,224 1,479  Total capital expenditures $ 9,725 $ 6,478 $ 24,892 $ 18,484          September 30, December 31,  2017 2016  Total Assets:  Control Devices $ 166,641 $ 150,623  Electronics 245,568 99,964  PST 108,162 107,405  Corporate (C) 356,396 287,031  Eliminations (336,498) (250,494)  Total assets $ 540,269 $ 394,529    (A) Unallocated Corporate expenses include, among other items, finance, legal, human resources and information technology costs and share-based compensation. (B) These amounts represent depreciation and amortization on property, plant and equipment and certain intangible assets. (C) Assets located at Corporate consist primarily of cash, intercompany loan receivables, fixed assets for the corporate headquarter building, equity investments and investments in subsidiaries.
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas	The following tables present net sales and long-term assets for each of the geographic areas in which the Company operates:   Three months ended Nine months ended  September 30, September 30,  2017 2016 2017 2016  Net Sales:  North America $ 113,402 $ 108,605 $ 358,275 $ 321,973  South America 25,386 22,342 70,519 60,207  Europe and Other (D) 64,794 42,899 188,210 141,185  Total net sales $ 203,582 $ 173,846 $ 617,004 $ 523,365      September 30, December 31,  2017 2016   Long-term Assets:  North America $ 76,539 $ 73,835  South America 62,500 63,497  Europe and Other (D) 104,057 16,304  Total long-term assets $ 243,096 $ 153,636 

Investments (Tables)

Investments (Tables)	9 Months Ended
	Sep. 30, 2017
Investments [Abstract]
Schedule of Noncontrolling Interest	  Three months ended Nine months ended  September 30, September 30,  2017 2016 2017 2016  Noncontrolling interest at beginning of period $ - $ 14,171 $ 13,762 $ 13,310  Net loss - (303) (130) (2,009)  Foreign currency translation - (164) 826 2,403  Comprehensive income (loss) - (467) 696 394  Acquisition of noncontrolling interest - - (14,458) -  Noncontrolling interest at end of period $ - $ 13,704 $ - $ 13,704  

Basis of Presentation (Narrativ

Basis of Presentation (Narrative) (Details) - PST Eletronicaltda [Member]	64 Months Ended	65 Months Ended
	May 15, 2017	May 15, 2017	May 16, 2017
Schedule of Equity Method Investments [Line Items]
Percentage ownership in consolidated subsidiary	74.00%	74.00%
Percentage of additional noncontrolling interest acquired			26.00%

Recently Issued Accounting St35

Recently Issued Accounting Standards (Narrative) (Details) $ in Thousands	Dec. 31, 2016USD ($)
Recently Issued Accounting Standards [Abstract]
Cumulative effect of the accounting change for unrecognzized tax benefits	$ 1,729

Acquisition of Orlaco (Narrativ

Acquisition of Orlaco (Narrative) (Details) - Orlaco [Member] € in Thousands, $ in Thousands	1 Months Ended		3 Months Ended	9 Months Ended
	Jan. 31, 2017EUR (€)	Jan. 31, 2017USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2017USD ($)	Jan. 31, 2017USD ($)
Business Acquisition [Line Items]
Acquisition agreement date				Jan. 31, 2017
Total cash paid at closing	€ 74,939	$ 79,675
Cash paid to seller at closing	67,439				$ 71,701
Aquisition payment held in escrow to secure payment for working capital and other adustments	7,500				7,974
Increase in inventory				$ 265
Increase in intangible assets				113
Increase (decrease) in accounts receivable				(201)
Increase in other current liabilities				29
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Long Term Assets				(684)
Increase (decrease) in earn-out consideration				(1,007)
Intangible assets aquired					38,739
Deferred tax liabilities acquired					9,994
Increase (decrease) in goodwill				(727)
Acquisition related costs				1,259
Post-acquisition sales			$ 18,502	46,956
Post-acquisition net income (loss)			1,254	1,299
Expense related to fair value adjustment for earn-out consideration			1,823	3,926
Earnout Consideration [Member]
Business Acquisition [Line Items]
Maximum additional earnout consideration | €	€ 7,500
Fair Value Adjustment to Inventory [Member]
Business Acquisition [Line Items]
Expense related to inventory fair value step up			$ 0	$ 1,636
Customer Lists [Member]
Business Acquisition [Line Items]
Intangible assets aquired					27,518
Intangible asset useful life	15 years	15 years
Trademarks [Member]
Business Acquisition [Line Items]
Intangible assets aquired					5,142
Intangible asset useful life	20 years	20 years
Technology [Member]
Business Acquisition [Line Items]
Intangible assets aquired					$ 6,079
Intangible asset useful life	7 years	7 years

Acquisition of Orlaco (Schedule

Acquisition of Orlaco (Schedule of Total Consideration Transferred) (Details) - 1 months ended Jan. 31, 2017 - Orlaco [Member] € in Thousands, $ in Thousands	EUR (€)	USD ($)
Business Acquisition [Line Items]
Cash paid at closing	€ 74,939	$ 79,675
Fair value of earn-out liability and other adjustments		4,208
Total fair value		$ 83,883

Acquisition of Orlaco (Schedu38

Acquisition of Orlaco (Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Jan. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill	$ 38,224		$ 931
Orlaco [Member]
Business Acquisition [Line Items]
Cash		$ 2,165
Accounts receivable		7,929
Inventory		9,409
Prepaids and other current assets		298
Property, plant and equipment		6,668
Identifiable intangible assets		38,739
Other long-term assets		6
Total identifiable assets acquired		65,214
Accounts payable		3,020
Other current liabilities		834
Deferred tax liabilities		9,994
Warranty liabilitity		1,462
Total liabilities assumed		15,310
Net identifiable assets acquired		49,904
Goodwill		33,979
Net assets acquired		$ 83,883

Acquisition of Orlaco (Pro Form

Acquisition of Orlaco (Pro Forma Results of Operations) (Details) - Orlaco [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Business Acquisition [Line Items]
Net sales	$ 203,582	$ 187,626	$ 622,034	$ 566,518
Net income attributable to Stoneridge, Inc. and subsidiaries	$ 8,049	$ 11,406	$ 26,375	$ 33,195

Inventories (Narrative) (Detail

Inventories (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Inventories [Abstract]
Inventory amount, FIFO	$ 56,861	$ 37,765
Inventory amount, weighted average cost	$ 21,782	$ 22,352

Inventories (Schedule of Invent

Inventories (Schedule of Inventories) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Inventories [Abstract]
Raw materials	$ 47,840	$ 35,665
Work-in-progress	8,249	7,483
Finished goods	22,554	16,969
Total inventories, net	$ 78,643	$ 60,117

Goodwill and Intangibles (Narra

Goodwill and Intangibles (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Goodwill	$ 38,224		$ 38,224		$ 931
Amortization expense	1,711	$ 869	4,750	$ 2,402
Amortization expense 2017	6,500		6,500
Amortization expense 2018	6,800		6,800
Amortization expense 2019	6,800		6,800
Amortization expense 2020	6,800		6,800
Amortization expense 2021	6,800		6,800
Electronics [Member]
Goodwill	$ 38,224		$ 38,224		$ 931

Goodwill and Intangibles (Sched

Goodwill and Intangibles (Schedule of Intangibles) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Acquisition cost	$ 100,666	$ 56,495
Accumulated amortization	(22,655)	(17,235)
Net	78,011	39,260
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition cost	58,470	27,476
Accumulated amortization	(12,196)	(9,138)
Net	46,274	18,338
Tradenames [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition cost	24,305	18,116
Accumulated amortization	(5,592)	(4,558)
Net	18,713	13,558
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition cost	17,849	10,862
Accumulated amortization	(4,825)	(3,498)
Net	13,024	7,364
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition cost	42	41
Accumulated amortization	(42)	(41)
Net	$ 0	$ 0

Financial Instruments and Fai44

Financial Instruments and Fair Value Measurements (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2017		Sep. 30, 2016	Sep. 30, 2017		Sep. 30, 2016	Dec. 31, 2016
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Forward currency asset contracts	$ 237			$ 237
Forward currency liabilities contracts	37			37			$ 31
Earn-out liability	18,295			18,295
Transfers in or out of Level 3				0
Euro-Denominated Foreign Currency Forward Contracts [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Gain (loss) on derivative instruments held for trading purposes, net	(36)		$ 1	(164)		$ (38)
Cash Flow Hedging [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
(Gain) loss from cash flow hedge derivatives to be reclassified	(237)			(237)
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Forward Currency Contracts [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Notional amounts	1,399	[1]		1,399	[1]		5,699
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Mexican Peso-Denominated Foreign Currency Forward Contracts [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Notional amounts	1,399			1,399			5,699
Not Designated as Hedging Instrument [Member] | Forward Currency Contracts [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Notional amounts	1,187	[1]		1,187	[1]		1,601
Not Designated as Hedging Instrument [Member] | Euro-Denominated Foreign Currency Forward Contracts [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Notional amounts	$ 1,187			$ 1,187			$ 1,601
[1]	Notional amounts represent the gross contract of the derivatives outstanding in U.S. dollars.

Financial Instruments and Fai45

Financial Instruments and Fair Value Measurements (Schedule of Derivative Instruments in Statement of Financial Position, Fair Value) (Details) - Forward Currency Contracts [Member] - USD ($) $ in Thousands	Sep. 30, 2017		Dec. 31, 2016
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional amounts	$ 1,187	[1]	$ 1,601
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional amounts	1,399	[1]	5,699
Other Assets [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Fair value of other derivatives	0		0
Other Assets [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Cash flow hedges , other derivatives	237		0
Other Liabilities [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Fair value of other derivatives	(37)		(3)
Other Liabilities [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Cash flow hedges , other derivatives	$ 0		$ (28)
[1]	Notional amounts represent the gross contract of the derivatives outstanding in U.S. dollars.

Financial Instruments and Fai46

Financial Instruments and Fair Value Measurements (Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss)) (Details) - Designated as Hedging Instrument [Member] - Forward Currency Contracts [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Derivatives designated as cash flow hedges:
Gain (loss) recorded in other comprehensive income	$ 56	$ (129)	$ 717	$ (656)
Gain (loss) reclassified from other comprehensive income into net income	$ 268	$ (65)	$ 452	$ (183)

Financial Instruments and Fai47

Financial Instruments and Fair Value Measurements (Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financial assets carried at fair value:
Forward currency asset contracts	$ 237
Total financial assets carried at fair value	237
Financial liabilities carried at fair value:
Forward currency liabilities contracts	37	$ 31
Earn-out consideration	18,295
Total financial liabilities carried at fair value	18,332	$ 31
Fair Value, Inputs, Level 2 [Member]
Financial assets carried at fair value:
Forward currency asset contracts	237
Total financial assets carried at fair value	237
Financial liabilities carried at fair value:
Forward currency liabilities contracts	37
Total financial liabilities carried at fair value	37
Fair Value, Inputs, Level 3 [Member]
Financial liabilities carried at fair value:
Earn-out consideration	18,295
Total financial liabilities carried at fair value	$ 18,295

Financial Instruments and Fai48

Financial Instruments and Fair Value Measuements (Summary of the Change in Fair Value of the Level 3 Financial Liabilities Related to Contingent Consideration) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial liability, Beginning balance	$ 0
Fair value on acquisition date	13,423
Change in fair value	4,645
Foreign currency adjustments	227
Financial liability, Ending balance	18,295
Orlaco [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial liability, Beginning balance	0
Fair value on acquisition date	3,243
Change in fair value	3,926
Foreign currency adjustments	408
Financial liability, Ending balance	7,577
PST Eletronicaltda [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial liability, Beginning balance	0
Fair value on acquisition date	10,180
Change in fair value	719
Foreign currency adjustments	(181)
Financial liability, Ending balance	$ 10,718

Share-Based Compensation (Narra

Share-Based Compensation (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Selling, General and Administrative Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 1,648	$ 1,699	$ 5,713	$ 4,587

Debt (Narrative) (Details)

Debt (Narrative) (Details) SEK in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)	Sep. 30, 2017SEK	Sep. 30, 2017USD ($)	Jan. 30, 2017USD ($)	Dec. 31, 2016SEK	Dec. 31, 2016USD ($)	Aug. 12, 2016USD ($)	Sep. 12, 2014USD ($)	Oct. 04, 2010	Nov. 02, 2007USD ($)
Debt Instrument [Line Items]
Borrowings outstanding			$ 126,000			$ 67,000
Senior Notes [Member]
Debt Instrument [Line Items]
Debt interest rate									9.50%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Capitalized deferred financing costs							$ 339
Line of credit facility, maximum borrowing capacity								$ 300,000		$ 100,000
Increase in maximum borrowing capacity of credit facility								$ 80,000
Borrowings outstanding			$ 126,000			67,000
Line of credit expiration date	Sep. 12, 2019
Maximum leverage ratio		300.00%	300.00%
Minimum interest coverage ratio		350.00%	350.00%
Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Credit facility, commitment fee percentage	0.35%
Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Credit facility, commitment fee percentage	0.20%
Asset-Based Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity										$ 100,000
Letter of Credit [Member]
Debt Instrument [Line Items]
Outstanding letters of credit			$ 3,367			3,399
Credit Facility [Member]
Debt Instrument [Line Items]
Credit Facility covenant compliance	The Company was in compliance with all Credit Facility covenants at September 30, 2017 and December 31, 2016
Amendment Three [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facilty amendement date	Aug. 12, 2016
Length of the amended extension to the expiration date on debt	2 years
Line of credit expiration date	Sep. 12, 2021
Amendment Four [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Capitalized deferred financing costs				$ 61
PST Debt [Member]
Debt Instrument [Line Items]
Notes covenant compliance	PST was in compliance with all debt covenants at September 30, 2017 and December 31, 2016.
PST Eletronicaltda [Member]
Debt Instrument [Line Items]
Long-term debt, weighted average interest rate		11.70%	11.70%
PST Eletronicaltda [Member] | Term Loan [Member]
Debt Instrument [Line Items]
October 2017 through September 2018			$ 4,373
October 2018 to December 2018			1,211
2,019			2,685
2,020			629
2,021			$ 577
Long-term debt, weighted average interest rate		11.70%	11.70%
Borrowing Sub-Limit for the Company's Foreign Subsidiaries [Member] | Amendment Three [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Sub-limit for foreign subsidiary borrowings			$ 80,000
Increase in sub-limit for foreign subsidiary borrowings			30,000
Permitted Loans and Investments in Foreign Subsidiaries [Member] | Amendment Three [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Increase in permitted loans and investments in foregin subsidiaries.	$ 5,000
Amount of permitted loans and investments in foregin subsidiaries			30,000
Electronics [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		SEK 20,000	2,455		SEK 20,000	2,196
Borrowings outstanding			$ 0			$ 0

Debt (Schedule of Debt) (Detail

Debt (Schedule of Debt) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Revolving credit facility	$ 126,000	$ 67,000
Debt:
Total debt	9,523	16,686
Less: current portion	(4,421)	(8,626)
Total long-term debt, net	5,102	8,060
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility	$ 126,000	67,000
Debt:
Debt, maturity	September 2,021
Minimum [Member] | Revolving Credit Facility [Member]
Debt:
Interest rate	2.49%
PST Short-Term Notes [Member]
Debt Instrument [Line Items]
Short-term debt [Member]	$ 0	5,097
PST Long-Term Notes [Member]
Debt:
Total long-term debt, net	$ 9,475	11,452
Debt maturity period range start	2,019
Debt maturity period range end	2,021
PST Long-Term Notes [Member] | Maximum [Member]
Debt:
Interest rate	13.40%
PST Long-Term Notes [Member] | Minimum [Member]
Debt:
Interest rate	10.00%
Other [Member]
Debt:
Total debt	$ 48	$ 137

Earnings Per Share (Narative) (

Earnings Per Share (Narative) (Details) - shares	Sep. 30, 2017	Sep. 30, 2016
Performance Based Restricted Common Shares [Member]
Performance based restricted common shares outstanding	0	0
Performance Based Right to Receive Common Shares [Member]
Common shares, non-vested	781,977	843,140

Earnings Per Share (Weighted Av

Earnings Per Share (Weighted Average Shares Oustanding Used in Calculating Basic and Diluted Net Income Per Share) (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Basic weighted-average common shares outstanding	28,135,705	27,792,469	28,062,438	27,753,015
Effect of dilutive shares	516,637	566,808	550,188	513,074
Diluted weighted-average common shares outstanding	28,652,342	28,359,277	28,612,626	28,266,089

Changes in Accumulated Other 54

Changes in Accumulated Other Comprehensive Loss by Component (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Changes in Accumulated Other Comprehensive Loss by Component [Abstract]
Foreign currency translation, Beginning balance		$ (75,551)	$ (63,735)	$ (67,895)	$ (70,296)
Foreign currency translation, Other comprehensive income (loss) before reclassifications		6,483	(638)	15,822	5,923
Foreign currency translation, Amounts reclassified from accumulated other comprehensive loss
Foreign currency translation, Net other comprehensive income (loss), net of tax		6,483	(638)	15,822	5,923
Foreign currency translation, Reclassification of foreign currency translation associated with noncontrolling interest acquired				(16,995)
Foreign currency translation, Ending balance		(69,068)	(64,373)	(69,068)	(64,373)
Unrealized gain (loss) on hedging activities, Beginning balance		292	(19)	(18)	390
Unrealized gain (loss) on hedging activities, Other comprehensive income (loss) before reclassifications		36	(129)	466	(656)
Unrealized gain (loss) on hedging activities, Amounts reclassified from accumulated other comprehensive loss		(174)	65	(294)	183
Unrealized gain (loss) on hedging activities, Net other comprehensive income (loss), net of tax	[1]	(138)	(64)	172	(473)
Unrealized gain (loss) on hedging activities, Ending balance		154	(83)	154	(83)
Benefit plan liability, Beginning balance			84		84
Benefit plan liability, Other comprehensive loss before reclassifications
Benefit plan liability, Amounts reclassified from accumulated other comprehensive loss			(84)		(84)
Benefit plan liability, Net other comprehensive income (loss), net of tax			(84)		(84)
Benefit plan liability, Ending balance
Total, Other comprehensive income (loss) before reclassifications		6,519	(767)	16,288	5,267
Total, Amounts reclassified from accumulated other comprehensive loss		(174)	(19)	(294)	99
Net other comprehensive income (loss), net of tax		6,345	(786)	15,994	5,366
Accumulated other comprehensive income (loss), net of tax, total		$ (68,914)	$ (64,456)	$ (68,914)	$ (64,456)	$ (75,259)	$ (67,913)	$ (63,670)	$ (69,822)
[1]	Net of tax benefit of $(74) and $0 for the three months ended September 30, 2017 and 2016, respectively. Net of tax expense of $93 and $0 for the nine months ended September 30, 2017 and 2016, respectively.

Commitments and Contingencies55

Commitments and Contingencies (Narrative) (Details) BRL in Thousands, $ in Thousands, item in Millions	Oct. 02, 2017USD ($)	Sep. 30, 2017USD ($)item	Dec. 31, 2010	Sep. 30, 2017BRL	Sep. 30, 2017USD ($)	Dec. 31, 2016BRL	Dec. 31, 2016USD ($)
Short-term Debt [Line Items]
Environmental remediation accrued undiscounted liability					$ 267		$ 446
Number of vehicles the plaintiff states are effected | item		1
Product warranty and recall accrual					3,481		2,617
Verde v. Stoneridge, Inc. Member
Short-term Debt [Line Items]
Litigation settlement amount	$ 3
Royal v. Stoneridge, Inc. [Member]
Short-term Debt [Line Items]
Litigation liability					525
Royal v. Stoneridge, Inc, Attorney's Fees [Member]
Short-term Debt [Line Items]
Loss contingency, estimate of possible loss					375
Accrued Expenses and Other Current Liabilities [Member]
Short-term Debt [Line Items]
Environmental remediation accrued undiscounted liability					218		370
Letter of Credit [Member]
Short-term Debt [Line Items]
Line of credit					2,000
PST Eletronicaltda [Member]
Short-term Debt [Line Items]
Loss contingencies aggregate tax assessment not accrued				BRL 99,100	31,300
Percentage of state value added tax			25.00%
PST Eletronicaltda [Member] | Civil, labor and other tax contingencies [Member]
Short-term Debt [Line Items]
Loss contingency, estimate of possible loss				34,900	11,000	BRL 31,800	$ 9,800
PST Eletronicaltda [Member] | Value Added Tax [Member]
Short-term Debt [Line Items]
Loss contingencies aggregate tax assessment not accrued				13,200	4,200
PST Eletronicaltda [Member] | Interest On Tax [Member]
Short-term Debt [Line Items]
Loss contingencies aggregate tax assessment not accrued				74,500	23,500
PST Eletronicaltda [Member] | Penalties On Tax [Member]
Short-term Debt [Line Items]
Loss contingencies aggregate tax assessment not accrued				BRL 11,400	$ 3,600
Maximum [Member] | Royal v. Stoneridge, Inc. [Member]
Short-term Debt [Line Items]
Maximum loss per plaintiff		$ 5
Litigation Settlement, Maximum Awarded to All Plainfiffs		$ 15

Commitments and Contingencies56

Commitments and Contingencies (Reconciliation of Changes in Product Warranty and Recall Liability) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Commitments and Contingencies [Abstract]
Product warranty and recall at beginning of period	$ 9,344	$ 6,419
Accruals for products shipped during period	6,408	3,010
Acquired warranty liability related to acquisition	1,462
Aggregate changes in pre-existing liabilities due to claim developments	1,616	(272)
Settlements made during the period	(9,062)	(1,332)
Product warranty and recall at end of period	$ 9,768	$ 7,825

Business Realignment and Corp57

Business Realignment and Corporate Headquarter Relocation (Narrative) (Details) - Corporate Headquarter Relocation [Member] - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Apr. 25, 2016
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Headquarter relocation costs	$ 726		$ 998
Grant income		$ 338
Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Grant awarded				$ 1,400

Business Realignment and Corp58

Business Realignment and Corporate Headquarter Relocation (Schedule of Restructuring and Related Costs) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Restructuring Cost and Reserve [Line Items]
Total business realignment charges		$ 53	$ 211	$ 547	$ 2,422
Cost of Goods Sold [Member]
Restructuring Cost and Reserve [Line Items]
Total business realignment charges		17	20
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Total business realignment charges		35	191
Design and Development [Member]
Restructuring Cost and Reserve [Line Items]
Total business realignment charges		1
Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Total business realignment charges	[1]	16		72	1,180
Electronics [Member] | Cost of Goods Sold [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs				56
Electronics [Member] | Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs				16	196
Electronics [Member] | Design and Development [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs					984
PST Segment [Member]
Restructuring Cost and Reserve [Line Items]
Total business realignment charges	[2]	37	211	475	1,242
PST Segment [Member] | Cost of Goods Sold [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs		17	20	355	307
PST Segment [Member] | Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs		19	$ 191	119	819
PST Segment [Member] | Design and Development [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs		$ 1		$ 1	$ 116
[1]	Severance costs for the three and nine months ended September 30, 2017 related to SG&A were $16. Severance costs for the nine months ended September 30, 2017 related to COGS were $56. Severance costs for the nine months ended September 30, 2016 related to SG&A and design and development (“D&D”) were $196 and $984, respectively.
[2]	Severance costs for the three months ended September 30, 2017 related to COGS, SG&A and D&D were $17, $19 and $1, respectively. Severance costs for the three months ended September 30, 2016 related to COGS and SG&A were $20 and $191, respectively.

Business Realignment and Corp59

Business Realignment and Corporate Headquarter Relocation (Schedule of Business Realignment Charges Classified by Statement of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Restructuring Cost and Reserve [Line Items]
Total business realignment charges	$ 53	$ 211	$ 547	$ 2,422
Cost of Goods Sold [Member]
Restructuring Cost and Reserve [Line Items]
Total business realignment charges	17	20
Design and Development [Member]
Restructuring Cost and Reserve [Line Items]
Total business realignment charges	1
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Total business realignment charges	$ 35	$ 191

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Taxes [Abstract]
Provision for income taxes	$ 3,809	$ 919	$ 13,569	$ 3,114
Effective income tax rate	32.10%	8.40%	34.20%	10.30%

Segment Reporting (Narrative) (

Segment Reporting (Narrative) (Details)	9 Months Ended
	Sep. 30, 2017segment
Segment Reporting [Abstract]
Number of reportable segments	3

Segment Reporting (Schedule of

Segment Reporting (Schedule of Segment Reporting Information, by Segment) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Net Sales:
Total net sales		$ 203,582	$ 173,846	$ 617,004	$ 523,365
Operating Income (Loss)
Total operating income (loss)		13,296	11,780	44,136	33,912
Total income before income taxes		11,858	10,900	39,710	30,199
Interest Expense, net:
Interest expense, net		1,508	1,684	4,436	5,038
Capital Expenditures:
Capital expenditures				24,892	18,484
Total Assets:
Total assets		540,269		540,269		$ 394,529
Continuing Operations [Member]
Net Sales:
Total net sales		203,582	173,846	617,004	523,365
Depreciation and Amortization:
Total depreciation and amortization	[1]	7,096	5,979	20,672	17,118
Interest Expense, net:
Interest expense, net		1,508	1,684	4,436	5,038
Capital Expenditures:
Capital expenditures		9,725	6,478	24,892	18,484
Total Assets:
Total assets		540,269		540,269		394,529
Operating Segments [Member] | Continuing Operations [Member]
Operating Income (Loss)
Total operating income (loss)		13,296	11,780	44,136	33,912
Intersegment Eliminations [Member] | Continuing Operations [Member]
Net Sales:
Total net sales		(10,222)	(9,925)	(33,952)	(26,154)
Total Assets:
Total assets		(336,498)		(336,498)		(250,494)
Electronics [Member]
Net Sales:
Total net sales		80,313	57,299	237,307	182,907
Electronics [Member] | Operating Segments [Member] | Continuing Operations [Member]
Net Sales:
Total net sales		71,354	47,804	206,769	158,201
Operating Income (Loss)
Total operating income (loss)		4,896	3,735	13,267	12,050
Depreciation and Amortization:
Total depreciation and amortization		2,136	996	5,947	3,076
Interest Expense, net:
Interest expense, net		24	33	68	196
Capital Expenditures:
Capital expenditures		2,417	1,244	6,451	5,229
Total Assets:
Total assets		245,568		245,568		99,964
Electronics [Member] | Inter-Segment [Member] | Continuing Operations [Member]
Net Sales:
Total net sales		8,959	9,495	30,538	24,706
Control Devices [Member]
Net Sales:
Total net sales		107,960	104,130	342,985	306,405
Control Devices [Member] | Operating Segments [Member] | Continuing Operations [Member]
Net Sales:
Total net sales		106,842	103,700	339,716	304,957
Operating Income (Loss)
Total operating income (loss)		16,249	15,319	55,257	47,133
Depreciation and Amortization:
Total depreciation and amortization		2,664	2,561	8,050	7,345
Interest Expense, net:
Interest expense, net		19	56	84	172
Capital Expenditures:
Capital expenditures		5,523	3,229	13,318	9,260
Total Assets:
Total assets		166,641		166,641		150,623
Control Devices [Member] | Inter-Segment [Member] | Continuing Operations [Member]
Net Sales:
Total net sales		1,118	430	3,269	1,448
Corporate [Member] | Continuing Operations [Member]
Interest Expense, net:
Interest expense, net		1,087	661	2,802	1,984
Capital Expenditures:
Capital expenditures	[2]	811	1,365	2,224	1,479
Total Assets:
Total assets	[2]	356,396		356,396		287,031
Corporate [Member] | Operating Segments [Member] | Continuing Operations [Member]
Operating Income (Loss)
Total operating income (loss)	[3]	(8,867)	(7,303)	(27,108)	(21,092)
Depreciation and Amortization:
Total depreciation and amortization		181	115	376	309
PST [Member]
Net Sales:
Total net sales		25,531	22,342	70,664	60,207
PST [Member] | Operating Segments [Member] | Continuing Operations [Member]
Net Sales:
Total net sales		25,386	22,342	70,519	60,207
Operating Income (Loss)
Total operating income (loss)		1,018	29	2,720	(4,179)
Depreciation and Amortization:
Total depreciation and amortization		2,115	2,307	6,299	6,388
Interest Expense, net:
Interest expense, net		378	934	1,482	2,686
Capital Expenditures:
Capital expenditures		974	640	2,899	2,516
Total Assets:
Total assets		108,162		108,162		$ 107,405
PST [Member] | Inter-Segment [Member] | Continuing Operations [Member]
Net Sales:
Total net sales		$ 145		$ 145
[1]	These amounts represent depreciation and amortization on property, plant and equipment and certain intangible assets.
[2]	Assets located at Corporate consist primarily of cash, intercompany loan receivables, fixed assets for the corporate headquarter building, equity investments and investments in subsidiaries.
[3]	Unallocated Corporate expenses include, among other items, finance, legal, human resources and information technology costs and share-based compensation.

Segment Reporting (Schedule o63

Segment Reporting (Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Net Sales:
Total net sales	$ 203,582	$ 173,846	$ 617,004	$ 523,365
Long-term Assets:
Total long-term assets	243,096		243,096		$ 153,636
Continuing Operations [Member]
Net Sales:
Total net sales	203,582	173,846	617,004	523,365
Long-term Assets:
Total long-term assets	243,096		243,096		153,636
Continuing Operations [Member] | North America [Member]
Net Sales:
Total net sales	113,402	108,605	358,275	321,973
Long-term Assets:
Total long-term assets	76,539		76,539		73,835
Continuing Operations [Member] | South America [Member]
Net Sales:
Total net sales	25,386	22,342	70,519	60,207
Long-term Assets:
Total long-term assets	62,500		62,500		63,497
Continuing Operations [Member] | Europe and Other [Member]
Net Sales:
Total net sales	64,794	$ 42,899	188,210	$ 141,185
Long-term Assets:
Total long-term assets	$ 104,057		$ 104,057		$ 16,304

Investments (Narrative) (Detail

Investments (Narrative) (Details) BRL in Thousands, $ in Thousands	May 16, 2017USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2016USD ($)	May 15, 2017	May 15, 2017	Sep. 30, 2017BRL	Sep. 30, 2017USD ($)	May 16, 2017BRL	May 16, 2017USD ($)	Dec. 31, 2016USD ($)	Jun. 30, 2016USD ($)	Dec. 31, 2015USD ($)
Schedule of Equity Method Investments [Line Items]
Cash payment at closing				$ 1,848
Noncontrolling interest												$ 13,762
Income (loss) from equity method investments		$ 465	$ 307	1,200	$ 603
PST Eletronicaltda [Member]
Schedule of Equity Method Investments [Line Items]
Percentage ownership in consolidated subsidiary						74.00%	74.00%
Percentage of additional noncontrolling interest acquired										26.00%	26.00%
Noncontrolling interest			13,704		13,704						$ 14,458	13,762	$ 14,171	$ 13,310
Dividends payable								BRL 22,143	$ 7,004	BRL 9,610	3,092
Dividends Payable, Price Index Adjustment								BRL 1,691	$ 535
PST Eletronicaltda [Member] | Noncontrolling Interest [Member]
Schedule of Equity Method Investments [Line Items]
Cash payment at closing	$ 1,500
Fair value of earn-out liability	$ 10,400	10,180
Carrying value of investment											31,453
Carrying value of foreign currency translation											$ (16,995)
Minda Stoneridge Instruments Ltd [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage								49.00%	49.00%
Equity method investments									$ 9,475			$ 7,952
Income (loss) from equity method investments		$ 465	$ 307	$ 1,200	$ 603

Investments (Schedule of Noncon

Investments (Schedule of Noncontrolling Interest) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Noncontrolling interest at beginning of period		$ 13,762
Net loss attributable to noncontrolling interest	$ (303)	(130)	$ (2,009)
PST Eletronicaltda [Member]
Noncontrolling interest at beginning of period	14,171	13,762	13,310
Net loss attributable to noncontrolling interest	(303)	(130)	(2,009)
Foreign currency translation	(164)	826	2,403
Comprehensive income (loss) related to noncontrolling interest	(467)	696	394
Acquisition of noncontrolling interest		$ (14,458)
Noncontrolling interest at end of period	$ 13,704		$ 13,704