Stoneridge (SRI) 10-Q 26 Oct 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Oct. 22, 2018
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		28,484,466
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2,018

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 60,655	$ 66,003
Accounts receivable, less reserves of $1,199 and $1,109, respectively	150,393	142,438
Inventories, net	86,755	73,471
Prepaid expenses and other current assets	22,107	21,457
Total current assets	319,910	303,369
Long-term assets:
Property, plant and equipment, net	111,012	110,402
Intangible assets, net	63,052	75,243
Goodwill	37,155	38,419
Investments and other long-term assets, net	28,123	31,604
Total long-term assets	239,342	255,668
Total assets	559,252	559,037
Current liabilities:
Current portion of debt	1,808	4,192
Accounts payable	91,272	79,386
Accrued expenses and other current liabilities	52,663	52,546
Total current liabilities	145,743	136,124
Long-term liabilities:
Revolving credit facility	101,000	121,000
Long-term debt, net	1,218	3,852
Deferred income taxes	17,170	18,874
Other long-term liabilities	24,722	35,115
Total long-term liabilities	144,110	178,841
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 28,483 and 28,180 shares outstanding at September 30, 2018 and December 31, 2017, respectively, with no stated value
Additional paid-in capital	230,229	228,486
Common Shares held in treasury, 483 and 786 shares at September 30, 2018 and December 31, 2017, respectively, at cost	(8,875)	(7,118)
Retained earnings	133,803	92,264
Accumulated other comprehensive loss	(85,758)	(69,560)
Total shareholders' equity	269,399	244,072
Total liabilities and shareholders' equity	$ 559,252	$ 559,037

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Statement Of Financial Position [Abstract]
Accounts receivable, reserves (in dollars)	$ 1,199	$ 1,109
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	28,483,000	28,180,000
Common shares held in treasury, shares	483,000	786,000

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Total net sales	$ 208,853	$ 203,582	$ 655,385	$ 617,004
Costs and expenses:
Cost of goods sold	145,568	141,033	456,713	429,890
Selling, general and administrative	32,589	37,277	105,106	107,247
Design and development	12,384	11,976	39,226	35,731
Operating income	18,312	13,296	54,340	44,136
Interest expense, net	1,155	1,508	3,679	4,436
Equity in earnings of investee	(249)	(465)	(1,435)	(1,200)
Other expense (income), net	647	395	(216)	1,190
Income before income taxes	16,759	11,858	52,312	39,710
Provision for income taxes	3,467	3,809	10,520	13,569
Net income	13,292	8,049	41,792	26,141
Net loss attributable to noncontrolling interest				(130)
Net income attributable to Stoneridge, Inc.	$ 13,292	$ 8,049	$ 41,792	$ 26,271
Earnings per share attributable to Stoneridge, Inc.:
Basic (in dollars per share)	$ 0.47	$ 0.29	$ 1.47	$ 0.94
Diluted (in dollars per share)	$ 0.46	$ 0.28	$ 1.44	$ 0.92
Weighted-average shares outstanding:
Basic (in shares)	28,452,807	28,135,705	28,383,843	28,062,438
Diluted (in shares)	29,065,046	28,652,342	29,073,100	28,612,626

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement Of Other Comprehensive Income [Abstract]
Net income		$ 13,292	$ 8,049	$ 41,792	$ 26,141
Less: Net loss attributable to noncontrolling interest					(130)
Net income attributable to Stoneridge, Inc.		13,292	8,049	41,792	26,271
Other comprehensive income (loss), net of tax attributable to Stoneridge, Inc.:
Foreign currency translation		(3,339)	6,483	(16,866)	15,822
Unrealized gain (loss) on derivatives	[1]	32	(138)	668	172
Other comprehensive income (loss), net of tax attributable to Stoneridge, Inc.		(3,307)	6,345	(16,198)	15,994
Comprehensive income (loss) attributable to Stoneridge, Inc.		$ 9,985	$ 14,394	$ 25,594	$ 42,265
[1]	Net of tax expense (benefit) of $47 and $(74) for the three months ended September 30, 2018 and 2017, respectively. Net of tax expense of $218 and $93 for the nine months ended September 30, 2018 and 2017, respectively.

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement Of Other Comprehensive Income [Abstract]
Tax expense (benefit) for unrealized gain (loss) on derivatives	$ 47	$ (74)	$ 218	$ 93

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
OPERATING ACTIVITIES:
Net income	$ 41,792	$ 26,141
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	17,073	15,922
Amortization, including accretion of deferred financing costs	5,112	4,993
Deferred income taxes	2,399	6,233
Earnings of equity method investee	(1,435)	(1,200)
(Loss) gain on sale of fixed assets	(21)	6
Share-based compensation expense	4,214	5,713
Tax benefit related to share-based compensation expense	(879)	(759)
Change in fair value of earn-out contingent consideration	1,918	4,645
Changes in operating assets and liabilities, net of effect of business combination:
Accounts receivable, net	(15,145)	(18,232)
Inventories, net	(18,041)	(6,564)
Prepaid expenses and other assets	(1,086)	1,530
Accounts payable	15,280	11,611
Accrued expenses and other liabilities	(3,543)	1,079
Net cash provided by operating activities	47,638	51,118
INVESTING ACTIVITIES:
Capital expenditures	(22,816)	(24,892)
Proceeds from sale of fixed assets	44	66
Insurance proceeds for fixed assets	1,403
Business acquisition, net of cash acquired		(77,258)
Net cash used for investing activities	(21,369)	(102,084)
FINANCING ACTIVITIES:
Acquisition of noncontrolling interest, including transaction costs		(1,848)
Revolving credit facility borrowings	27,500	91,000
Revolving credit facility payment	(47,500)	(32,000)
Proceeds from issuance of debt	369	2,557
Repayments of debt	(4,372)	(10,307)
Other financing costs		(61)
Repurchase of Common Shares to satisfy employee tax withholding	(4,206)	(2,222)
Net cash (used for) provided by financing activities	(28,209)	47,119
Effect of exchange rate changes on cash and cash equivalents	(3,408)	4,249
Net change in cash and cash equivalents	(5,348)	402
Cash and cash equivalents at beginning of period	66,003	50,389
Cash and cash equivalents at end of period	60,655	50,791
Supplemental disclosure of cash flow information:
Cash paid for interest	3,899	4,286
Cash paid for income taxes, net	$ 14,899	$ 5,745

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2018
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, 2018 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 2017 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, 2018. See Note 4 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 as of May 16, 2017. 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, 2018
Recently Issued Accounting Standards [Abstract]
Recently Issued Accounting Standards	(2) Recently Issued Accounting Standards  Recently Adopted Accounting Standards  In January 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2017-01, “Clarifying the Definition of a Business”. This guidance 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 was effective for annual periods beginning after December 15, 2017. The Company adopted this standard on January 1, 2018, which did not have a material impact on its condensed consolidated financial statements.  In October 2016, the FASB issued ASU 2016-16, “ Accounting for Income Taxes: Intra-Entity Asset Transfers of Assets Other than Inventory (Topic 740) ”. This guidance requires that the tax effects of all intra-entity sales of assets other than inventory be recognized in the period in which the transaction occurs. The Company adopted this standard on January 1, 2018, which did not 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 was effective for interim and annual periods beginning after December 15, 2017. The Company adopted this standard as of January 1, 2018, which did not have a material impact on its condensed consolidated financial statements. In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers” and related amendments, which is the new comprehensive revenue recognition standard (collectively known as Accounting Standard Codification (“ASC”) 606) that has superseded 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. The Company adopt ed this standard on January 1, 2018 using the modified retrospective transition method. Under the modified retrospective method, the Company would have recognize d the cumulative effect of initially applying the standard as an adjustment to opening retained earnings at the date of initial application; however, the Company did not have any material adjustments as of the date of the adoption. The Company has not experienced a material impact on its results of operations from the adoption of ASC 606 ; however, the Company has expand ed its disclosures consistent with the requirements of the new standard and the Company will continue to evaluate new contracts to apply the framework of ASC 606. In particular , the Company will evaluate new 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 majority of our revenue continues to be recognized when products are shipped from our manufacturing facilities. The Company has not changed how it accounts for reimbursable pre-production costs, currently accounted for as a reduction of costs incurred . Refer to Note 3 for the expanded revenue disclosures.  Accounting Standards Not Yet Adopted In January 2018, the FASB issued ASU 2018-02, “Income Statement – Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.” This guidance gives entities the option to reclassify to retained earnings the tax effects resulting from the enactment of Tax Cuts and Jobs Act related to items in accumulated other comprehensive income (“AOCI”) that the FASB refers to as having been stranded in AOCI. The new guidance is effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. Early adoption is permitted for periods for which financial statements have not yet been issued or made available for issuance, including the period the Tax Legislation was enacted. The Company will adopt this standard as of January 1, 2019, which is not expected to have a material impact on its condensed consolidated financial statements.  In June 2016, the FASB issued ASU 2016-13, “Financial Instruments - Credit Losses (Topic 326) Measurement of Credit Losses on Financial Instruments” , which requires measurement and recognition of expected credit losses for financial assets held and requires enhanced disclosures regarding significant estimates and judgments used in estimating credit losses. ASU 2016-13 is effective for public business entities for annual periods beginning after December 15, 2019, and early adoption is permitted for annual periods beginning after December 15, 2018. The Company is currently evaluating the impact of its pending adoption of ASU 2016-13 on the consolidated financial statements. The Company will adopt this standard as of January 1, 2020 and it is not expected to have a material impact 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 new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The Company will adopt this standard as of January 1, 2019 using the modified retrospective approach and will elect the transition option to use the effective date January 1, 2019, as the date of initial application. The Company will not adjust its comparative period financial statements for effects of the ASU 2016-02, or make the new required lease disclosures for periods before the effective date. The Company will recognize its cumulative effect transition adjustment as of the effective date. In addition, the Company intends to elect the package of practical expedients permitted under the transition guidance within the new standard. The Company is currently evaluating the impact of this standard on the financial statements and disclosures, internal controls and accounting policies. This evaluation process includes reviewing all forms of leases and performing a completeness assessment over the lease population. The Company has launched a project to implement a third party supported lease accounting system solution, establish a new lease accounting process and design related internal controls. The recognition, measurement and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from current GAAP. While the Company's evaluation is ongoing, the Company does not expect the adoption of the new standard to have a material impact on its results of operations, however, it will have a material impact on the condensed consolidated balance sheet as right of use assets and lease liabilities will be recorded for all long-term operating leases.

Revenue

Revenue	9 Months Ended
	Sep. 30, 2018
Revenue [Abstract]
Revenue	( 3 ) Revenue  The Company adopted ASC 606 using the modified retrospective method as applied to customer contracts that were not completed as of January 1, 2018. As a result, financial information for reporting periods beginning after January 1, 2018 are presented under ASC 606, while comparative financial information has not been adjusted and continues to be reported in accordance with the Company’s historical accounting policy for revenue recognition prior to the adoption of ASC 606. The Company did not record a cumulative adjustment related to the adoption of ASC 606, and the effects of the adoption were not significant.  Revenue is recognized when obligations under the terms of a contract with our customer are satisfied; generally this occurs with the transfer of control of our products and services , which is usually when the parts are shipped or delivered to the customer’s premises . Revenue is measured as the amount of consideration we expect to receive in exchange for transferring goods or providing services. The transaction price will include estimates of variable consideration to the extent it is probable that a significant reversal of revenue recognized will not occur. Incidental items that are not significant in the context of the contract are recognized as expense. The expected costs associat ed with our base warranties continue to be recognized as expense when the products are sold. Customer returns only occur if products do not meet the specifications of the contract and are not connected to any repurchase obligations of the Company.  The Company does not have any financing components or significant payment terms as payment occurs shortly after the point of sale . Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction that are collected by the Company from a customer are excluded from revenue. Amounts billed to customers related to shipping and handling costs are included in net sales in the condensed consolidated statements of operations. Shipping and handling costs associated with outbound freight after control over a product is transferred to the customer are accounted for as a fulfillment cost and are included in cost of sales.  Revenue by Reportable Segment  Control Devices. Our Control Devices segment designs and manufactures products that monitor, measure or activate specific functions within a vehicle. This segment includes product lines such as sensors, actuators, valves and switches. We sell these products principally to the automotive market in the North American, European, and Asia Pacific regions. To a lesser extent, we also sell these products to the commercial vehicle and agricultural markets in our North America and European regions. Our customers included in these markets primarily consist of original equipment manufacturers (“OEM”) and companies supplying components directly to the OEMs (“tier one supplier”).  Electronics. Our Electronics segment designs and manufactures electronic instrument clusters, electronic control units and other driver information systems and includes the acquired Orlaco business, which designs and manufactures camera-based vision systems, monitors and related products. These products are sold principally to the commercial vehicle market primarily through our OEM and aftermarket channels in the North American and European regions, and to a lesser extent, the Asia Pacific region. The camera-based vision systems and related products are sold principally to the off-highway vehicle market in the North American and European regions.  PST. Our PST segment primarily serves the South American region and specializes in the design, manufacture and sale of in-vehicle audio and video devices, electronic vehicle security alarms, convenience accessories, vehicle tracking devices and monitoring services primarily for the automotive and motorcycle markets. PST sells its products through the aftermarket distribution channel, to factory authorized dealer installers, also referred to as original equipment services, direct to OEMs and through mass merchandisers.  The following tables disaggregate our revenue by reportable segment and geographical location (1) for the periods ended September 30, 2018 and 2017:     Three months ended September 30 Control Devices Electronics PST Consolidated  Net Sales: 2018 2017 2018 2017 2018 2017 2018 2017  North America $ 97,017 $ 96,314 $ 22,458 $ 17,088 $ - $ - $ 119,475 $ 113,402  South America - - - - 18,864 25,386 18,864 25,386  Europe 4,174 2,009 58,315 53,190 - - 62,489 55,199  Asia Pacific 7,211 8,519 814 1,076 - - 8,025 9,595  Total net sales $ 108,402 $ 106,842 $ 81,587 $ 71,354 $ 18,864 $ 25,386 $ 208,853 $ 203,582      Nine months ended September 30 Control Devices Electronics PST Consolidated  Net Sales: 2018 2017 2018 2017 2018 2017 2018 2017  North America $ 300,024 $ 312,320 $ 64,765 $ 45,955 $ - $ - $ 364,789 $ 358,275  South America - - - - 59,742 70,519 59,742 70,519  Europe 10,734 5,657 194,270 158,522 - - 205,004 164,179  Asia Pacific 22,957 21,739 2,893 2,292 - - 25,850 24,031  Total net sales $ 333,715 $ 339,716 $ 261,928 $ 206,769 $ 59,742 $ 70,519 $ 655,385 $ 617,004  (1) Company sales based on geographic location are where the sale originates not where the customer is located.  Performance Obligations  For OEM and tier one supplier customers, the Company typically enters into contracts with its customers to provide serial production parts that consist of a set of documents including, but not limited to, an award letter, master purchase agreement and master terms and conditions. For each production product, the Company enters into separate purchase orders that contain the product specifications and an agreed-upon price. The performance obligation does not exist until a customer release is received for a specific number of parts. The majority of the parts sold to OEM and tier one suppliers are specifically customized to the specific customer, with the exception of off-highway products that are common across all customers. The transaction price is equal to the contracted price per part and there is no expectation of material variable consideration in the transaction price. For most customer contracts, the Company does not have an enforceable right to payment at any time prior to when the parts are shipped or delivered to the customer; therefore, the Company recognizes revenue at the point in time it satisfies a performance obligation by transferring control of a part to the customer. Certain customer contracts contain an enforceable right to payment if the customer terminates the contract for convenience and therefore are recognized over time using the cost to complete input method.  Our aftermarket products are focused on meeting the demand for repair and replacement parts, compliance parts and accessories and are sold primarily to aftermarket distributors and mass retailers in our South American, European and North American markets. Aftermarket products have one type of performance obligation which is the delivery of aftermarket parts and spare parts. For aftermarket customers, the Company typically has standard terms and conditions for all customers. In addition, aftermarket products have alternative use as they can be sold to multiple customers. Revenue for aftermarket part production contracts is recognized at a point in time when the control of the parts transfer to the customer which is based on the shipping terms. Aftermarket contracts may include variable consideration related to discounts and rebates and is included in the transaction price upon recognizing the product revenue.  A small portion of the Company’s sales are comprised of monitoring services that include both monitoring devices and fees to individual, corporate, fleet and cargo customers in our PST segment. These monitoring service contracts are generally not capable of being distinct and are accounted for as a single performance obligation. We recognize revenue for our monitoring products and service s contracts over the life of the contract. There is no variable consideration associated with these contracts. The Company has the right to consideration from a customer in the amount that corresponds directly with the value to the customer of the Company’s performance to date. Therefore the Company recognizes revenue over time using the practical expedient ASC 606-10-55-18 in the amount the Company has a “right to invoice” rather than selecting an output or input method.  Contract Balances  The Company had no material contract assets , contract liabilities or capitalized contract acquisition costs as of September 30, 2018.

Acquisition of Orlaco

Acquisition of Orlaco	9 Months Ended
	Sep. 30, 2018
Acquisition of Orlaco [Abstract]
Acquisition of Orlaco	( 4 ) 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 integrate s Orlaco’s vision processing technology and Stoneridge’s driver information capabilities as well as the combine s software capabilities of both businesses. The ac quisition of Orlaco enhances our Electronics segment ’s global technical capabilities in vision systems and facilitates entry into new markets. The aggregate consideration for the Orlaco acquisition on January 31, 2017 was €74,939 ( $79,675 ), which included customary estimated adjustments to the purchase price. The Company is required to pay an additional amount up to €7,500 ( $ 8,706 ) as contingent consideration (“earn-out consideration”) if certain performance targets are achiev ed 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  Refer to the Company’s 2017 Form 10-K for additional information on the acquisition including the fair value of assets acquired and liabilities assumed on the acquisition date and the fair value measurement methods and classifications.  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. There were no acquisition related costs for the nine months ended September 30 , 2018.         The Company’s statement of operations for the three and nine m onths ended September 30 , 2017 includes $0 and $1,636 , respectively, of expense in cost of goods sold (“COGS”) associated with the step-up of the Orlaco inventory to fair value . The Company’s statement of operations for the nine m onths ended September 30, 2018 includes $369 of expense for the fair value adjustment for earn-out consideration in SG&A expenses . There was no fair value adjustment for the earn-out consideration for three months ended September 30, 2018 due to the earn-out liability being capped in the first quarter of 2018. The Company’s statement of operations for the three and nine m onths ended September 30, 2017 included $1,823 and $3,92 6 of expense for the fair value adjustment for earn-out consideration in SG&A expenses . See Note 6 for the fair value and foreign currency adjustments of the earn-out consideration . 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, 2017. 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.    Nine months ended  September 30,  2017   Net sales $ 622,034  Net income attributable to Stoneridge, Inc. and subsidiaries $ 26,375   The unaudited pro forma financial information presented in the table above has been adjusted to give effect to adjustments that are directly related to the business combination and are factually supportable. These adjustments primarily include depreciation and amortization related to fair value adjustments to property, plant, and equipment and finite-lived intangible assets.

Inventories

Inventories	9 Months Ended
	Sep. 30, 2018
Inventories [Abstract]
Inventories	( 5 ) 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,  2018 2017  Raw materials $ 58,341 $ 47,588  Work-in-progress 5,395 5,806  Finished goods 23,019 20,077  Total inventories, net $ 86,755 $ 73,471  Inventory valued using the FIFO method was $ 69,817 and $54,837 at September 30, 2018 and December 31, 2017 , respectively. Inventory valued using the average cost method was $16,938 and $18,634 at September 30 , 201 8 and December 31, 2017 , respectively.  .

Financial Instruments and Fair

Financial Instruments and Fair Value Measurements	9 Months Ended
	Sep. 30, 2018
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, 2018, 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 2018 and 2017 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 2018. 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, 2018 and December 31, 2017, the Company held foreign currency forward contracts with underlying notional amounts of $920 and $1,486 , respectively, to reduce the exposure related to the Company’s euro-denominated intercompany loans. The current contract expires in June 201 9. The euro-denominated foreign currency forward contract was not designated as a hedging instrument. The Company recognized a gain of $10 and a loss of $36 for the three months ended September 30, 2018 and 201 7, 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, 2018 and 2017, the Company recognized a gain of $52 and a loss of $164 , respectively, related to this contract. U. S. dollar-denominated Foreign Currency Forward Contracts – Cash Flow Hedges The Company entered into on behalf of one of its European Electronics subsidiaries whose functional currency is the Swedish krona, U.S. dollar-denominated currency contracts with a notional amount at September 30, 2018 of $2,000 which expire ratably on a monthly basis from October 2018 through December 2018. There were no such contracts at December 31, 2017.  The Company entered into on behalf of one of its European Electronics subsidiaries whose functional currency is the euro, U.S. dollar-denominated currency contracts with a notional amount at September 30, 2018 of $500 which expire ratably on a monthly basis from October 2018 through December 2018. There were no such contracts at December 31, 2017.  The Company evaluated the effectiveness of the U.S. dollar-denominated foreign currency forward contracts held as of September 30, 2018 and concluded that the hedges were highly effective .  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, 2018 of $4,612 which expire ratably on a monthly basis from October 2018 through December 2018, compared to a notional amount of $9,143 at December 31, 2017.  The Company evaluated the effectiveness of the Mexican peso-denominated foreign currency forward contracts held as of September 30 , 2018 and December 31, 2017 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,  2018 2017 2018 2017 2018 2017  Derivatives designated as hedging instruments:  Cash flow hedges:  Forward currency contracts $ 7,112 $ 9,143 $ 665 $ - $ - $ 221  Derivatives not designated as hedging instruments:  Forward currency contracts $ 920 $ 1,486 $ 4 $ - $ - $ 48    (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 reclassified from  Gain recorded in other other comprehensive income  comprehensive income (loss) (loss) into net income (A)  2018 2017 2018 2017  Derivatives designated as cash flow hedges:  Forward currency contracts $ 637 $ 56 $ 558 $ 268    Gross amounts recorded for the cash flow hedges in ot her comprehensive income (loss) and in net income for the nine months ended September 30 are as follows:    Gain reclassified from  Gain recorded in other other comprehensive income  comprehensive income (loss) (loss) into net income (A)  2018 2017 2018 2017  Derivatives designated as cash flow hedges:  Forward currency contracts $ 1,819 $ 717 $ 933 $ 452  (A) Gains reclassified from other comprehensive income (loss) into net income recognized in cost of goods sold in the Company's condensed consolidated statements of operations were $495 and $834 for the three and nine months ended September 30, 2018, respectively. Gains reclassified from other comprehensive income (loss) into net income recognized in design and development (“D&D”) in the Company's condensed consolidated statements of operations were $63 and $99 for the three and nine months ended September 30, 2018, respectively. Gains reclassified from other comprehensive income (loss) were recognized in cost of goods sold for the three and nine months ended September 30, 2017.  The net deferred gain of $ 665 on the cash flow hedge derivatives will be reclassified from other comprehensive income (loss) to the condensed consolidated statements of operations through December 2018.        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, 2018 December 31, 2017  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 $ 669 $ - $ 669 $ - $ -  Total financial assets carried at fair value $ 669 $ - $ 669 $ - $ -   Financial liabilities carried at fair value:  Forward currency contracts $ - $ - $ - $ - $ 269  Earn-out consideration 20,002 - - 20,002 20,746  Total financial liabilities carried at fair value $ 20,002 $ - $ - $ 20,002 $ 21,015  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, 2017 $ 8,637 $ 12,109 $ 20,746  Change in fair value 369 1,549 1,918  Foreign currency adjustments (300) (2,362) (2,662)  Balance at September 30, 2018 $ 8,706 $ 11,296 $ 20,002     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 consideration obligations related to Orlaco and PST are recorded within other current liabilities and other long-term liabilities, respectively, in the condensed consolidated balance sheet as of September 30, 2018. The fair value for the Orlaco earn-out consideration is based on a Monte Carlo simulation utilizing forecasted earnings before interest, taxes, depreciation and amortization (“EBITDA”) for the 2017 and 2018 earn-out period as well as a growth rate reduced by the market required rate of return. The Company will be required to pay the PST earn-out consideration, which is not capped, based on PST’s financial performance in either 2020 or 2021. The fair value of the PST earn-out consideration is based on discounted cash flows utilizing forecasted EBITDA in 2020 and 2021 using the key inputs of forecasted sales and expected operating income reduced by the market required rate of return . 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 offset by foreign currency translation. The Orlaco earn-out consideration reached the capped amount of €7,500 as of the quarter ended March 31, 2018. The net decrease in fair value of earn-out consideration for PST was due to foreign currency translation partially offset by the reduced time from the current period end to the payment date. The fair value adjustments of Orlaco and PST earn-out considerations are recorded in SG&A in the condensed consolidated statements of operations. The foreign currency impact for the PST earn-out considerations is included in other expense (income), net in the condensed consolidated statements of operations.  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, 2018.  Except for the fair value of assets acquired and liabilities assumed related to the Orlaco acquisition discussed in the Company’s 2017 Form 10-K, there were no non-recurring fair value measurements for the periods presented.

Share-Based Compensation

Share-Based Compensation	9 Months Ended
	Sep. 30, 2018
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 $1,376 and $1,648 for the three months ended September 30 , 2018 and 2017, respectively . For the nine months ended September 30, 2018 total share-based compensation was $4,214 compared to $5,713 for the nine months ended September 30, 2017. The nine months ended September 30, 2018 included the forfeiture of certain grants associated with employee resignations . The nine months ended September 30, 2017 included expenses related to accelerated expense associated with the retirement of eligible employees . 

Debt

Debt	9 Months Ended
	Sep. 30, 2018
Debt [Abstract]
Debt	 (8) Debt  Debt consisted of the following at September 30, 2018 and December 31, 2017 :     September 30, December 31, Interest rates at  2018 2017 September 30, 2018 Maturity  Revolving Credit Facility  Credit Facility $ 101,000 $ 121,000 3.16% - 3.30% September 2021   Debt  PST short-term obligations 675 - 11.26% March 2019  PST long-term notes 2,351 8,016 8.0% - 10.0% 2019 -2021  Other - 28  Total debt 3,026 8,044  Less: current portion (1,808) (4,192)  Total long-term debt, net $ 1,218 $ 3,852      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 to the Amended Agreement , 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 R eorganization, and consented to the Orlaco acquisition. As a result of Amendment No. 4 to the Amended Agreement , the Company capitalized deferred financing costs of $61 , which will be amortized over the remaining term of the Credit Facility. On September 11, 2018, the Company entered into Amendment No. 5 to the Amended Agreement which extended financial accommodations to permit the Company to invest in certain funds in an amount that does not exceed $10,000 .  On October 26, 2018, the Company entered into Consent and Amendment No. 6 to the Amended Agreement which amended certain definitions, sections and schedules of the Credit Facility and consented to realignment of certain foreign subsidiaries, and permits the Company to repurchase the Company’s outstanding common shares in an amount that does not exceed $50,000 .  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 $101,000 and $121,000 at September 30 , 201 8 and December 31, 201 7 , respectively. Borrowing s de creased under the Credit Facility due to voluntary principal repayments.  The Company was in compliance with all Credit Facility covenants at September 30, 2018 and December 31, 2017 .  The Company also has outstanding letters of credit of $2,008 at September 30 , 201 8 and December 31, 201 7 .  Debt PST maintains several short-term obligations and long-term notes used for working capital purposes which have fixed or variable interest rates. The weighted-average interest rates of short term and long-term debt of PST at September 30 , 2018 was 11.26% and 8.65% . Depending on the specific note, interest is payable either monthly or annually. Principal repayments on PST debt at September 30, 2018 are as follows : $ 1,808 from October 2018 through September 2019, $ 330 from October 2019 through December 2019, $ 465 in 2020 and $ 423 in 20 21 . PST was in compliance with all debt covenants at September 30, 2018 and December 31, 201 7.  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 $2,250 and $2,439 , at September 30 , 201 8 and December 31, 201 7 , respectively. At September 30 , 201 8 and December 31, 2017 , there was no balance outstanding on this overdraft credit line.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2018
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. The weighted-average dilutive Common Shares calculation excludes the excess tax benefit from the treasury stock met hod for the three and nine months ended September 30, 2018 and 2017.  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,  2018 2017 2018 2017  Basic weighted-average Common Shares outstanding 28,452,807 28,135,705 28,383,843 28,062,438  Effect of dilutive shares 612,239 516,637 689,257 550,188  Diluted weighted-average Common Shares outstanding 29,065,046 28,652,342 29,073,100 28,612,626  There were no performance- based rest ricted Common Shares outstanding at September 30, 2018 or 2017. There were 626,500 and 781,977 performance-based right to receive Common Shares outstanding at September 30, 2018 and 2017, respectively. The 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, 2018
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 , 2018 and 2017 were as follows:     Foreign Unrealized  currency gain (loss)  translation on derivatives Total  Balance at July 1, 2018 $ (82,944) $ 493 $ (82,451)   Other comprehensive income (loss) before reclassifications (3,339) 258 (3,081)  Amounts reclassified from accumulated other  comprehensive loss - (226) (226)  Net other comprehensive income (loss), net of tax (3,339) 32 (3,307)  Balance at September 30, 2018 $ (86,283) $ 525 $ (85,758)   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)     Changes in accumulated other comprehensive loss for the nine months ended September 30 , 2018 and 2017 were as follows:     Foreign Unrealized  currency gain (loss)  translation on derivatives Total  Balance at January 1, 2018 $ (69,417) $ (143) $ (69,560)   Other comprehensive income (loss) before reclassifications (16,866) 1,372 (15,494)  Amounts reclassified from accumulated other  comprehensive loss - (704) (704)  Net other comprehensive income (loss), net of tax (16,866) 668 (16,198)  Balance at September 30, 2018 $ (86,283) $ 525 $ (85,758)   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) - (16,995)  Balance at September 30, 2017 $ (69,068) $ 154 $ (68,914)  

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2018
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 condensed 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 and engaged an environmental engineering consultant to develop a remediation and monitoring plan for the site. Soil remediation at the site was completed during the year ended December 31, 2010. A remedial action plan was approved by the Florida Departme nt of Environmental Protection and groundwater remediation began in the fourth quarter of 2015. During the three and nine months ended September 30 , 2018 and 2017 , environmental remediation costs incurred were immaterial. At September 30, 2018 and December 31, 201 7 , the Company accrued a remaining undiscounted liability of $155 and $265 , respectively, related to future remediation costs. At September 30 , 201 8 and December 31, 201 7 , $155 and $253 , 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 t o the ongoing site remediation, the Company is currently required to maintain a $1,489 letter of credi t for the benefit of the buyer.  The Company’s PST subsidiary 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$30,100 ( $7,400 ) and R$33,800 ( $10,200 ) at September 30, 2018 and December 31, 201 7 , respectively. An unfavorable outcome on these contingencies could result in significant cost to the Company and adversely affect its results of operations.  Insurance Recoveries  The Company incurred losses and incremental costs related to the damage to assets caused by a storm at its Mexican production facility in the fourth quarter of 2016 and is pursuing recovery of such costs under applicable insurance policies. Anticipated proceeds from insurance recoveries related to losses and incremental costs that have been incurred (“loss recoveries”) are recognized when receipt is probable. Anticipated proceeds from insurance recoveries in excess of the net book value of damaged property, plant and equipment (“insurance gain contingencies”) are recognized when all contingencies related to the claim have been resolved.  L oss recoveries related to the damage of inventory and incremental costs included in costs of sales were not significant for the three and nine months ended September 30, 2018 and 2017, respectively . There were no l oss recoveries and insurance gain contingencies recognized in the three and nine months ended September 30, 2018 and 2017 related to the damage of property, plant and equipment included within SG&A expense. As of December 31, 2017, the Company had confirmation of the open insurance claim and recorded a receivable of $1,644 . The cash payment was subsequently collected in January 2018. Cash proceeds related to the damage of inventory and incremental costs were $241 and $500 for the nine months ended September 30, 2018 and 2017, respectively, and are included in cash flows from operating activities at September 30, 2018 . Cash proceeds related to the damage of property, plant and equipment of $1,403 for the nine months ended September 30, 2018 are included in cash flows from investing activities at September 30, 2018 . There were no cash proceeds received during the three months ended September 30, 2018 and 2017.     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 $3,273 and $3,112 of a long-term liability at September 30, 2018 and December 31, 201 7 , 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 2018 2017  Product warranty and recall at beginning of period $ 9,978 $ 9,344  Accruals for products shipped during period 4,207 6,279  Assumed warranty liability related to Orlaco - 1,462  Aggregate changes in pre-existing liabilities due to claim developments 573 1,554  Settlements made during the period (4,259) (9,252)  Foreign currency translation (561) 381  Product warranty and recall at end of period $ 9,938 $ 9,768 

Business Realignment

Business Realignment	9 Months Ended
	Sep. 30, 2018
Business Realignment [Abstract]
Business Realignment	(1 2 ) 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 c osts (benefit) by reportable segment were as follows:    Three months ended Nine months ended  September 30, September 30,  2018 2017 2018 2017  Control Devices (A) $ 32 $ - $ 160 $ -  Electronics (B) (80) 16 215 72  PST (C) 35 37 354 475  Total business realignment costs (benefit) $ (13) $ 53 $ 729 $ 547  (A) Severance costs for the nine months ended September 30 , 2018 related to D&D were $128 . Severance costs for the three and nine months ended September 30, 2018 related to SG&A were $32 .  (B) Severance costs (benefit) for the three and nine months ended September 30, 2018 related to SG&A were $(80) and $215 , respec tively . 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 .  (C) Severance costs for the three and nine months ended September 30, 2018 related to SG&A were $19 and $312 , respectively. Sev eranc e costs for the three and nine months ended September 30, 2018 related to COGS were $16 and $42 , respectively. 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 nine months ended September 30, 2017 related to COGS, SG&A and D&D were $355, $119 and $1 , respectively .  Business realignment costs (benefit) classified by statement of operations line item were as follows:    Three months ended Nine months ended  September 30, September 30,  2018 2017 2018 2017  Cost of goods sold $ 16 $ 17 $ 42 $ 411  Selling, general and administrative (29) 35 559 135  Design and development - 1 128 1  Total business realignment charges (benefit) $ (13) $ 53 $ 729 $ 547

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2018
Income Taxes [Abstract]
Income Taxes	(13 ) Income Taxes  The Company recognized income tax expense of $ 3,467 and $3,809 for U.S. federal, state and foreign income taxes for the three months ended September 30, 2018 and 2017, respectively. The decrease in income tax expense for the three months ended September 30, 2018 compared to the same period for 2017 was primarily related to the impact of the Tax Cuts and Jobs Act (“Tax Legislation”) enacted in the United States on December 22, 2017. T he effective tax rate de creased to 20.7% in the third quarter of 2018 from 32.1% in the third quarter of 2017 primarily due the impact of the Tax Legislation compared to the same period in 2017.  The Company recognized income tax expense of $10,520 and $13,569 for U.S. federal, state and foreign income taxes for the nine months ended September 30, 2018 and 2017, respectively. The decrease in income tax expense for the nine months ended September 30, 2018 compared to the same period for 2017 was primarily related to the impact of the Tax Legislation. T he effective tax rate de creased to 20.1% in the first nine months of 2018 from 34.2% in the first nine months of 2017 primarily due the impact of the Tax Legislation compared to the same period in 2017.  The Company has recognized the estimated impact of the Tax Legislation to its 2018 tax position in its estimated annual effective tax rate (“EAETR”) calculation. The Company continues to examine the potential impact of certain provisions of the Tax Legislation that could affect its 2018 EAETR, including the provisions related to global intangible low-taxed income (“GILTI”), foreign derived intangible income (“FDII”) and the base erosion and anti-abuse tax (“BEAT”). Accordingly, the Company's 2018 EAETR may change in subsequent interim periods as additional analysis is completed.  The Tax Legislation significantly revises the U.S. corporate income tax by, among other things, lowering corporate income tax rates, imposing a one-time transition tax on deemed repatriated earnings of foreign subsidiaries, imposing a base erosion and anti-abuse tax, and imposing a tax on global intangible low taxed income. Pursuant to the guidance within SEC Staff Accounting Bulletin No. 118 (“SAB 118”), as of September 30, 2018, the Company continues to analyze certain aspects of the Tax Legislation and refine its assessment, the ultimate impact of the Tax Legislation may differ from these estimates due to continued analysis or further regulatory guidance that may be issued as a result of the Tax Legislation. 

Segment Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Segment Reporting	             (1 4 ) Segment Reporting Operating segments are defined as components of an enterprise that are eva luated 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 other driver information systems and includes the 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 2017 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,  2018 2017 2018 2017  Net Sales:  Control Devices $ 108,402 $ 106,842 $ 333,715 $ 339,716  Inter-segment sales 1,556 1,118 6,218 3,269  Control Devices net sales 109,958 107,960 339,933 342,985  Electronics (D) 81,587 71,354 261,928 206,769  Inter-segment sales 9,067 8,959 29,310 30,538  Electronics net sales 90,654 80,313 291,238 237,307  PST 18,864 25,386 59,742 70,519  Inter-segment sales - 145 2 145  PST net sales 18,864 25,531 59,744 70,664   Eliminations (10,623) (10,222) (35,530) (33,952)  Total net sales $ 208,853 $ 203,582 $ 655,385 $ 617,004  Operating Income (Loss):  Control Devices $ 16,297 $ 16,249 $ 51,336 $ 55,257  Electronics (D) 8,951 4,896 25,107 13,267  PST 668 1,018 1,553 2,720  Unallocated Corporate (A) (7,604) (8,867) (23,656) (27,108)  Total operating income $ 18,312 $ 13,296 $ 54,340 $ 44,136  Depreciation and Amortization:  Control Devices $ 3,070 $ 2,664 $ 8,762 $ 8,050  Electronics (D) 2,213 2,136 6,756 5,947  PST 1,583 2,115 5,828 6,299  Unallocated Corporate 200 181 596 376  Total depreciation and amortization (B) $ 7,066 $ 7,096 $ 21,942 $ 20,672  Interest Expense, net:  Control Devices $ 19 $ 19 $ 56 $ 84  Electronics 32 24 89 68  PST 230 378 762 1,482  Unallocated Corporate 874 1,087 2,772 2,802  Total interest expense, net $ 1,155 $ 1,508 $ 3,679 $ 4,436  Capital Expenditures:  Control Devices $ 3,938 $ 5,523 $ 12,996 $ 13,318  Electronics (D) 725 2,417 4,892 6,451  PST 522 974 2,477 2,899  Unallocated Corporate (C) 786 811 2,451 2,224  Total capital expenditures $ 5,971 $ 9,725 $ 22,816 $ 24,892             September 30, December 31,  2018 2017  Total Assets:  Control Devices $ 183,221 $ 164,632  Electronics 265,908 252,324  PST 81,267 100,382  Corporate (C) 346,842 377,657  Eliminations (317,986) (335,958)  Total assets $ 559,252 $ 559,037    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,  2018 2017 2018 2017  Net Sales:  North America $ 119,475 $ 113,402 $ 364,789 $ 358,275  South America 18,864 25,386 59,742 70,519  Europe and Other (D) 70,514 64,794 230,854 188,210  Total net sales $ 208,853 $ 203,582 $ 655,385 $ 617,004      September 30, December 31,  2018 2017   Long-term Assets:  North America $ 86,895 $ 89,997  South America 44,728 58,989  Europe and Other 107,719 106,682  Total long-term assets $ 239,342 $ 255,668               (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. (D) The amount for the nine months ended September 30, 2017 includes eight months of activity from the acquisition date of January 31, 2017 related to Orlaco which is disclosed in Note 4 .

Investments

Investments	9 Months Ended
	Sep. 30, 2018
Investments [Abstract]
Investments	  (1 5 ) Investments Minda Stoneridge Instruments Ltd. The Company has a 49% equity 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 $10,218 and $10,131 at September 30, 2018 and December 31, 201 7 , respectively. Equity in earnings of Minda included in the condensed consolidated statements of operations was $24 9 and $465 , for the three months ended September 30, 2018 and 2017 , respectively. Equity in earnings of Minda included in the condensed consolidated statements of operations was $1,435 and $1,200 , for the nine months ended September 30, 2018 and 2017 , 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 $10,180 and was based on discounted cash flows utilizing forecasted EBITDA in 2020 and 2021. The Company’s statement of operations for the three and nine m onths ended September 30, 2018 included $501 and $1,549 , respectively, of expense for the fair value adjustment for earn-out consideration in SG&A expenses . The Company’s statement of operations for the three and nine m onths ended September 30, 2017 included $475 and $ 719 , respectively, of expense for the fair value adjustment for earn-out consideration in SG&A expenses . See Note 6 for the fair value and foreign currency adjustments of the earn-out consideration . 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 in 2017:     Three months ended Nine months ended  September 30, September 30,  2017 2017  Noncontrolling interest at beginning of period $ - $ 13,762  Net loss - (130)  Foreign currency translation - 826  Comprehensive income - 696  Acquisition of noncontrolling interest - (14,458)  Noncontrolling interest at end of period $ - $ -  PST has dividends payable to former noncontrolling interest holders of R$23,096 Brazilian real ( $5,706 ) and R$22,330 Brazilian real ( $6,742 ) as of September 30 , 2018 and December 31, 2017, respectively. The dividends payable balance a t September 30 , 2018 includes R$766 Brazilian real ( $189 ) in monetary correction for the year to date September 30 , 2018 period. 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.

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Sep. 30, 2018
Revenue [Abstract]
Revenue by Segment and Geographical Location	 The following tables disaggregate our revenue by reportable segment and geographical location (1) for the periods ended September 30, 2018 and 2017:     Three months ended September 30 Control Devices Electronics PST Consolidated  Net Sales: 2018 2017 2018 2017 2018 2017 2018 2017  North America $ 97,017 $ 96,314 $ 22,458 $ 17,088 $ - $ - $ 119,475 $ 113,402  South America - - - - 18,864 25,386 18,864 25,386  Europe 4,174 2,009 58,315 53,190 - - 62,489 55,199  Asia Pacific 7,211 8,519 814 1,076 - - 8,025 9,595  Total net sales $ 108,402 $ 106,842 $ 81,587 $ 71,354 $ 18,864 $ 25,386 $ 208,853 $ 203,582      Nine months ended September 30 Control Devices Electronics PST Consolidated  Net Sales: 2018 2017 2018 2017 2018 2017 2018 2017  North America $ 300,024 $ 312,320 $ 64,765 $ 45,955 $ - $ - $ 364,789 $ 358,275  South America - - - - 59,742 70,519 59,742 70,519  Europe 10,734 5,657 194,270 158,522 - - 205,004 164,179  Asia Pacific 22,957 21,739 2,893 2,292 - - 25,850 24,031  Total net sales $ 333,715 $ 339,716 $ 261,928 $ 206,769 $ 59,742 $ 70,519 $ 655,385 $ 617,004  (1) Company sales based on geographic location are where the sale originates not where the customer is located.

Acquisition of Orlaco (Tables)

Acquisition of Orlaco (Tables)	9 Months Ended
	Sep. 30, 2018
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 
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, 2017. 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.    Nine months ended  September 30,  2017   Net sales $ 622,034  Net income attributable to Stoneridge, Inc. and subsidiaries $ 26,375 

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 30, 2018
Inventories [Abstract]
Schedule of Inventory, Current	Inventory cost includes material, labor and overhead. Inventories consisted of the following:    September 30, December 31,  2018 2017  Raw materials $ 58,341 $ 47,588  Work-in-progress 5,395 5,806  Finished goods 23,019 20,077  Total inventories, net $ 86,755 $ 73,471 

Financial Instruments and Fai_2

Financial Instruments and Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2018
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,  2018 2017 2018 2017 2018 2017  Derivatives designated as hedging instruments:  Cash flow hedges:  Forward currency contracts $ 7,112 $ 9,143 $ 665 $ - $ - $ 221  Derivatives not designated as hedging instruments:  Forward currency contracts $ 920 $ 1,486 $ 4 $ - $ - $ 48    (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 reclassified from  Gain recorded in other other comprehensive income  comprehensive income (loss) (loss) into net income (A)  2018 2017 2018 2017  Derivatives designated as cash flow hedges:  Forward currency contracts $ 637 $ 56 $ 558 $ 268    Gross amounts recorded for the cash flow hedges in ot her comprehensive income (loss) and in net income for the nine months ended September 30 are as follows:    Gain reclassified from  Gain recorded in other other comprehensive income  comprehensive income (loss) (loss) into net income (A)  2018 2017 2018 2017  Derivatives designated as cash flow hedges:  Forward currency contracts $ 1,819 $ 717 $ 933 $ 452  (A) Gains reclassified from other comprehensive income (loss) into net income recognized in cost of goods sold in the Company's condensed consolidated statements of operations were $495 and $834 for the three and nine months ended September 30, 2018, respectively. Gains reclassified from other comprehensive income (loss) into net income recognized in design and development (“D&D”) in the Company's condensed consolidated statements of operations were $63 and $99 for the three and nine months ended September 30, 2018, respectively. Gains reclassified from other comprehensive income (loss) were recognized in cost of goods sold for the three and nine months ended September 30, 2017.
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.     September 30, 2018 December 31, 2017  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 $ 669 $ - $ 669 $ - $ -  Total financial assets carried at fair value $ 669 $ - $ 669 $ - $ -   Financial liabilities carried at fair value:  Forward currency contracts $ - $ - $ - $ - $ 269  Earn-out consideration 20,002 - - 20,002 20,746  Total financial liabilities carried at fair value $ 20,002 $ - $ - $ 20,002 $ 21,015  
Summary of the Change in Fair Value of the Level 3 Financial Liabilities Related to Contingent Consideration	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, 2017 $ 8,637 $ 12,109 $ 20,746  Change in fair value 369 1,549 1,918  Foreign currency adjustments (300) (2,362) (2,662)  Balance at September 30, 2018 $ 8,706 $ 11,296 $ 20,002     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, 2018
Debt [Abstract]
Schedule of Debt	Debt consisted of the following at September 30, 2018 and December 31, 2017 :     September 30, December 31, Interest rates at  2018 2017 September 30, 2018 Maturity  Revolving Credit Facility  Credit Facility $ 101,000 $ 121,000 3.16% - 3.30% September 2021   Debt  PST short-term obligations 675 - 11.26% March 2019  PST long-term notes 2,351 8,016 8.0% - 10.0% 2019 -2021  Other - 28  Total debt 3,026 8,044  Less: current portion (1,808) (4,192)  Total long-term debt, net $ 1,218 $ 3,852  

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2018
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,  2018 2017 2018 2017  Basic weighted-average Common Shares outstanding 28,452,807 28,135,705 28,383,843 28,062,438  Effect of dilutive shares 612,239 516,637 689,257 550,188  Diluted weighted-average Common Shares outstanding 29,065,046 28,652,342 29,073,100 28,612,626  

Changes in Accumulated Other _2

Changes in Accumulated Other Comprehensive Loss by Component (Tables)	9 Months Ended
	Sep. 30, 2018
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 , 2018 and 2017 were as follows:     Foreign Unrealized  currency gain (loss)  translation on derivatives Total  Balance at July 1, 2018 $ (82,944) $ 493 $ (82,451)   Other comprehensive income (loss) before reclassifications (3,339) 258 (3,081)  Amounts reclassified from accumulated other  comprehensive loss - (226) (226)  Net other comprehensive income (loss), net of tax (3,339) 32 (3,307)  Balance at September 30, 2018 $ (86,283) $ 525 $ (85,758)   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)     Changes in accumulated other comprehensive loss for the nine months ended September 30 , 2018 and 2017 were as follows:     Foreign Unrealized  currency gain (loss)  translation on derivatives Total  Balance at January 1, 2018 $ (69,417) $ (143) $ (69,560)   Other comprehensive income (loss) before reclassifications (16,866) 1,372 (15,494)  Amounts reclassified from accumulated other  comprehensive loss - (704) (704)  Net other comprehensive income (loss), net of tax (16,866) 668 (16,198)  Balance at September 30, 2018 $ (86,283) $ 525 $ (85,758)   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) - (16,995)  Balance at September 30, 2017 $ (69,068) $ 154 $ (68,914)  

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2018
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 2018 2017  Product warranty and recall at beginning of period $ 9,978 $ 9,344  Accruals for products shipped during period 4,207 6,279  Assumed warranty liability related to Orlaco - 1,462  Aggregate changes in pre-existing liabilities due to claim developments 573 1,554  Settlements made during the period (4,259) (9,252)  Foreign currency translation (561) 381  Product warranty and recall at end of period $ 9,938 $ 9,768 

Business Realignment (Tables)

Business Realignment (Tables)	9 Months Ended
	Sep. 30, 2018
Business Realignment [Abstract]
Schedule of Restructuring and Related Costs	Business realignment c osts (benefit) by reportable segment were as follows:    Three months ended Nine months ended  September 30, September 30,  2018 2017 2018 2017  Control Devices (A) $ 32 $ - $ 160 $ -  Electronics (B) (80) 16 215 72  PST (C) 35 37 354 475  Total business realignment costs (benefit) $ (13) $ 53 $ 729 $ 547  (A) Severance costs for the nine months ended September 30 , 2018 related to D&D were $128 . Severance costs for the three and nine months ended September 30, 2018 related to SG&A were $32 .  (B) Severance costs (benefit) for the three and nine months ended September 30, 2018 related to SG&A were $(80) and $215 , respec tively . 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 .  (C) Severance costs for the three and nine months ended September 30, 2018 related to SG&A were $19 and $312 , respectively. Sev eranc e costs for the three and nine months ended September 30, 2018 related to COGS were $16 and $42 , respectively. 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 nine months ended September 30, 2017 related to COGS, SG&A and D&D were $355, $119 and $1 , respectively .
Schedule of Business Realignment Charges Classified by Statement of Operations	 Business realignment costs (benefit) classified by statement of operations line item were as follows:    Three months ended Nine months ended  September 30, September 30,  2018 2017 2018 2017  Cost of goods sold $ 16 $ 17 $ 42 $ 411  Selling, general and administrative (29) 35 559 135  Design and development - 1 128 1  Total business realignment charges (benefit) $ (13) $ 53 $ 729 $ 547 

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2018
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,  2018 2017 2018 2017  Net Sales:  Control Devices $ 108,402 $ 106,842 $ 333,715 $ 339,716  Inter-segment sales 1,556 1,118 6,218 3,269  Control Devices net sales 109,958 107,960 339,933 342,985  Electronics (D) 81,587 71,354 261,928 206,769  Inter-segment sales 9,067 8,959 29,310 30,538  Electronics net sales 90,654 80,313 291,238 237,307  PST 18,864 25,386 59,742 70,519  Inter-segment sales - 145 2 145  PST net sales 18,864 25,531 59,744 70,664   Eliminations (10,623) (10,222) (35,530) (33,952)  Total net sales $ 208,853 $ 203,582 $ 655,385 $ 617,004  Operating Income (Loss):  Control Devices $ 16,297 $ 16,249 $ 51,336 $ 55,257  Electronics (D) 8,951 4,896 25,107 13,267  PST 668 1,018 1,553 2,720  Unallocated Corporate (A) (7,604) (8,867) (23,656) (27,108)  Total operating income $ 18,312 $ 13,296 $ 54,340 $ 44,136  Depreciation and Amortization:  Control Devices $ 3,070 $ 2,664 $ 8,762 $ 8,050  Electronics (D) 2,213 2,136 6,756 5,947  PST 1,583 2,115 5,828 6,299  Unallocated Corporate 200 181 596 376  Total depreciation and amortization (B) $ 7,066 $ 7,096 $ 21,942 $ 20,672  Interest Expense, net:  Control Devices $ 19 $ 19 $ 56 $ 84  Electronics 32 24 89 68  PST 230 378 762 1,482  Unallocated Corporate 874 1,087 2,772 2,802  Total interest expense, net $ 1,155 $ 1,508 $ 3,679 $ 4,436  Capital Expenditures:  Control Devices $ 3,938 $ 5,523 $ 12,996 $ 13,318  Electronics (D) 725 2,417 4,892 6,451  PST 522 974 2,477 2,899  Unallocated Corporate (C) 786 811 2,451 2,224  Total capital expenditures $ 5,971 $ 9,725 $ 22,816 $ 24,892             September 30, December 31,  2018 2017  Total Assets:  Control Devices $ 183,221 $ 164,632  Electronics 265,908 252,324  PST 81,267 100,382  Corporate (C) 346,842 377,657  Eliminations (317,986) (335,958)  Total assets $ 559,252 $ 559,037    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,  2018 2017 2018 2017  Net Sales:  North America $ 119,475 $ 113,402 $ 364,789 $ 358,275  South America 18,864 25,386 59,742 70,519  Europe and Other (D) 70,514 64,794 230,854 188,210  Total net sales $ 208,853 $ 203,582 $ 655,385 $ 617,004      September 30, December 31,  2018 2017   Long-term Assets:  North America $ 86,895 $ 89,997  South America 44,728 58,989  Europe and Other 107,719 106,682  Total long-term assets $ 239,342 $ 255,668               (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. (D) The amount for the nine months ended September 30, 2017 includes eight months of activity from the acquisition date of January 31, 2017 related to Orlaco which is disclosed in Note 4
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,  2018 2017 2018 2017  Net Sales:  North America $ 119,475 $ 113,402 $ 364,789 $ 358,275  South America 18,864 25,386 59,742 70,519  Europe and Other (D) 70,514 64,794 230,854 188,210  Total net sales $ 208,853 $ 203,582 $ 655,385 $ 617,004      September 30, December 31,  2018 2017   Long-term Assets:  North America $ 86,895 $ 89,997  South America 44,728 58,989  Europe and Other 107,719 106,682  Total long-term assets $ 239,342 $ 255,668               (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. (D) The amount for the nine months ended September 30, 2017 includes eight months of activity from the acquisition date of January 31, 2017 related to Orlaco which is disclosed in Note 4

Investments (Tables)

Investments (Tables)	9 Months Ended
	Sep. 30, 2018
Investments [Abstract]
Schedule of Noncontrolling Interest	The following table sets forth a summary of the change in noncontrolling interest in 2017:     Three months ended Nine months ended  September 30, September 30,  2017 2017  Noncontrolling interest at beginning of period $ - $ 13,762  Net loss - (130)  Foreign currency translation - 826  Comprehensive income - 696  Acquisition of noncontrolling interest - (14,458)  Noncontrolling interest at end of period $ - $ -  

Basis of Presentation (Narrativ

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

Revenue (Narrative) (Details)

Revenue (Narrative) (Details) $ in Thousands	Sep. 30, 2018USD ($)
Revenue [Abstract]
Contract assets	$ 0
Contract liabilities	0
Capitalized contract acquisition costs	$ 0

Revenue (Revenue by Segment and

Revenue (Revenue by Segment and Geographical Location) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Total net sales	$ 208,853	$ 203,582	$ 655,385	$ 617,004
North America [Member]
Disaggregation of Revenue [Line Items]
Total net sales	119,475	113,402	364,789	358,275
South America [Member]
Disaggregation of Revenue [Line Items]
Total net sales	18,864	25,386	59,742	70,519
Europe [Member]
Disaggregation of Revenue [Line Items]
Total net sales	62,489	55,199	205,004	164,179
Asia Pacific [Member]
Disaggregation of Revenue [Line Items]
Total net sales	8,025	9,595	25,850	24,031
Control Devices [Member]
Disaggregation of Revenue [Line Items]
Total net sales	108,402	106,842	333,715	339,716
Control Devices [Member] | North America [Member]
Disaggregation of Revenue [Line Items]
Total net sales	97,017	96,314	300,024	312,320
Control Devices [Member] | Europe [Member]
Disaggregation of Revenue [Line Items]
Total net sales	4,174	2,009	10,734	5,657
Control Devices [Member] | Asia Pacific [Member]
Disaggregation of Revenue [Line Items]
Total net sales	7,211	8,519	22,957	21,739
Electronics [Member]
Disaggregation of Revenue [Line Items]
Total net sales	81,587	71,354	261,928	206,769
Electronics [Member] | North America [Member]
Disaggregation of Revenue [Line Items]
Total net sales	22,458	17,088	64,765	45,955
Electronics [Member] | Europe [Member]
Disaggregation of Revenue [Line Items]
Total net sales	58,315	53,190	194,270	158,522
Electronics [Member] | Asia Pacific [Member]
Disaggregation of Revenue [Line Items]
Total net sales	814	1,076	2,893	2,292
PST [Member]
Disaggregation of Revenue [Line Items]
Total net sales	18,864	25,386	59,742	70,519
PST [Member] | South America [Member]
Disaggregation of Revenue [Line Items]
Total net sales	$ 18,864	$ 25,386	$ 59,742	$ 70,519

Acquisition of Orlaco (Narrativ

Acquisition of Orlaco (Narrative) (Details) - Orlaco [Member] € in Thousands	1 Months Ended		3 Months Ended		9 Months Ended
	Jan. 31, 2017EUR (€)	Jan. 31, 2017USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2018EUR (€)	Sep. 30, 2018USD ($)
Business Acquisition [Line Items]
Acquisition agreement date					Jan. 31, 2017
Total cash paid at closing	€ 74,939	$ 79,675,000
Acquisition related costs					$ 0	$ 1,259,000
Expense related to fair value adjustment for earn-out consideration			$ 0	$ 1,823,000	$ 369,000	3,926,000
Earnout Consideration [Member]
Business Acquisition [Line Items]
Maximum additional earnout consideration							€ 7,500	$ 8,706,000
Fair Value Adjustment to Inventory [Member]
Business Acquisition [Line Items]
Expense related to inventory fair value step up				$ 0		$ 1,636,000

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	€ 74,939	$ 79,675
Fair value of earn-out liability and other adjustments		4,208
Total purchase price		$ 83,883

Acquisition of Orlaco (Pro Form

Acquisition of Orlaco (Pro Forma Results of Operations) (Details) - Orlaco [Member] $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)
Business Acquisition [Line Items]
Net sales	$ 622,034
Net income attributable to Stoneridge, Inc. and subsidiaries	$ 26,375

Inventories (Narrative) (Detail

Inventories (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Inventories [Abstract]
Inventory amount, FIFO	$ 69,817	$ 54,837
Inventory amount, weighted average cost	$ 16,938	$ 18,634

Inventories (Schedule of Invent

Inventories (Schedule of Inventories) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Inventories [Abstract]
Raw materials	$ 58,341	$ 47,588
Work-in-progress	5,395	5,806
Finished goods	23,019	20,077
Total inventories, net	$ 86,755	$ 73,471

Financial Instruments and Fai_3

Financial Instruments and Fair Value Measurements (Narrative) (Details) € in Thousands, $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2018USD ($)		Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)		Sep. 30, 2017USD ($)	Mar. 31, 2018EUR (€)	Dec. 31, 2017USD ($)
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Other Liabilities, Fair Value Disclosure	$ 20,002			$ 20,002				$ 20,746
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	10		$ (36)	52		$ (164)
Cash Flow Hedging [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
(Gain) loss from cash flow hedge derivatives to be reclassified	(665)			(665)
Cash Flow Hedging [Member] | U.S. Dollar Denominated Foreign Currency Forward Contracts, Swedish Krona Functional Currency [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Notional amounts	2,000			2,000				0
Cash Flow Hedging [Member] | U.S. Dollar Denominated Foreign Currency Forward Contracts Euro Functional Currency [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Notional amounts	500			500				0
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	7,112	[1]		7,112	[1]			9,143
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	4,612			4,612				9,143
Not Designated as Hedging Instrument [Member] | Forward Currency Contracts [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Notional amounts	$ 920	[1]		$ 920	[1]			$ 1,486
Orlaco [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Other Liabilities, Fair Value Disclosure | €							€ 7,500
[1]	Notional amounts represent the gross contract of the derivatives outstanding in U.S. dollars.

Financial Instruments and Fai_4

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, 2018		Dec. 31, 2017
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional amounts	$ 920	[1]	$ 1,486
Cash flow hedges , other derivative assets	4
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional amounts	7,112	[1]	9,143
Cash flow hedges , other derivative assets	665		0
Other Liabilities [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Fair value of other derivatives	0		(48)
Other Liabilities [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Cash flow hedges , prepaid expense and other current assets	$ 0		$ (221)
[1]	Notional amounts represent the gross contract of the derivatives outstanding in U.S. dollars.

Financial Instruments and Fai_5

Financial Instruments and Fair Value Measurements (Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Designated as Hedging Instrument [Member] | Forward Currency Contracts [Member]
Derivatives designated as cash flow hedges:
Gain recorded in other comprehensive income (loss)		$ 637	$ 56	$ 1,819	$ 717
Gain reclassified from other comprehensive income (loss) into net income	[1]	558		933
Cost of Goods Sold [Member]
Derivatives designated as cash flow hedges:
Gain reclassified from other comprehensive income (loss) into net income		495		834
Cost of Goods Sold [Member] | Designated as Hedging Instrument [Member] | Forward Currency Contracts [Member]
Derivatives designated as cash flow hedges:
Gain reclassified from other comprehensive income (loss) into net income	[1]		$ 268		$ 452
Design and Development Expense [Member]
Derivatives designated as cash flow hedges:
Gain reclassified from other comprehensive income (loss) into net income		$ 63		$ 99
[1]	Gains reclassified from other comprehensive income (loss) into net income recognized in cost of goods sold in the Company's condensed consolidated statements of operations were $495 and $834 for the three and nine months ended September 30, 2018, respectively. Gains reclassified from other comprehensive income (loss) into net income recognized in design and development (“D&D”) in the Company's condensed consolidated statements of operations were $63 and $99 for the three and nine months ended September 30, 2018, respectively. Gains reclassified from other comprehensive income (loss) were recognized in cost of goods sold for the three and nine months ended September 30, 2017.

Financial Instruments and Fai_6

Financial Instruments and Fair Value Measurements (Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financial assets carried at fair value:
Forward currency asset contracts	$ 669
Total financial assets carried at fair value	669
Financial liabilities carried at fair value:
Forward currency liabilities contracts		$ 269
Earn-out consideration	20,002	20,746
Total financial liabilities carried at fair value	20,002	$ 21,015
Fair Value, Inputs, Level 2 [Member]
Financial assets carried at fair value:
Forward currency asset contracts	669
Total financial assets carried at fair value	669
Fair Value, Inputs, Level 3 [Member]
Financial liabilities carried at fair value:
Earn-out consideration	20,002
Total financial liabilities carried at fair value	$ 20,002

Financial Instruments and Fai_7

Financial Instruments and Fair Value Measuements (Summary of the Change in Fair Value of the Level 3 Financial Liabilities Related to Contingent Consideration) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial liability, Beginning balance	$ 20,746	$ 0
Fair value on acquisition date		13,423
Change in fair value	1,918	4,645
Foreign currency adjustments	(2,662)	227
Financial liability, Ending balance	20,002	18,295
Orlaco [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial liability, Beginning balance	8,637	0
Fair value on acquisition date		3,243
Change in fair value	369	3,926
Foreign currency adjustments	(300)	408
Financial liability, Ending balance	8,706	7,577
PST Eletronica Ltda [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial liability, Beginning balance	12,109	0
Fair value on acquisition date		10,180
Change in fair value	1,549	719
Foreign currency adjustments	(2,362)	(181)
Financial liability, Ending balance	$ 11,296	$ 10,718

Share-Based Compensation (Narra

Share-Based Compensation (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Selling, General and Administrative Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 1,376	$ 1,648	$ 4,214	$ 5,713

Debt (Narrative) (Details)

Debt (Narrative) (Details) kr in Thousands, $ in Thousands

Aug. 11, 2016

Aug. 31, 2016USD ($)

Sep. 30, 2018SEK (kr)

Oct. 26, 2018USD ($)

Sep. 30, 2018USD ($)

Sep. 11, 2018USD ($)

Dec. 31, 2017SEK (kr)

Dec. 31, 2017USD ($)

Jan. 30, 2017USD ($)

Dec. 31, 2016USD ($)

Aug. 12, 2016USD ($)

Mar. 25, 2015

Sep. 12, 2014USD ($)

Nov. 02, 2007USD ($)

Debt Instrument [Line Items]

Borrowings outstanding

$ 101,000

$ 121,000

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

$ 101,000

121,000

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

$ 2,008

2,008

Credit Facility [Member]

Debt Instrument [Line Items]

Credit Facility covenant compliance

The Company was in compliance with all Credit Facility covenants at September 30, 2018 and December 31, 2017

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

Amendment Five [Member] | Revolving Credit Facility [Member] | Maximum [Member]

Debt Instrument [Line Items]

Credit facility, capacity restrictions of investment activities

$ 10,000

PST Debt [Member]

Debt Instrument [Line Items]

Notes covenant compliance

PST was in compliance with all debt covenants at September 30, 2018 and December 31, 2017.

PST Eletronica Ltda [Member] | Term Loan [Member]

Debt Instrument [Line Items]

October 2018 through September 2019

1,808

October 2019 through December 2019

330

2,020

465

2,021

$ 423

PST Eletronica Ltda [Member] | PST Long-Term Notes [Member]

Debt Instrument [Line Items]

Long-term debt, weighted average interest rate

8.65%

8.65%

PST Eletronica Ltda [Member] | PST Short-Term Notes [Member]

Debt Instrument [Line Items]

Short-term debt, weighted average interest rate

11.26%

11.26%

Subsequent Event [Member] | Amendment Six [Member] | Revolving Credit Facility [Member]

Debt Instrument [Line Items]

Maximum value of common shares allowed to be repurchased

$ 50,000

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

kr 20,000

$ 2,250

kr 20,000

2,439

Borrowings outstanding

$ 0

$ 0

Debt (Schedule of Debt) (Detail

Debt (Schedule of Debt) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Revolving credit facility	$ 101,000	$ 121,000
Debt:
Total debt	3,026	8,044
Less: current portion	(1,808)	(4,192)
Total long-term debt, net	1,218	3,852
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility	$ 101,000	121,000
Debt:
Debt, maturity	September 2,021
Maximum [Member] | Revolving Credit Facility [Member]
Debt:
Interest rate	3.30%
Minimum [Member] | Revolving Credit Facility [Member]
Debt:
Interest rate	3.16%
PST Short-Term Notes [Member]
Debt Instrument [Line Items]
Short-term debt	$ 675
Debt:
Debt, maturity	March 2,019
Interest rate	11.26%
PST Long-Term Notes [Member]
Debt:
Total long-term debt, net	$ 2,351	8,016
Debt maturity period range start	2,019
Debt maturity period range end	2,021
PST Long-Term Notes [Member] | Maximum [Member]
Debt:
Interest rate	10.00%
PST Long-Term Notes [Member] | Minimum [Member]
Debt:
Interest rate	8.00%
Other [Member]
Debt:
Total debt	$ 0	$ 28

Earnings Per Share (Narative) (

Earnings Per Share (Narative) (Details) - shares	Sep. 30, 2018	Sep. 30, 2017
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	626,500	781,977

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, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Basic weighted-average common shares outstanding	28,452,807	28,135,705	28,383,843	28,062,438
Effect of dilutive shares	612,239	516,637	689,257	550,188
Diluted weighted-average common shares outstanding	29,065,046	28,652,342	29,073,100	28,612,626

Changes in Accumulated Other _3

Changes in Accumulated Other Comprehensive Loss by Component (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Changes in Accumulated Other Comprehensive Loss by Component [Abstract]
Foreign currency translation, Beginning balance		$ (82,944)	$ (75,551)	$ (69,417)	$ (67,895)
Foreign currency translation, Other comprehensive income (loss) before reclassifications		(3,339)	6,483	(16,866)	15,822
Foreign currency translation, Net other comprehensive income (loss), net of tax		(3,339)	6,483	(16,866)	15,822
Foreign currency translation, Reclassification of foreign currency translation associated with noncontrolling interest acquired					(16,995)
Foreign currency translation, Ending balance		(86,283)	(69,068)	(86,283)	(69,068)
Unrealized gain (loss) on hedging activities, Beginning balance		493	292	(143)	(18)
Unrealized gain (loss) on hedging activities, Other comprehensive income (loss) before reclassifications		258	36	1,372	466
Unrealized gain (loss) on hedging activities, Amounts reclassified from accumulated other comprehensive loss		(226)	(174)	(704)	(294)
Unrealized gain (loss) on hedging activities, Net other comprehensive income (loss), net of tax	[1]	32	(138)	668	172
Unrealized gain (loss) on hedging activities, Ending balance		525	154	525	154
Total, Other comprehensive income (loss) before reclassifications		(3,081)	6,519	(15,494)	16,288
Total, Amounts reclassified from accumulated other comprehensive loss		(226)	(174)	(704)	(294)
Net other comprehensive income (loss), net of tax		(3,307)	6,345	(16,198)	15,994
Accumulated other comprehensive income (loss), net of tax, total		$ (85,758)	$ (68,914)	$ (85,758)	$ (68,914)	$ (82,451)	$ (69,560)	$ (75,259)	$ (67,913)
[1]	Net of tax expense (benefit) of $47 and $(74) for the three months ended September 30, 2018 and 2017, respectively. Net of tax expense of $218 and $93 for the nine months ended September 30, 2018 and 2017, respectively.

Commitments and Contingencies_2

Commitments and Contingencies (Narrative) (Details) R$ in Thousands, $ in Thousands	9 Months Ended		15 Months Ended
	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2018BRL (R$)	Sep. 30, 2018USD ($)	Dec. 31, 2017BRL (R$)	Dec. 31, 2017USD ($)
Short-term Debt [Line Items]
Environmental remediation accrued undiscounted liability					$ 155		$ 265
Loss recoveries and insurance gain contingencies							1,644
Cash proceeds related to damaged inventory and incremental costs	$ 241	$ 500
Cash proceeds within cash flows from investing activities	$ 1,403		$ 0
Product warranty and recall accrual					3,273		3,112
Accrued Expenses and Other Current Liabilities [Member]
Short-term Debt [Line Items]
Environmental remediation accrued undiscounted liability					155		253
Letter of Credit [Member]
Short-term Debt [Line Items]
Line of credit					1,489
PST Eletronica Ltda [Member] | Civil, labor and other tax contingencies [Member]
Short-term Debt [Line Items]
Loss contingency, estimate of possible loss				R$ 30100	$ 7,400	R$ 33800	$ 10,200

Commitments and Contingencies_3

Commitments and Contingencies (Reconciliation of Changes in Product Warranty and Recall Liability) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Commitments and Contingencies [Abstract]
Product warranty and recall at beginning of period	$ 9,978	$ 9,344
Accruals for products shipped during period	4,207	6,279
Acquired warranty liability related to acquisition		1,462
Aggregate changes in pre-existing liabilities due to claim developments	573	1,554
Settlements made during the period	(4,259)	(9,252)
Foreign currency translation	(561)	381
Product warranty and recall at end of period	$ 9,938	$ 9,768

Business Realignment (Schedule

Business Realignment (Schedule of Restructuring and Related Costs) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Restructuring Cost and Reserve [Line Items]
Total business realignment costs (benefit)		$ (13)	$ 53	$ 729	$ 547
Cost of Goods Sold [Member]
Restructuring Cost and Reserve [Line Items]
Total business realignment costs (benefit)		16	17	42	411
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Total business realignment costs (benefit)		(29)	35	559	135
Design and Development Expense [Member]
Restructuring Cost and Reserve [Line Items]
Total business realignment costs (benefit)			1	128	1
Control Devices [Member]
Restructuring Cost and Reserve [Line Items]
Total business realignment costs (benefit)	[1]	32		160
Control Devices [Member] | Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs		32		32
Control Devices [Member] | Design and Development Expense [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs				128
Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Total business realignment costs (benefit)	[2]	(80)	16	215	72
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		(80)	16	215	16
PST Segment [Member]
Restructuring Cost and Reserve [Line Items]
Total business realignment costs (benefit)	[3]	35	37	354	475
PST Segment [Member] | Cost of Goods Sold [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs		16	17	42	355
PST Segment [Member] | Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs		$ 19	19	$ 312	119
PST Segment [Member] | Design and Development Expense [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs			$ 1		$ 1
[1]	Severance costs for the nine months ended September 30, 2018 related to D&D were $128. Severance costs for the three and nine months ended September 30, 2018 related to SG&A were $32
[2]	Severance costs (benefit) for the three and nine months ended September 30, 2018 related to SG&A were $(80) and $215, respectively. 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
[3]	Severance costs for the three and nine months ended September 30, 2018 related to SG&A were $19 and $312, respectively. Severance costs for the three and nine months ended September 30, 2018 related to COGS were $16 and $42, respectively. 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 nine months ended September 30, 2017 related to COGS, SG&A and D&D were $355, $119 and $1, respectively

Business Realignment (Schedul_2

Business Realignment (Schedule of Business Realignment Charges Classified by Statement of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Restructuring Cost and Reserve [Line Items]
Total business realignment costs (benefit)	$ (13)	$ 53	$ 729	$ 547
Cost of Goods Sold [Member]
Restructuring Cost and Reserve [Line Items]
Total business realignment costs (benefit)	16	17	42	411
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Total business realignment costs (benefit)	$ (29)	35	559	135
Design and Development Expense [Member]
Restructuring Cost and Reserve [Line Items]
Total business realignment costs (benefit)		$ 1	$ 128	$ 1

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Taxes [Abstract]
Provision for income taxes	$ 3,467	$ 3,809	$ 10,520	$ 13,569
Effective income tax rate	20.70%	32.10%	20.10%	34.20%

Segment Reporting (Narrative) (

Segment Reporting (Narrative) (Details)	9 Months Ended
	Sep. 30, 2018segment
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, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Net Sales:
Total net sales		$ 208,853	$ 203,582	$ 655,385	$ 617,004
Operating Income (Loss)
Total operating income (loss)		18,312	13,296	54,340	44,136
Total income before income taxes		16,759	11,858	52,312	39,710
Depreciation and Amortization:
Total depreciation and amortization		7,066	7,096	21,942	20,672
Interest Expense, net:
Interest expense, net		1,155	1,508	3,679	4,436
Capital Expenditures:
Capital expenditures		5,971	9,725	22,816	24,892
Total Assets:
Total assets		559,252		559,252		$ 559,037
Total long-term assets		239,342		239,342		255,668
Intersegment Eliminations [Member]
Net Sales:
Total net sales		(10,623)	(10,222)	(35,530)	(33,952)
Total Assets:
Total assets		(317,986)		(317,986)		(335,958)
Control Devices [Member]
Net Sales:
Total net sales		109,958	107,960	339,933	342,985
Operating Income (Loss)
Total operating income (loss)		16,297	16,249	51,336	55,257
Depreciation and Amortization:
Total depreciation and amortization		3,070	2,664	8,762	8,050
Interest Expense, net:
Interest expense, net		19	19	56	84
Capital Expenditures:
Capital expenditures		3,938	5,523	12,996	13,318
Control Devices [Member] | Operating Segments [Member]
Net Sales:
Total net sales		108,402	106,842	333,715	339,716
Total Assets:
Total assets		183,221		183,221		164,632
Control Devices [Member] | Intersegment Eliminations [Member]
Net Sales:
Total net sales		1,556	1,118	6,218	3,269
Electronics [Member]
Net Sales:
Total net sales		90,654	80,313	291,238	237,307
Operating Income (Loss)
Total operating income (loss)		8,951	4,896	25,107	13,267
Depreciation and Amortization:
Total depreciation and amortization		2,213	2,136	6,756	5,947
Interest Expense, net:
Interest expense, net		32	24	89	68
Capital Expenditures:
Capital expenditures		725	2,417	4,892	6,451
Electronics [Member] | Operating Segments [Member]
Net Sales:
Total net sales		81,587	71,354	261,928	206,769
Total Assets:
Total assets		265,908		265,908		252,324
Electronics [Member] | Intersegment Eliminations [Member]
Net Sales:
Total net sales		9,067	8,959	29,310	30,538
PST [Member]
Net Sales:
Total net sales		18,864	25,531	59,744	70,664
Operating Income (Loss)
Total operating income (loss)		668	1,018	1,553	2,720
Depreciation and Amortization:
Total depreciation and amortization		1,583	2,115	5,828	6,299
Interest Expense, net:
Interest expense, net		230	378	762	1,482
Capital Expenditures:
Capital expenditures		522	974	2,477	2,899
PST [Member] | Operating Segments [Member]
Net Sales:
Total net sales		18,864	25,386	59,742	70,519
Total Assets:
Total assets		81,267		81,267		100,382
PST [Member] | Intersegment Eliminations [Member]
Net Sales:
Total net sales			145	2	145
Corporate [Member]
Operating Income (Loss)
Total operating income (loss)		(7,604)	(8,867)	(23,656)	(27,108)
Depreciation and Amortization:
Total depreciation and amortization		200	181	596	376
Interest Expense, net:
Interest expense, net		874	1,087	2,772	2,802
Capital Expenditures:
Capital expenditures		786	811	2,451	2,224
Total Assets:
Total assets	[1]	346,842		346,842		377,657
North America [Member]
Net Sales:
Total net sales		119,475	113,402	364,789	358,275
Total Assets:
Total long-term assets		86,895		86,895		89,997
South America [Member]
Net Sales:
Total net sales		18,864	25,386	59,742	70,519
Total Assets:
Total long-term assets		44,728		44,728		58,989
Europe and Other [Member]
Net Sales:
Total net sales	[2]	70,514	$ 64,794	230,854	$ 188,210
Total Assets:
Total long-term assets		$ 107,719		$ 107,719		$ 106,682
[1]	Assets located at Corporate consist primarily of cash, intercompany loan receivables, fixed assets for the corporate headquarter building, equity investments and investments in subsidiaries.
[2]	The amount for the nine months ended September 30, 2017 includes eight months of activity from the acquisition date of January 31, 2017 related to Orlaco which is disclosed in Note 4

Segment Reporting (Schedule o_2

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, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Net Sales:
Total net sales		$ 208,853	$ 203,582	$ 655,385	$ 617,004
Long-term Assets:
Total long-term assets		239,342		239,342		$ 255,668
North America [Member]
Net Sales:
Total net sales		119,475	113,402	364,789	358,275
Long-term Assets:
Total long-term assets		86,895		86,895		89,997
South America [Member]
Net Sales:
Total net sales		18,864	25,386	59,742	70,519
Long-term Assets:
Total long-term assets		44,728		44,728		58,989
Europe and Other [Member]
Net Sales:
Total net sales	[1]	70,514	$ 64,794	230,854	$ 188,210
Long-term Assets:
Total long-term assets		$ 107,719		$ 107,719		$ 106,682
[1]	The amount for the nine months ended September 30, 2017 includes eight months of activity from the acquisition date of January 31, 2017 related to Orlaco which is disclosed in Note 4

Investments (Narrative) (Detail

Investments (Narrative) (Details) R$ in Thousands, $ in Thousands	May 16, 2017USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	May 15, 2017	Sep. 30, 2018BRL (R$)	Sep. 30, 2018USD ($)	Dec. 31, 2017BRL (R$)	Dec. 31, 2017USD ($)	Jun. 30, 2017USD ($)	Dec. 31, 2016USD ($)
Schedule of Equity Method Investments [Line Items]
Income (loss) from equity method investments		$ 249	$ 465	$ 1,435	$ 1,200
PST Eletronica Ltda [Member]
Schedule of Equity Method Investments [Line Items]
Percentage ownership in consolidated subsidiary						74.00%
Percentage of additional noncontrolling interest acquired	26.00%
Noncontrolling interest	$ 14,458		0		0							$ 13,762
Dividends payable, price index adjustment							R$ 766	$ 189
PST Eletronica Ltda [Member] | Noncontrolling Interest [Member]
Schedule of Equity Method Investments [Line Items]
Cash payment at closing	1,500
Fair value of earn-out liability	10,180
Carrying value of investment	31,453
Carrying value of foreign currency translation	$ (16,995)
Dividends payable							R$ 23096	$ 5,706	R$ 22330	$ 6,742
Minda Stoneridge Instruments Ltd [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage							49.00%	49.00%
Equity method investments								$ 10,218		$ 10,131
Income (loss) from equity method investments		249	465	1,435	1,200
Earnout Consideration [Member] | PST Eletronica Ltda [Member]
Schedule of Equity Method Investments [Line Items]
Expense related to fair value adjustment for earn-out consideration		$ 501	$ 475	$ 1,549	$ 719

Investments (Schedule of Noncon

Investments (Schedule of Noncontrolling Interest) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017
Net loss attributable to noncontrolling interest		$ (130)
PST Eletronica Ltda [Member]
Noncontrolling interest at beginning of period		13,762
Net loss attributable to noncontrolling interest		(130)
Foreign currency translation		826
Comprehensive income (loss) related to noncontrolling interest		696
Acquisition of noncontrolling interest		(14,458)
Noncontrolling interest at end of period	$ 0	$ 0