Stoneridge (SRI) 10-K 2 Mar 17 2016 FY Annual report Financial data

DOCUMENT AND ENTITY INFORMATION

DOCUMENT AND ENTITY INFORMATION - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Feb. 24, 2017	Jun. 30, 2016
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		27,870,944
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2016
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2,016
Entity Well-Known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 395.7

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 50,389	$ 54,361
Accounts receivable, less reserves of $1,630 and $1,066, respectively	113,225	94,937
Inventories, net	60,117	61,009
Prepaid expenses and other current assets	17,162	21,602
Total current assets	240,893	231,909
Long-term assets:
Property, plant and equipment, net	91,500	85,264
Intangible assets, net and goodwill	40,191	36,699
Investments and other long-term assets, net	21,945	10,380
Total long-term assets	153,636	132,343
Total assets	394,529	364,252
Current liabilities:
Current portion of debt	8,626	13,905
Accounts payable	62,594	55,225
Accrued expenses and other current liabilities	41,489	38,920
Total current liabilities	112,709	108,050
Long-term liabilities:
Revolving credit facility	67,000	100,000
Long-term debt, net	8,060	4,458
Deferred income taxes	9,760	41,332
Other long-term liabilities	4,923	3,983
Total long-term liabilities	89,743	149,773
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 28,907 shares issued and 27,850 and 27,912 shares outstanding at December 31, 2016 and 2015, respectively, with no stated value
Additional paid-in capital	206,504	199,254
Common Shares held in treasury, 1,116 and 995 shares at December 31, 2016 and 2015, respectively, at cost	(5,632)	(4,208)
Retained earnings (accumulated deficit)	45,356	(32,105)
Accumulated other comprehensive loss	(67,913)	(69,822)
Total Stoneridge Inc. shareholders' equity	178,315	93,119
Noncontrolling interest	13,762	13,310
Total shareholders' equity	192,077	106,429
Total liabilities and shareholders' equity	$ 394,529	$ 364,252

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Statement Of Financial Position [Abstract]
Accounts receivable, reserves (in dollars)	$ 1,630	$ 1,066
Preferred shares, no par value	$ 0	$ 0
Preferred shares, authorized	5,000,000	5,000,000
Preferred shares, issued	0	0
Common shares, no par value	$ 0	$ 0
Common shares, authorized	60,000,000	60,000,000
Common shares, issued	28,966,000	28,907,000
Common shares, outstanding	27,850,000	27,912,000
Common shares held in treasury, shares	1,116,000	995,000

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2016		Sep. 30, 2016		Jun. 30, 2016		Mar. 31, 2016		Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Net sales	$ 172,612		$ 173,846		$ 186,903		$ 162,616		$ 154,641		$ 162,057		$ 165,289		$ 162,825		$ 695,977	$ 644,812	$ 660,579
Costs and expenses:
Cost of goods sold																	500,538	467,834	469,705
Selling, general and administrative																	111,145	110,371	123,630
Design and development																	40,212	38,792	41,609
Goodwill impairment charge (benefit)																			51,458
Operating income (loss)	10,170		11,780		13,626		8,506		8,327		8,947		7,415		3,126		44,082	27,815	(25,823)
Interest expense, net																	6,277	6,365	16,880
Equity in earnings of investee																	(1,233)	(608)	(815)
Loss on early extinguishment of debt																			10,607
Other expense (income), net																	(147)	1,828	565
Income (loss) before income taxes from continuing operations																	39,185	20,230	(53,060)
Provision (benefit) for income taxes from continuing operations	(39,503)	[1]	919	[1]	1,350	[1]	845	[1]	(345)		32		(381)		147		(36,389)	(547)	(1,856)
Income (loss) from continuing operations	48,489		9,981		10,995		6,109		4,935		7,411		6,328		2,103		75,574	20,777	(51,204)
Discontinued operations:
Income (loss) from discontinued operations, net of tax																			(811)
Loss on disposal, net of tax									16		(113)		55		(168)			(210)	(8,576)
Income (loss) from discontinued operations									16	[2]	(113)	[2]	55	[2]	(168)	[2]		(210)	(9,387)
Net income (loss)	48,489		9,981		10,995		6,109		4,951		7,298		6,383		1,935		75,574	20,567	(60,591)
Net income (loss) attributable to noncontrolling interest	122		(303)		(576)		(1,130)		(1,133)		(69)		(596)		(409)		(1,887)	(2,207)	(13,483)
Net income (loss) attributable to Stoneridge, Inc.	$ 48,367		$ 10,284		$ 11,571		$ 7,239		$ 6,084		$ 7,367		$ 6,979		$ 2,344		$ 77,461	$ 22,774	$ (47,108)
Earnings (loss) per share attributable to continuing operations attributable to Stoneridge, Inc.:
Basic (in dollars per share)	$ 1.74	[3]	$ 0.37	[3]	$ 0.42	[3]	$ 0.26	[3]	$ 0.22	[3]	$ 0.27	[3]	$ 0.26	[3]	$ 0.10	[3]	$ 2.79	$ 0.84	$ (1.40)
Diluted (in dollars per share)	1.70	[3]	0.36	[3]	0.41	[3]	0.26	[3]	0.22	[3]	0.27	[3]	0.25	[3]	0.09	[3]	2.74	0.82	(1.40)
Earnings (loss) per share attributable to discontinued operations:
Basic (in dollars per share)									0	[3]	(0.01)	[3]	0	[3]	(0.01)	[3]	0	(0.01)	(0.35)
Diluted (in dollars per share)									0	[3]	(0.01)	[3]	0	[3]	(0.01)	[3]	0	(0.01)	(0.35)
Earnings (loss) per share attributable to Stoneridge, Inc.:
Basic (in dollars per share)	1.74	[3]	0.37	[3]	0.42	[3]	0.26	[3]	0.22	[3]	0.26	[3]	0.26	[3]	0.09	[3]	2.79	0.83	(1.75)
Diluted (in dollars per share)	$ 1.70	[3]	$ 0.36	[3]	$ 0.41	[3]	$ 0.26	[3]	$ 0.22	[3]	$ 0.26	[3]	$ 0.25	[3]	$ 0.08	[3]	$ 2.74	$ 0.81	$ (1.75)
Weighted average shares outstanding:
Basic (in shares)																	27,763,990	27,337,954	26,923,809
Diluted (in shares)																	28,308,922	27,959,162	26,923,809
[1]	The Company recorded the release of a valuation allowance associated with its U.S. federal, certain state and foreign deferred tax assets for the year ended December 31, 2016.
[2]	A gain (loss) on disposal of the Wiring business was recorded for the quarters ended March 31, 2015, June 30, 2015, September 30, 2015 and December 31, 2015 for $(168), $55, $(113) and $16, respectively
[3]	Earnings per share for the year may not equal the sum of the four historical quarters earnings per share due to changes in weighted-average basic and diluted shares outstanding.

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement Of Other Comprehensive Income [Abstract]
Net income (loss)	$ 75,574	$ 20,567	$ (60,591)
Less: income (loss) attributable to noncontrolling interest	(1,887)	(2,207)	(13,483)
Net income (loss) attributable to Stoneridge, Inc.	77,461	22,774	(47,108)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	2,401	(24,693)	(15,268)
Benefit plan liability	(84)	(45)	141
Unrealized gain (loss) on derivatives, net	(408)	389	112
Other comprehensive income (loss), net of tax attributable to Stoneridge, Inc.	1,909	(24,349)	(15,015)
Comprehensive income (loss) attributable to Stoneridge, Inc.	$ 79,370	$ (1,575)	$ (62,123)

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
OPERATING ACTIVITIES:
Net income (loss)	$ 75,574	$ 20,567	$ (60,591)
Adjustments to reconcile net income (loss) to net cash provided by (used for) operating activities:
Depreciation	19,998	18,964	24,372
Amortization, including accretion of deferred financing costs	3,615	3,833	5,709
Deferred income taxes	(38,747)	(2,165)	(3,238)
Earnings of equity method investee	(1,233)	(608)	(815)
Loss on sale of fixed assets	48	74	110
Share-based compensation expense	6,134	7,224	5,406
Tax benefits related to share-based compensation expense	(977)
Goodwill impairment charge (benefit)			51,458
Loss on disposal of business		210	8,576
Loss on early extinguishment of debt			10,607
Changes in operating assets and liabilities
Accounts receivable, net	(18,694)	(489)	(19,400)
Inventories, net	4,519	(4,340)	3,161
Prepaid expenses and other assets	2,652	(295)	(1,306)
Accounts payable	10,980	6,577	524
Accrued expenses and other liabilities	1,408	5,253	(4,758)
Net cash provided by operating activities	65,277	54,805	19,815
INVESTING ACTIVITIES:
Capital expenditures	(24,476)	(28,735)	(24,754)
Proceeds from sale of fixed assets	652	64	110
Payments related to sale of business		(1,230)
Proceeds from sale of business			71,386
Business acquisition		(469)	(1,022)
Net cash provided by (used for) investing activities	(23,824)	(30,370)	45,720
FINANCING ACTIVITIES:
Revolving credit facility borrowings			100,000
Revolving credit facility payments	(33,000)
Extinguishment of senior notes			(175,000)
Premium related to early extinguishment of senior notes			(8,006)
Proceeds from issuance of other debt	16,223	22,540	30,072
Repayments of debt	(25,748)	(30,586)	(25,610)
Noncontrolling interest shareholder distribution			(1,083)
Other financing costs	(399)	(49)	(1,666)
Repurchase of Common Shares to satisfy employee tax withholding	(1,424)	(2,924)	(765)
Tax benefits related to share-based compensation expense	977
Net cash used for financing activities	(43,371)	(11,019)	(82,058)
Effect of exchange rate changes on cash and cash equivalents	(2,054)	(2,076)	(3,281)
Net change in cash and cash equivalents	(3,972)	11,340	(19,804)
Cash and cash equivalents at beginning of period	54,361	43,021	62,825
Cash and cash equivalents at end of period	50,389	54,361	43,021
Supplemental disclosure of cash flow information:
Cash paid for interest	5,786	6,092	20,464
Cash paid for income taxes, net	3,386	2,494	3,054
Supplemental disclosure of non-cash operating and financing activities:
Change in fair value of interest rate swap			(793)
Bank payment of vendor payables under short-term debt obligations	$ 3,764	$ 5,323	$ 4,758

CONSOLIDATED STATEMENTS OF SHAR

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Common Stock Outstanding [Member]	Treasury Stock [Member]	Additional Paid-In Capital [Member]	Common Shares Held In Treasury [Member]	Retained Earnings (Accumulated Deficit) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling interest	Total
Balance at Dec. 31, 2013				$ 187,742	$ (519)	$ (7,771)	$ (30,458)	$ 39,540	$ 188,534
Balance (shares) at Dec. 31, 2013	28,483
Treasury Stock, Shares, Beginning Balance at Dec. 31, 2013			320
Net income (loss) attributable to noncontrolling interest								(13,483)	(13,483)
Net income (loss)									(60,591)
Net income (loss) attributable to Stoneridge, Inc.						(47,108)			(47,108)
Benefit plan liability adjustments, net							141		141
Unrealized gain (loss) on derivatives, net							112		112
Currency translation adjustments							(15,268)	(3,507)	$ (18,775)
Issuance of restricted Common Shares ( in shares)	50
Forfeited restricted Common Shares ( in shares)	(238)
Forfeited restricted Common Shares (in treasury shares)			238
Repurchased Common Shares for treasury					(765)
Repurchased Common Shares for treasury (in shares)		(74)							(765)
Repurchased Common Shares for treasury (in treasury shares)			74
Share-based compensation				5,150					$ 5,150
Balance at Dec. 31, 2014				192,892	(1,284)	(54,879)	(45,473)	22,550	113,806
Balance (shares) at Dec. 31, 2014	28,221
Treasury Stock, Shares, Ending Balance at Dec. 31, 2014			632
Net income (loss) attributable to noncontrolling interest								(2,207)	(2,207)
Net income (loss)									20,567
Net income (loss) attributable to Stoneridge, Inc.						22,774			22,774
Benefit plan liability adjustments, net							(45)		(45)
Unrealized gain (loss) on derivatives, net							389		389
Currency translation adjustments							(24,693)	(7,033)	$ (31,726)
Issuance of restricted Common Shares ( in shares)	172
Issuance of restricted Common Shares ( in treasury shares)			(118)
Forfeited restricted Common Shares ( in shares)	(239)
Forfeited restricted Common Shares (in treasury shares)			239
Repurchased Common Shares for treasury					(2,924)
Repurchased Common Shares for treasury (in shares)		(242)							(2,924)
Repurchased Common Shares for treasury (in treasury shares)			242
Share-based compensation				6,362					$ 6,362
Balance at Dec. 31, 2015				199,254	(4,208)	(32,105)	(69,822)	13,310	$ 106,429
Balance (shares) at Dec. 31, 2015	27,912								27,912
Treasury Stock, Shares, Ending Balance at Dec. 31, 2015			995						995
Net income (loss) attributable to noncontrolling interest								(1,887)	$ (1,887)
Net income (loss)									75,574
Net income (loss) attributable to Stoneridge, Inc.						77,461			77,461
Benefit plan liability adjustments, net							(84)		(84)
Unrealized gain (loss) on derivatives, net							(408)		(408)
Currency translation adjustments							2,401	2,339	$ 4,740
Issuance of restricted Common Shares ( in shares)	67
Issuance of restricted Common Shares ( in treasury shares)			(8)
Forfeited restricted Common Shares ( in shares)	(3)
Forfeited restricted Common Shares (in treasury shares)			3
Repurchased Common Shares for treasury					(1,424)
Repurchased Common Shares for treasury (in shares)		(126)							(1,424)
Repurchased Common Shares for treasury (in treasury shares)			126
Tax benefit from share based compensation transactions				977					$ 977
Share-based compensation				6,273					6,274
Balance at Dec. 31, 2016				$ 206,504	$ (5,632)	$ 45,356	$ (67,913)	$ 13,762	$ 192,077
Balance (shares) at Dec. 31, 2016	27,850								27,850
Treasury Stock, Shares, Ending Balance at Dec. 31, 2016			1,116						1,116

Organization and Nature of Busi

Organization and Nature of Business	12 Months Ended
	Dec. 31, 2016
Organization and Nature of Business [Abstract]
Organization and Nature of Business	1. Organization and Nature of Business  Stoneridge, Inc. and its subsidiaries are global designers and manufacturers of highly engineered electrical and electronic components, modules and systems for the automotive, commercial, motorcycle, off-highway and agricultural vehicle markets.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2016
Summary of Significant Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies  Basis of Presentation  The accompanying consolidated financial statements include the accounts of Stoneridge, Inc. and its wholly-owned and majority-owned subsidiaries (collectively, the “Company”). Intercompany transactions and balances have been eliminated in consolidation. The Company analyzes its ownership interests in accordance with Accounting Standards Codification (“ASC”) “Consolidations (Topic 810)” to determine whether they are a variable interest entity and, if so, whether the Company is the primary beneficiary.  The Company’s investment in Minda Stoneridge Instruments Ltd. (“Minda”) for the years ended December 31, 2016, 2015 and 2014 has been determined to be an uncons olidated entity, and therefore is accounted for under the equity method of accounting based on our 49% ownership.  The Company had a 74% controlling interest in PST Eletrônica Ltda. (“ PST”) for the years ended December 31, 2016, 2015 and 2014 which i s accounted for a consolidated subsidiary.  The Company sold substantially all of the assets and liabilities of its Wiring business on August 1, 2014. As a result, the Wiring business has been classified as discontinued operations for all periods presented in the Company’s financial statements herein, and therefore has been excluded from both continuing operations and segment results for all periods presented. The Wiring business designed and manufactured wiring harness products and assembled instruments panels for sale principally to the commercial, agricultural and off-highway vehicle markets.  Accounting Estimates  The preparation of financial statements in conformity with U.S. Generally Accepted Accounting Principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, including certain self-insured risks and liabilities, disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Because actual results could differ from those estimates, the Company revises its estimates and assumptions as new information becomes available.  Cash and Cash Equivalents  The Company’s cash and cash equivalents are actively traded money market funds with short-term investments in marketable securities, primarily U.S. government securities. Cash and cash equivalents are stated at cost, which approximates fair value, due to the highly liquid nature and short-term duration of the underlying securities with original maturities of 90 days or less .  Accounts Receivable and Concentration of Credit Risk  Revenues are principally generated from the automotive, commercial, motorcycle, off-highway and agricultural vehicle markets. The Company’s largest customers are Ford Motor Company, General Motors Company and Scania Group, primarily related to the Control Devices and Electronics reportable segments and accounted for the following percentages of consolidated net sales for the years ended December 31, 2016, 2015 and 2014:    2016 2015 2014  Ford Motor Company 17 % 14 % 11 %  General Motors Company 7 % 5 % 5 %  Scania Group 6 % 7 % 8 %  Accounts receivable are recorded at the invoice price, net of an estimate of allowance for doubtful accounts and other reserves.  Al lowance for Doubtful Accounts  The Company evaluates the collectability of accounts receivable based on a combination of factors. In circumstances where the Company is aware of a specific customer’s inability to meet its financial obligations, a specific allowance for doubtful accounts is recorded against amounts due to reduce the net recognized receivable to the amount the Company reasonably believes will be collected. Additionally, the Company reviews historical trends for collectability in determining an estimate for its allowance for doubtful accounts. If economic circumstances change substantially, estimates of the recoverability of amounts due to the Company could be reduced by a material amount. The Company does not have collateral requirements with its customers.  Sales of Accounts Receivable  The Company’s PST segment sells selected accounts receivable on a full recourse basis to an unrelated financial institution in Brazil. PST accounts for these transactions as sales of accounts receivable. As such, in accordance with ASC 860, “Transfers and Servicing”, the sales of accounts receivable are reflected as a reduction of accounts receivable in the consolidated balance sheets and the loss on sale is recorded within interest expense, net in the consolidated statements of operations while the proceeds received from the sale are included in the cash flows from operating activities in the consolidated statements of cash flows.  During 2016 PST sold $15,297 ( 53,886 Brazilian real) of accounts receivable at a loss of $459 ( 1,615 Brazilian real), which represents the implicit interest on the transaction, and received proceeds of $14,838 ( 52,271 Brazilian real). PST had a remaining credit exposure of $1,067 ( 3,476 Brazilian real) at December 31, 2016 related to the receivables sold for which payment from the customer was not yet due.  During 2015 PST sold $6,401 ( 24,994 Brazilian real ) of accounts receivable at a loss of $156 ( 540 Brazilian real), which represents the implicit interest on the transaction, and received proceeds of $6,245 ( 24,454 Brazilian real ).  Inventories  Inventories are valued at the lower of cost (using either the first-in, first-out (“FIFO”) or average cost methods) or market. 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 consist of the following:    As of December 31 2016 2015  Raw materials $ 35,665 $ 36,021  Work-in-progress 7,483 7,162  Finished goods 16,969 17,826  Total inventories, net $ 60,117 $ 61,009  Inventory valued using the FIFO method was $37,765 and $ 35,378 at December 31, 2016 and 2015, respectively. Inventory valued using the average cost method was $22,352 and $ 25,631 at December 31, 2016 and 2015, respectively.  Pre-production Costs Related to Long-term Supply Arrangements  Engineering, research and development and other design and development costs for products sold on long-term supply arrangements are expensed as incurred unless the Company has a contractual guarantee for reimbursement from the customer. Costs for molds, dies and other tools used to make products sold on long-term supply arrangements for which the Company either has title to the assets or has the noncancelable right to use the assets during the term of the supply arrangement are capitalized in property, plant and equipment and amortized to cost of sales over the shorter of the term of the arrangement or over the estimated useful lives of the assets, typically three to five years. Costs for molds, dies and other tools used to make products sold on long-term supply arrangements for which the Company has a contractual guarantee to a lump sum reimbursement from the customer are capitalized either as a component of prepaid expenses and other current assets or an investment and other long term asset within the consolidated balance sheets. Capitalized pre-production costs were $6,859 an d $9,405 at December 31, 2016 and 2015 , respectively. At December 31, 2016 and 2015, $6,446 and $9,405 were recorded as a component of prepaid expenses and other current assets on the consolidated balance sheets while the remaining amounts were recorded as a component of investments and other long term assets.  Discontinued Operations Wiring Business On May 26, 2014, the Company entered into an asset purchase agreement to sell substantially all of the assets and liabilities of the former Wiring segment to Motherson Sumi Systems Ltd., an India-based manufacturer of diversified products for the global automotive industry and a limited company incorporated under the laws of the Republic of India, and MSSL (GB) LIMITED, a limited company incorporated under the laws of the United Kingdom (collectively, “Motherson”), for $65,700 in cash and the assumption of certain related liabilities of the Wiring business. On August 1, 2014, the Company completed the sale of substantially all of the assets and liabilities of its Wiring business to Motherson for $71,386 in cash that consisted of the stated purchase price and estimated working capital on the closing date. The final purchase price was subject to post-closing working capital and other adjustments. Upon the final resolution of the working capital and other adjustments in the second quarter of 2015, the Company returned $1,230 in cash to Motherson.  The Company recorded a loss on disposal, net of tax of $8,576 for the year ended December 31, 2014 which included the recognition of previously deferred foreign currency translation of $2,734 , income tax on the sale of Wiring’s Mexican businesses of $1,621 and transaction costs of $1,384 . The Company also entered into short-term transition services agreements with Motherson substantially all of which concluded in the second quarter of 2015 associated with information systems, accounting, administrative, occupancy and support services as well as contract manufacturing and production support in Estonia. The Company had post-disposition sales to the Wiring business acquired by Motherson of $19 ,766 , $26,952 and $12,230 for the years ended December 31, 2016, 2015, and 2014, respectively. The Company had post-disposition purchases from the Wiring business acquired by Motherson of $425 , $689 and $269 for the years ended December 31, 2016, 2015 and 2014, respectively. The amounts related to 2014 cover the period from August through December 2014 because the sale of the Wiring business occurred on August 1, 2014.  The following tables display summarized activity in our consolidated statements of operations for discontinued operations during the years ended December 31, 2015 and 2014, related to the Wiring business. There were no discontinued operations for the year ended December 31, 2016.     Years ended December 31 2015 2014 (A)   Net sales $ - $ 167,434  Cost of goods sold (C) - 154,787  Selling, general and administrative (C) - 12,697  Interest expense, net - 69  Other expense (income), net - (58)  Loss from operations of discontinued  operations before income taxes (C) - (61)  Income tax expense on discontinued operations - (750)  Loss from discontinued operations, net of tax - (811)   Loss on disposal (B) $ (241) $ (6,955)  Income tax expense on gain (loss) on disposal (D) 31 (1,621)  Loss on disposal, net of tax (210) (8,576)   Loss from discontinued operations $ (210) $ (9,387)  (A) The operations of the Wiring business were presented only for the seven months ended July 31, 2014 because the sale was completed on August 1, 2014.  (B) Included in loss on disposal for the years ended December 31, 2015 and 2014 were transaction costs of $223 and $1,384 , respectively. The loss on disposal also includes a working capital and other adjustments of $18 for the year ended December 31, 2015. In addition, the loss on disposal included $2,734 in previously deferred foreign currency translation for the year ended December 31, 2014.  (C) The assets and liabilities of the Wiring business were reclassified as held for sale effective May 26, 2014. Accordingly, depreciation and amortization for the related Wiring assets were not recorded after that date.  (D) Gains and losses from foreign currency remeasurement related to income taxes were included as a component of income tax (expense) benefit.     Years ended December 31 2014  Depreciation and amortization $ 2,111  Capital expenditures 1,238  Predisposition intercompany sales to the Wiring business were $17,448 for the seven month period ended July 31, 2014. Predisposition intercompany purchases from the Wiring business were $4,025 for the seven month period ended July 31, 2014 .  P roperty, Plant and Equipment  Property, plant and equipment are recorded at cost and consist of the following:     As of December 31 2016 2015  Land and land improvements $ 3,376 $ 3,538  Buildings and improvements 32,271 32,904  Machinery and equipment 180,944 160,721  Office furniture and fixtures 6,813 6,541  Tooling 67,261 68,101  Information technology 23,632 24,035  Vehicles 398 422  Leasehold improvements 2,583 2,581  Construction in progress 16,854 23,914  Total property, plant, and equipment 334,132 322,757  Less: accumulated depreciation (242,632) (237,493)  Property, plant and equipment, net $ 91,500 $ 85,264  Depreciation is provided using the straight-line method over the estimated useful lives of the assets. Depreciation expense for the years ended December 31, 2016, 2015 and 2014 was $19,998 , $18,964 and $22,299 , respectively. Depreciable lives within each property classification are as follows:     Buildings and improvements 10 -40 years  Machinery and equipment 3 -10 years  Office furniture and fixtures 3 -10 years  Tooling 2 -5 years  Information technology 3 -5 years  Vehicles 3 -5 years  Leasehold improvements shorter of lease term or 3-10 years  Maintenance and repair expenditures that are not considered improvements and do not extend the useful life of the property, plant and equipment are charged to expense as incurred. Expenditures for improvements and major renewals are capitalized. When assets are retired or otherwise disposed of, the related cost and accumulated depreciation are removed from the accounts, and any gain or loss on the disposition is recorded in the consolidated statements of operations as a component of selling, general and administrative expenses.  Impairment of Long-Lived or Finite-Lived Assets  The Company reviews the carrying value of its long-lived assets and finite-lived intangible assets for impairment when events or circumstances indicate that their carrying value may not be recoverable. Factors the Company considers important that could trigger testing of the related asset groups for an impairment include current period operating or cash flow losses combined with a history of operating or cash flow losses, a projection or forecast that demonstrates continuing losses, significant adverse changes in the business climate within a particular business or current expectations that a long-lived asset will be sold or otherwise disposed of significantly before the end of its estimated useful life. To test for impairment, the estimated undiscounted cash flows expected to be generated from the use and disposal of the asset or asset group is compared to its carrying value. An asset group is established by identifying the lowest level of cash flows generated by the group of assets that are largely independent of cash flows of other assets. If cash flows cannot be separately and independently identified for a single asset, we will determine whether an impairment has occurred for the group of assets for which we can identify projected cash flows. If these undiscounted cash flows are less than their respective carrying values, an impairment charge would be recognized to the extent that the carrying values exceed estimated fair values. The estimation of undiscounted cash flows and fair value requires us to make assumptions regarding future operating results over the life of the asset or the life of the primary asset in the asset group. The results of the impairment testing are dependent on these estimates which require judgment. The occurrence of certain events, including changes in economic and competitive conditions, could impact cash flows eventually realized and management’s ability to accurately assess whether an asset is impaired.  Due to the lower actual and forecasted financial results from weakness in the Brazilian economy and automotive market, the Company performed an evaluation of PST’s long-lived assets in 2016 , and concluded that the carrying amount of the asset group was recoverable as the undiscounted cash flows of the asset group exceeded its carrying amount.  Goodwill and Other Intangible Assets  Goodwill  The total purchase price associated with acquisitions is allocated to the acquisition date fair values of identifiable assets acquired and liabilities assumed with the excess purchase price assigned to goodwill. Goodwill is subject to an annual assessment for impairment (or more frequently if impairment indicators arise) by applying a fair value-based test.  The Company recorded goodwill related to the acquisition of controlling interest in PST in 2011, all of which was deemed to be impaired in 2014. The remaining goodwill balance at December 31, 2016 and 2015 relates to the acquisition of two European aftermarket distributors, which is included within the Electronics segment.  The carrying amount of goodwill related to our Electronics segment decreased by $50 for the year ended December 31, 2016 to $931 due to foreign currency translation. The carrying amount of goodwill related to our Electronics segment decreased by $97 for the year ended December 31, 201 5 to $981 due to foreign currency translation.  Goodwill and changes in the carrying amount of goodwill by segment for the year then ended December 31, 2014 was as follows:      Electronics PST Total  Balance at January 1, 2014 $ 604 $ 53,744 $ 54,348  Acquisition of aftermarket business 664 - 664  Goodwill impairment - (51,458) (51,458)  Currency translation (190) (2,286) (2,476)  Balance at December 31, 2014 $ 1,078 $ - $ 1,078  The Company’s cumulative goodwill impairment loss since inception was $300,083 at December 31, 2016 and 2015. In addition to PST’s 2014 goodwill impairment, the cumulative goodwill impairment loss includes the goodwill impairment recorded by the Company’s Control Devices segment in 2008 and 2004.   PST Goodwill Impairment Assessments During the second quarter of 2014, indicators of potential impairment required the Company to conduct an interim impairment test for its majority owned subsidiary, PST . Those indicators included a decline in recent operating results and lower growth expectations primarily due to the weakening of the Brazilian economy and automotive market. In accordance with ASC 350, the Company completed “step one” of the impairment analysis and concluded that, as of June 30, 2014, the fair value of the PST reportable segment was below its carrying value, including goodwill. As a result, “step two” of the impairment test was initiated in accordance with ASC 350. The Company recorded its best estimate of $29,300 as a non-cash goodwill impairment charge (of which $6,436 was attributable to noncontrolling interest) as of June 30, 2014. Based on the Company’s completed “step two” analysis in the third quarter of 2014, the final goodwill impairment as of June 30, 2014 was $23,498 (of which $5,162 was attributable to noncontrolling interest). As such, the Company recorded an adjustment to reduce the goodwill impairment by $5,802 (of which $1,274 was attributable to noncontrolling interest) as of September 30, 2014.  In the fourth quarter of 2014, the Company conducted its annual goodwill impairment test for PST and completed “step one” of the impairment test concluding that as of October 1, 2014 the fair value of the PST reportable segment was less than its carrying value, including goodwill. PST’s fair value decreased further due to significantly lower sales and earnings growth expectations which were a result of lower forecasted growth in the Brazilian economy and automotive market and a forecasted decline in currency exchange rates thereby increasing PST’s material costs. Based on the completed “step two” analysis, a goodwill impairment charge of $27,960 (of which $6,142 was attributable to noncontrolling interest) was recorded in the fourth quarter of 2014 which represented all of the remaining PST goodwill. The aggregate goodwill impairment for the year ended December 31, 2014 was $51,458 (of which $11,304 was attributable to noncontrolling interest).  The fair value measurement of the reporting unit under the “step one” analysis and the “step two” analysis (a non-recurring fair value measure) in their entirety are classified as Level 3 inputs. The estimates and assumptions underlying the fair value calculations used in the Company's impairment test are uncertain by their nature and can vary significantly from actual results. Factors that management must estimate include, but are not limited to, industry and market conditions, sales volume and pricing, raw material costs, capital expenditures, working capital changes, cost of capital, debt-equity mix and tax rates. The estimates and assumptions that most significantly affect the fair value calculation are sales volume and the associated cash flow assumptions, market growth and weighted average cost of capital. The estimates and assumptions used in the estimate of fair value are consistent with those the Company uses in its internal planning.  The “step two” of the PST goodwill impairment test utilized the following methodologies in determining fair value. Buildings and machinery were valued at an estimated replacement cost for an asset of comparable age and condition. PST finite lived identified intangible assets are customer relationships, tradenames and technology. Customer relationships were valued using an excess earnings method, using various inputs such as the estimated customer attrition rate, future earnings forecast, the amount of contributory asset charges, and a discount rate. Tradenames and technology intangibles are valued using a relief from royalty method, which is based upon comparable market royalty rates for tradenames of similar value. Other working capital items are generally recorded at carrying value, unless there were known conditions that would impact the ultimate settlement amount of a particular item.  Other Intangible Assets  Other intangible assets, net at December 31, 2016 and 2015 consisted of the following:     Acquisition Accumulated  As of December 31, 2016 cost amortization Net  Customer lists $ 27,476 $ (9,138) $ 18,338  Tradenames 18,116 (4,558) 13,558  Technology 10,862 (3,498) 7,364  Other 41 (41) -  Total $ 56,495 $ (17,235) $ 39,260     Acquisition Accumulated  As of December 31, 2015 cost amortization Net  Customer lists $ 23,003 $ (6,101) $ 16,902  Tradenames 15,129 (3,043) 12,086  Technology 9,066 (2,336) 6,730  Other 34 (34) -  Total $ 47,232 $ (11,514) $ 35,718  Other intangible assets, net at December 31, 2016 include customer lists, tradenames and technology of $18,083 , $13,554 and $7 ,364 , respectively, related to the PST segment with the remaining amounts related to the Electronics segment.  The Company recognized $3,259 , $3,445 and $ 4,784 of amortization expense in 2016, 2015 and 2014, respectively. Amortization expense is included as a component of selling, general and administrative on the consolidated statements of operations. Annual a mortization expense for intangible assets is estimated to be approximately $3,200 for the years 2017 through 202 1 . The weighted-average remaining amortization period is approximately 12 years.  Accrued Expenses and Other Current Liabilities  Accrued expenses and other current liabilities consist of the following:     As of December 31 2016 2015  Compensation related liabilities $ 16,329 $ 17,878  Product warranty and recall obligations 6,727 4,446  Other (A) 18,433 16,596  Total accrued expenses and other current liabilities $ 41,489 $ 38,920  (A) “Other” is comprised of miscellaneous accruals, none of which individually contributed a significant portion of the total.  Income Taxes  The Company accounts for income taxes using the liability method. Deferred income taxes reflect the tax consequences on future years of differences between the tax basis of assets and liabilities and their financial reporting amounts. Future tax benefits are recognized to the extent that reali zation of such benefits is more likely than not to occur. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in the period that includes the enactment date.  Deferred tax assets are recognized to the ex tent that these assets are more likely than not to be realized (See Note 5). In making such a determination, the Company considers all available positive and negative evidence, including future r elease of existing taxable temporary differences, projected future taxable income, tax planning strategies, and results of recent operations. R elease of some or all of a valuation allowance would result in the recognition of certain deferred tax assets and a decrease to income tax expense for the period the r elease is recorded.  The Company's policy is to provide for uncertain tax positions and the related interest and penalties based upon management's assessment o f whether a tax benefit is more likely than not to be sustained upon examination by tax authorities . To the extent the Company prevails in matters for which a liability for an unrecognized tax benefit is established or is required to pay amounts in excess of the liability, the Company's effective tax rate in a given financial statement period may be affected.  Currency Translation  The financial statements of foreign subsidiaries, where the local currency is the functional currency, are translated into U.S. dollars using exchange rates in effect at the period end for assets and liabilities and average exchange rates during each reporting period for the results of operations. Adjustments resulting from translation of financial statements are reflected as a component of accumulated other comprehensive loss in the Company’s consolidated balance sheets.  Foreign currency transactions are remeasured into the functional currency using translation rates in effect at the time of the transaction with the resulting adjustments included on the consolidated statements of operations within other expense, net. These foreign currency transaction (gains) losses, including the impact of hedging activities, were $(268) , $1,693 and $1,212 for the years ended December 31, 2016, 2015 and 2014, respectively.  Revenue Recognition and Sales Commitments  The Company recognizes revenues from the sale of products, net of actual and estimated returns, at the point of passage of title, which is either at the time of shipment or upon customer receipt based upon the terms of the sale. The Company recognizes monitoring service revenues as the services are provided to customers. The Company collects certain taxes and fees on behalf of government agencies and remits such collections on a periodic basis. The taxes are collected from customers but are not included in net sales. Estimated returns are based on historical authorized returns. The Company often enters into agreements with its customers at the beginning of a given vehicle’s expected production life. Once such agreements are entered into, it is the Company’s obligation to fulfill the customers’ purchasing requirements for the entire production life of the vehicle. These agreements are subject to potential renegotiation from time to time, which may affect product pricing.  Shipping and Handling Costs  Shipping and handling costs are included in cost of goods sold on the consolidated statements of operations.  Product Warranty and Recall Reserves  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 the product warranty and recall reserve is included as a component of accrued expenses and other current liabilities on the consolidated balance sheets. Product warranty and recall includes $2,617 and $1,973 of a long-term liability at December 31, 2016 and 2015, respectively, which is included as a component of other long-term liabilities on the consolidated balance sheets. The following provides a reconciliation of changes in the product warranty and recall reserve:    Years ended December 31 2016 2015  Product warranty and recall at beginning of period $ 6,419 $ 7,601  Accruals for products shipped during period 4,999 4,609  Aggregate changes in pre-existing liabilities due to claim developments (116) (156)  Settlements made during the period (1,958) (5,635)  Product warranty and recall at end of period $ 9,344 $ 6,419  Design and Development Costs Expenses associated with the development of new products, and changes to existing products are charged to expense as incurred, and are included in the Company’s consolidated statements of operations as a separate component of costs and expenses. These product development costs amounted to $40,212 , $38,792 and $41,609 for the years ended December 31, 2016, 2015 and 2014, respectively, or 5.8% , 6.0% and 6.3% of net sales for these respective periods.  Research and Development Activities  The Company’s Electronics and Control Devices segment s enter into research and development contracts with certain customers, which generally provide for reimbursement of costs. The Company incurred and was reimbursed for contracted research and development costs of $12, 764 , $9,659 and $12,319 for the years ended December 31, 2016, 2015 and 2014, respectively.  Share-Based Compensation  At December 31, 2016, the Company had two types of share-based compensation plan s: (1) Long-Term Incentive Plan for employees and (2) the Amended Directors’ Restricted Shares Plan, for non-employee directors. The Long-Term Incentive Plan is made up of the Long-Term Incentive Plan which expired on June 30, 2007 , the Amended and Restated Long-Term Incentive Plan, as amended, which expired on April 24, 2016 and the 2016 Long-Term Incentive Plan that was approved by shareholders on May 10, 2016, and expires on May 10, 2026 .  Total compensation expense recognized as a component of selling, general and administrative expense on the consolidated statements of operations for share-based compensation arrangements was $6,134 , including $545 related to the modification of the retirement notice provisions of certain awards, $7,224 , including $2,225 from the accelerated vesting in connection with the retirement of the Company’s former President and Chief Executive Officer , and $5,406 for the years ended December 31, 2016, 2015 and 2014, respectively. Of these amounts, $(117) , $828 and $243 for the years ended December 31, 2016, 2015 and 2014, respectively, were related to the Long-Term Cash Incentive Plan “Phantom Shares” discussed in Note 8. There was no share-based compensation expense capitalized in inventory during 2016, 2015 or 2014.  Financial Instruments and Derivative Financial Instruments  Financial instruments, including derivative financial instruments, held by the Company include cash and cash equivalents, accounts receivable, accounts payable, long-term debt, an interest rate swap, fixed price commodity contracts and foreign currency forward contracts. The carrying value of cash and cash equivalents, accounts receivable and accounts payable is considered to be representative of fair value because of the short maturity of these instruments. See Note 9 for fair value disclosures of the Company’s financial instruments.  Common Shares Held in Treasury  The Company accounts for Common Shares held in treasury under the cost method (applied on a FIFO basis) and includes such shares as a reduction of total shareholders’ equity. Earnings (Loss) Per Share  Basic earnings (loss) per share was computed by dividing net income attributable to Stoneridge Inc. by the weighted

Investments

Investments	12 Months Ended
	Dec. 31, 2016
Investments [Abstract]
Investments	3. Investments  Minda Stoneridge Instruments Ltd.  The Company has a 49% interest in Minda, a company based in India that manufactures electronics, instrumentation equipment and sensors for the motorcycle and commercial vehicle markets. 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 consolidated balance sheets, was $7,952 and $ 6,929 as of December 31, 2016 and 2015, respectively. Equity in earnings of Minda included in the consolidated statements of operations w ere $ 1,233 , $608 and $815 for the years ended December 31, 2016, 2015 and 2014, respectively.  PST Eletrônica Ltda.  The Company has a 74% controlling interest in PST for the years ended December 31, 2016, 2015 and 2014. Noncontrolling interest in PST increased by $452 to $13, 762 at December 31, 2016 due to a proportionate share of its net loss of $1,887 for the year ended December 31, 2016 and a favorable change in foreign currency translation of $2,339 . Noncontrolling interest in PST decreased by $ 9,240 to $ 13,310 at December 31, 2015 due to a proportionate share of its net loss of $ 2,207 for the year ended December 31, 2015 and an unfavorable change in foreign currency translation of $ 7,033 . Noncontrolling interest in PST decreased by $16,990 to $22,540 at December 31, 2014 due to a proportionate share of its net loss of $13,483 including goodwill impairment for the year ended December 31, 2014 and an unfavorable change in foreign currency translation of $3,507 .  Comprehensive gain (loss) related to PST noncontrolling interest was $452, $ (9,240) and $ (16,990) for the years ended December 31, 201 6, 2015 and 2014, respectively .  PST has dividends payable declared in previous years to noncontrolling interest of $10,842 Brazilian real ( $3,327 ) and $10,842 Brazilian real ( $2,777 ) at December 31, 2016 and 2015, respectively. 

Debt

Debt	12 Months Ended
	Dec. 31, 2016
Debt [Abstract]
Debt	          4. Debt    Interest rates at  December 31, December 31, December 31,  2016 2015 2016 Maturity  Revolving Credit Facility  Credit facility $ 67,000 $ 100,000 2.00% September 2021   Debt  PST short-term obligations 5,097 11,556 4.27% - 20.33% 2017  PST long-term notes 11,452 6,428 7.5% - 19.00% 2017 - 2021  Other 137 379  Total debt 16,686 18,363  Less: current portion (8,626) (13,905)  Total long-term debt, net $ 8,060 $ 4,458  Revolving Credit Facility  On November 2, 2007, the Company entered into an asset-based credit facility which permitted 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 “ Credit 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. In 2014, the Company capitalized $1,666 of deferred financing costs and recognized a $100 loss on extinguishment of previously recorded deferred finan cing costs associated with amending the Credit Agreement. On March 26, 2015, the Compa ny entered into Amendment No. 1 of the Credit Amendment which amended 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 Credit Agreement and the early extinguishment of the Company’s 9.5% Senior Notes totaling $10,507 both of which occurred in second half of 2014. 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 Compan y entered into Amendment No. 2 o f the Credit Facility 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 Compan y entered into Amendment No. 3 o f the Credit Agreement which extended of the expiration date of the Credit Agreement by two years to September 12, 2021 , increased the borrowing sub-limit for the Company’s foreign subsidiaries by $30,000 to $80,000 , increased the basket of permitted loans and investments in foreign subsidiaries by $5,000 to $30,000 , and provided additional flexibility to the Company for certain permitted corporate transactions involving its foreign subsidiaries as defined in the Agreement. As a result of Amendment No. 3, the Company capitalized deferred financing costs of $399 , which will be amortized over the remaining term of the Credit Facility.  Borrowings under the Credit Facility will bear interest at either the Base Rate, as defined, or the LIBOR Rate, at the Company’s option, plus the applicable margin as set forth in the Credit Facility . The Company is also subject to a commitment fee ranging from 0.20% to 0.35% based on the Company’s leverage ratio. The agreement governing our Credit Facility 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 Credit Facility 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 at December 31, 2016 and 2015 were $67,000 and $100,000 respe ctively. The Company has outstanding letters of credit of $3,399 at December 31, 2016.  The Company was in compliance with all Credit Facility covenants at December 31, 2016 and 2015.  Debt On October 4, 2010, the Company issued $175,000 of senior notes which bore interest at an annual rate of 9.5% and had a maturity of October 15, 2017 . On September 2, 2014, the Company redeemed $17,500 or 10.0% , of its senior notes at a price of 103.0% of the principal amount. As a result of the redemption, the Company recognized a loss on extinguishment of debt of $820 in the third quarter of 2014, which included a premium of $525 and the acceleration of both the associated deferred financing costs and original issue discount totaling $295 . On October 15, 2014, the Company redeemed the remaining $157,500 of its senior notes at a price of 104.75% of the principal amount discharging the corresponding senior notes indenture. As a result of the redemption, the Company recognized a loss on extinguishment of debt of $9,687 in the fourth quarter of 2014, which included a premium of $7,481 and the acceleration of the remaining deferred financing costs of $535 , original issue discount of $2,019 and de-designation date unrecognized gain on the interest rate swap of $348 . The senior notes were redeemed using funds from borrowing $100,000 under the Credit Facility, proceeds from the sale of the Wiring business and existing cash.  PST maintains several short-term obligations and long-term notes used for working capital purposes which have fixed interest rates. The weighted-average interest rates of short-term and long-term debt of PST at December 31, 2016 were 10.3% and 14.1% , respectively. Depending on the specific note, interest is payable either monthly or annually. Principal payments on PST debt at December 31, 2016 are as follows: $8,48 9 in 2017, $4, 303 in 2018, $2,604 in 2019, $611 in 2020, and $542 in 2021 .  For the period of February 2014 to April 2015, the Company's wholly-owned subsidiary located in Suzhou, China held term loan s in the amount of 9,000 Chinese yuan (the "Suzhou note"). Interest was payable quarterly at 120.0% of the one-year lending rate published by The People's Bank of China.  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 $2,196 and $ 2,369 , at December 31, 2016 and 2015, respectively. At December 31, 2016 and 2015, there was no balance outstanding on this bank account.  The Company was in compliance with all debt covenants at December 31, 2016 and 2015.  At December 31, 2016, the future maturities of debt were as follows:     Year ended December 31  2017 $ 8,626  2018 4,303  2019 2,604  2020 611  2021 67,542  Total $ 83,686 

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2016
Income Taxes [Abstract]
Income Taxes	          5. Income Taxes  The income tax expense (benefit) included in the accompanying consolidated statement of operations represents federal, state and foreign income taxes. The components of income (loss) before income taxes and the provision for income taxes consist of the following:   Years ended December 31 2016 2015 2014 Income (loss) before income taxes:  Domestic $ 35,088 $ 22,959 $ 1,635  Foreign 4,097 (2,729) (54,695)  Total income (loss) before income taxes $ 39,185 $ 20,230 $ (53,060) Provision for income taxes: Current:  Federal $ 760 $ 386 $ -  State and foreign 2,575 1,232 1,382  Total current expense 3,335 1,618 1,382 Deferred:  Federal (37,828) - -  State and foreign (1,896) (2,165) (3,238)  Total deferred benefit (39,724) (2,165) (3,238)  Total income tax benefit $ (36,389) $ (547) $ (1,856)   A reconciliation of the Company’s effective income tax rate to the statutory federal tax rate is as follows:    Years ended December 31 2016 2015 2014  Statutory U.S. federal income tax rate 35.0 % 35.0 % (35.0) %  State income taxes, net of federal tax benefit 1.9 0.2 -  Tax credits (0.8) (2.8) (1.3)  Foreign tax rate differential (4.7) (3.3) 0.2  Reduction (increase) of income tax accruals 0.1 (0.5) 0.2  Tax on foreign dividends, net of foreign tax credits - - (0.1)  Reduction (increase) of deferred taxes (1.3) 5.5 -  Valuation allowances (121.6) (36.0) (2.1)  Loss of domestic flow-through entity not attributable to Stoneridge, Inc. - - 33.9  Non-deductible compensation - (1.5) 1.0  Other (1.4) 0.7 (0.3)  Effective income tax rate (92.8) % (2.7) % (3.5) %  The Company recognized income tax expense (benefit) of $(36,389) or (92.8)% , $(547) or (2.7)% and $(1,856) or (3.5)% of income (loss) before income taxes for federal, state and foreign income taxes for the years ended December 31, 2016, 2015 and 2014, respectively. The increase in tax benefit for the year ended December 31, 2016 compared to the same period for 2015 was predominantly due to the release of the U.S. federal, certain state and foreign valuation allowances that were previously recorded against certain deferred tax assets. The decrease in tax benefit for the year ended December 31, 2015 compared to the same period for 2014 was predominantly due to the recording a valuation allowance against the PST ’s Brazilian deferred tax assets. The increase in the effective tax rate to (2.7)% in 201 5 from (3.5)% in 201 4 was primarily due to providing a valuation allowance in 2015 with respect to the Brazilian deferred tax assets related to PST. The impact on the effective tax rate due to the PST valuation allowance was offset by the impact of the improvement in the performance of the U.S. operations, which do not attract tax due to the full valuation allowance, and the prior year impact of the nondeductible goodwill impairment in 2014 that did not impact the effective tax rate for 2015.  The Company has not recorded deferred income taxes on the undistributed earnings of its foreign subsidiaries because of management’s intent and ability to indefinitely reinvest such earnings. At December 31, 2016 the aggregate undistributed earnings of our foreign subsidiaries amounted to $44,898 . The Company may be subject to U.S. income taxes and foreign withholding taxes if these earnings were distributed. It is not practicable to estimate the amount of taxes, if any, that may be payable on these earnings as that estimate depends upon circumstances that would exist at the time a remittance occurs.  Significant components of the Company’s deferred tax assets and liabilities were as follows:   As of December 31 2016 2015 Deferred tax assets:  Inventories $ 2,156 $ 2,108  Employee compensation and benefits 4,785 3,902  Insurance 245 281  Depreciation and amortization 1,310 1,297  Net operating loss carryforwards 28,952 39,846  General business credit carryforwards 14,135 12,990  Other reserves 7,609 5,643  Gross deferred tax assets 59,192 66,067  Less: Valuation allowance (11,125) (59,391)  Deferred tax assets less valuation allowance 48,067 6,676  Deferred tax liabilities:  Depreciation and amortization (14,911) (13,282)  Basis difference - equity investee (31,016) (31,016)  Other (1,358) (1,074)  Gross deferred tax liabilities (47,285) (45,372)   Net deferred tax asset (liability) $ 782 $ (38,696)  The balance sheet classification of our net deferred tax asset is shown below :     Years ended December 31 2016 2015   Current deferred income tax assets - 1,239  Current deferred income tax liabilities - (39)  Long-term deferred income tax assets 10,542 1,436  Long-term deferred income tax liabilities (9,760) (41,332)  Net deferred tax asset $ 782 $ (38,696)  The Company adopted ASU 2015-17 in 2016. As such, all deferred tax assets and liabilities are classified as long-term at December 31, 2016.  Based on the Company’s review of both positive and negative evidence regarding the continuation of the tax valuation allowance at December 31, 2015 and 2014, a valuat ion allowance the U.S. federal, certain state and foreign deferred tax assets continued to be recorded based upon the conclusion that it was more likely than not they would not be realized before they expired.  The financial results for the U.S. operation improved significantly in 2016 due to the earnings growth of Control Devices segment as well as a significant reduction in interest expense as a re sult of the Company’s refinancing activities in the f all of 201 4. The U.S. operation is in a three year cumulative income position at December 31, 2016. Based on the available positive and negative evidence and the weight accorded to that evidence at December 31, 2016, the Company has determined that the significant positive evidence outweighed the negative evidence. Therefore, the Company has concluded that it is more likely than not that the U.S. federal deferred tax assets will be realized (including those that carry expiration dates) and accordingly will no longer provide a valuation allowance against its domestic deferred tax assets. In addition, the Company concluded that it is more likely than not that the certain state and foreign, deferred tax assets will be realized, and as such the previously provided valuation allowances were re leased . The total U.S. valuation allowance remaining represents the amount of tax benefit related to certain state and certain foreign net operating losses, credits and other deferred tax assets that are not expected to be realized at December 31, 2016.  Based on a review of objective positive and negative evidence at December 31, 2016 and 2015, the Company co ncluded that it was more likely than not that the deferred tax assets of PST w ould not be realized. As a result the Company provided a valuation allowance, net of certain future reversing taxable temporary differences, with respect to PST’s deferred tax assets. The total valuation allowance at December 31, 2015 represents the amount of tax benefit related to PST’s net operating losses, credits and other deferred tax assets that are not expected to be realized .  The Company has net operating loss carry forwards of $53,064 , $41,222 and $35,849 for U.S. federal, state and foreign tax jurisdictions, respectively. The U.S. federal net operating losses, if unused, begin to expire in 2026 , the state net operating losses expire at various times and the foreign net operating losses expire at various times or have indefinite expiration dates. The Company has general business and foreign tax credit carry forwards of $15 ,254 , $1,530 a nd $1, 510 for U.S . federal, state and foreign jurisdictions respectively. The U.S. federal general business credits, if unused, begin to expire in 2021 , and the state and foreign tax credits expire at various times.  The Company is required to provide a deferred tax liability corresponding to the difference between the financial reporting basis (which was remeasured to fair value upon the acquisition of an additional 24% of PST in 2011) and the tax basis in the previously held 50% ownership interest in PST (the “outside” basis difference). This outside basis difference will generally remain fixed until (1) dividends from the subsidiary exceed the parent’s share of earnings subsequent to the date it became a subsidiary or (2) there is a transaction that affects the Company’s ownership of PST.  The following is a reconciliation of the Company’s total gross unrecognized tax benefits:     2016 2015 2014  Balance as of January 1 $ 4,304 $ 3,888 $ 3,624   Tax positions related to the current year:  Additions 208 201 217  Tax positions related to the prior years:  Additions - 523 168  Reductions (61) - -  Expirations of statutes of limitation (612) (308) (121)   Balance as of December 31 $ 3,839 $ 4,304 $ 3,888  At December 31, 2016 , the Company has classified $146 as a noncurrent liability and $3,731 as a reduction to non-current deferred income tax assets. The amount of unrecognized tax benefits is not expected to change significantly during the next 12 months. Management is currently unaware of issues under review that could result in a significant change or a material deviation in this estimate. If the Company’s tax positions are sustained by the taxing authorities in favor of the Company, the amount that would affect the Company’s effective tax rate is approximately $3,821 and $4,280 at December 31, 2016 and 2015, respectively.  T he Company classifies interest expense and, if applicable, penalties which could be assessed related to unrecognized tax benefits as a component of income tax expense (benefit). For the years ended December 31, 2016, 2015 and 2014, the C ompany recognized approximatel y $ (59) , $(90) and $(411) of gross interest and penalties, respectively. The Company has accrued approximately $64 and $123 for the payment of interest and penalties at December 31, 2016 and 2015, respectively.  The Company conducts business globally and, as a result, files income tax returns in the U.S. federal jurisdiction and various state and foreign jurisdictions. In the normal course of business the Company is subject to examination by taxing authorities throughout the world. The following table summarizes the open tax years for each important jurisdiction:    Jurisdiction Open Tax Years  U.S. Federal 2013 - 2016  Brazil 2011 - 2016  China 2013 - 2016  France 2012 - 2016  Mexico 2012 - 2016  Spain 2012 - 2016  Sweden 2011 - 2016  United Kingdom 2012 - 2016 

Operating Lease Commitments

Operating Lease Commitments	12 Months Ended
	Dec. 31, 2016
Operating Lease Commitments [Abstract]
Operating Lease Commitments	6. Operating Lease Commitments  The Company leases equipment, vehicles and buildings from third parties under operating lease agreements. For the years ended December 31, 2016, 2015 and 2014, lease expense totaled $5,290 , $5,532 and $5,836 , respectively.  Future minimum operating lease commitments as of December 31, 2016 were as follows:     Year ended December 31  2017 $ 5,042  2018 3,922  2019 3,356  2020 2,584  2021 2,298  Thereafter 6,176  Total $ 23,378 

Share-Based Compensation Plans

Share-Based Compensation Plans	12 Months Ended
	Dec. 31, 2016
Share-Based Compensation Plans [Abstract]
Share-Based Compensation Plans	7. Share-Based Compensation Plans  In April 2006, the Company’s shareholders approved the Amended and Restated Long-Term Incentive Plan (the "2006 Plan") and reserved 1,500,000 Common Shares of which the maximum number of Common Shares which may be issued subject to incentive stock options is 500,000 . In May 2010, shareholders approved an amendment to the 2006 Plan to increase the number of shares by 1,500,000 to 3,000,000, and in May 2013, shareholders approved an other amendment to this plan to increase the number of shares by 1,500,000 to 4,500,000 . As the 2006 Plan expired in May 2016 , there were no shares available for grant at December 31, 2016. A s of December 31, 2016, there are 1,358,504 s hares granted subject to future vesting of which 583,404 shares were time-ba sed and 785,100 were performance-based.  In May 2016, the Company’s shareholders approved the 2016 Long-Term Incentive Plan (the "2016 Plan") and reserved 1,800,000 Common Shares of which the maximum number of Common Shares which may be issued. Under the 2016 Plan, as of December 31, 2016, the Company has granted 68,673 share units, of which 28,633 were time-based with cliff vesting using the straight-line method and 40,040 were performance-based. There are 1,731,327 shares available to be granted under the 2016 Plan at December 31, 2016.  In 2011 and 2012, pursuant to the 2006 Plan, the Company granted time-based, market-based and performance-based restricted Common Share awards. The time-based restricted Common Share awards cliff vest three years after the date of grant. The performance-based restricted Common Share awards vest and are no longer subject to forfeiture upon the recipient remaining an employee of the Company for three years from the date of grant and, for one half of the annual awards, upon the Company attaining certain targets of performance measured against a peer group’s performance in terms of total shareholder return and, for the remaining half of the annual awards, upon achieving certain annual net income per share targets established by the Company during the performance period of the award.  In 2013, pursuant to the 2006 Plan, the Company granted time-based restricted Common Share and market-based restricted Common Share awards. The time-based restricted Common Share awards cliff vest three years after the date of grant. The performance-based restricted Common Share awards vest and are no longer subject to forfeiture upon the recipient remaining an employee of the Company for three years from the date of grant and upon the Company attaining certain targets of performance measured against a peer group’s performance in terms of total return to shareholders.  In 2014, 2015 and 2016 pursuant to the 2006 Plan, the Company granted time-based and performance -based share units . The time-based share units cliff vest three years after the date of grant. The performance based share unit s vest and are no longer subject to forfeiture upon the recipient remaining an employee of the Company for three years from the date of grant and, for a portion of the annual awards, upon the Company attaining certain targets of performance measured against a peer group’s three year performance in terms of total shareholder return and, for the remaining portion of the annual awards, upon achieving certain annual earnings per share targets established by the Company during the performance period of the award.  The allocation of performance shares between total shareholder return and earnings per share were as follows for the years ended December 31:     2016 2015 2014  Total shareholder return 55 % 36 % 20 %  Earnings per share 45 % 64 % 80 %   In April 2005, the Company adopted the Directors’ Restricted Shares Plan (the “Director Share Plan”) and reserved 500,000 Common Shares for issuance under the Director Share Plan. In May 2013, shareholders approved an amendment to the Director Share Plan to increase the number of shares for issuance by 200,000 to 700,000 . Under the Director Share Plan, the Company has cumulatively issued 580,609 restricted Common Shares. As such, there are 119,391 restricted Common Shares available to be issued at December 31, 2016. Shares issued annually under the Director Share Plan vest one year after the date of grant.  Restricted Shares  The fair value of the non-vested time-based restricted Common Share awards was calculated using the market value of the Common Shares on the date of issuance. The weighted-average grant-date fair value of time-based restricted Common Shares granted during the years ended December 31, 2016, 2015 and 2014 was $13.52 , $11.41 and $11.54 , respectively.  The fair value of the non-vested performance-based restricted Common Share awards with a performance condition requiring the Company to obtain certain earnings per share targets was estimated using the market value of the shares on the date of grant. The fair value of non-vested performance-based restricted Common Share awards with a market condition requiring the Company to obtain a total shareholder return target relative to a group of peer companies was estimated using a Monte Carlo valuation model taking into consideration the probability of achievement using multiple simulations. The awards that use earnings per share as the performance target are expensed beginning when it is probable that the Company will meet the underlying performance condition.   A summary of the status of the Company’s non-vested share units as of December 31, 2016 and the changes during the year then ended, are presented below:    Time-based awards Performance-based awards  Weighted- Weighted-  Common average grant- Common average grant-  Shares date fair value Shares date fair value  Non-vested as of December 31, 2015 731,241 $ 9.45 712,485 $ 10.70  Granted 250,227 $ 13.52 269,255 $ 13.66  Vested (339,963) $ 7.07 (131,033) $ 7.58  Forfeited (29,468) $ 11.82 (25,567) $ 11.30  Non-vested as of December 31, 2016 612,037 $ 12.32 825,140 $ 12.14   As of December 31, 2016, total unrecognized compensation cost related to non-vested time-based share units granted was $2,850 . That cost is expected to be recognized over a weighted-average period of 1.19 years. For the years ended December 31, 2016, 2015 and 2014, the total fair value of awards vested was $5,39 4 , $9,101 and $3,509 , respectively.  As of December 31, 2016, total unrecognized compensation cost related to non-vested performance- based s hare units granted $3,069 for shares probable to vest. That cost is expected to be recognized over a weighted-average period of 1.29 years dependent upon the achievement of performance conditions. As noted above, the Company has issued and outstanding performance-based restricted Common Share awards that use different performance targets (total shareholder return and earnings per share).  The tax benefit realized for the tax deductions from the vesting of restricted Common Shares and option exercises of the share-based payment arrangements was $977 , $0 and $0 for the years ended December 31, 2016, 2015 and 2014.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2016
Employee Benefit Plans [Abstract]
Employee Benefit Plans	8. Employee Benefit Plans  The Company has certain defined contribution profit sharing and 401(k) plans covering substantially all of its employees in the United States and Europe . The Company provides matching contributions to the Company’s 401(k) plan. Company contributions are generally discretionary. For the years ended December 31, 2016, 2015 and 2014, expenses related to these plans amounted to $1,601 , $1,487 and $1,280 , respectively.  The Company previously sponsored a post retirement benefit plan covering certain retirees. There was no remaining liability recorded as of December 31, 2016.  Long-Term Cash Incentive Plan  In March 2009, the Company adopted the Stoneridge, Inc. Long-Term Cash Incentive Plan (the “LTCIP”) and granted awards to certain officers and key employees. Awards under the LTCIP provided recipients with the right to receive cash three years from the date of gr ant depending on the Company’s earnings per share performance for the defined performance period. If the participant voluntarily terminated employment or was discharged for cause, as defined in the LTCIP, the award would be forfeited. In May 2009, the LTCIP was approved by the Company’s shareholders.  The Company granted Phantom Share awards under the LTCIP in 2013 that vest ed in February 2016 and were paid in March 2016 based on the Company’s earnings per share performance for each fiscal year of 2013, 2014 and 2015. As of December 31, 2016 and 2015 , the Company has recorded a liability of $0 and $808 for the performance based awards granted under the LTCIP which was included on the consolidated balance sheet as a component of accrued expenses and other current liabilities. There were no performance based awards granted under the LTCIP during the years ended December 31, 2016 , 2015 or 2014 . 

Financial Instruments and Fair

Financial Instruments and Fair Value Measurements	12 Months Ended
	Dec. 31, 2016
Financial Instruments and Fair Value Measurements [Abstract]
Financial Instruments and Fair Value Measurements	 9. 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 December 31, 2016, 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 2016, 2015 and 2014 include the euro and Mexican peso. In addition, the Company hedged the U.S. dollar against the Swedish krona and euro on behalf of its European subsidiaries in 2016, 2015, and 2014.  These forward contracts were executed to hedge forecasted transactions and were 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 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 consolidated statements of operations as a component of other expense (income) , net.  The Company’s foreign currency forward contracts are designed to offset some of the gains and losses realized on the underlying foreign currency denominated transactions as follows:  Euro-denominated Foreign Currency Forward Contracts  At December 31, 2016 and 2015, the Company held a foreign currency forward contract with an underlying notional amount of $1,601 and $1,647 , respectively, to reduce the exposure related to the Company’s euro-denominated intercomp any loans. This contract expired in January 2017 . The euro-denominated foreign currency forward contract was not designated as a hedging instrument. For the year s ended December 31, 2016, 2015, and 2014, the Company recognized a gain of $57 , $336 and $1,205 , respectively, in the consolidated statements of operations as a component of other expense, net related to the euro-denominated contract .  U.S. dollar-denominated Foreign Currency Forward Contracts – Cash Flow Hedge  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 December 31, 201 5 of $10,007 which expire d ratably on a monthly basis from January 2016 through December 2016. There were no contracts entered into as of December 31, 2016.  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 December 31, 201 5 of $2,421 which expire d ratably on a monthly basis from January 2016 through December 2016. There were no contracts entered into as of December 31, 2016 .  The Company evaluated the effectiveness of the U.S. dollar-denominated foreign currency forward contracts held as of December 31, 2015 and during 2016 and concluded that the hedges were effective.  Mexican peso-denominated Foreign Currency Forward Contracts – Cash Flow Hedge  The Company holds Mexican peso-denominated foreign currency contracts with notional amounts at December 31, 2016 of $5,699 which expire ratably on a monthly basis from January 201 7 through December 2017, compared to $9,780 at December 31, 2015.  The Company evaluated the effectiveness of the Mexican peso-denominated foreign currency forward contracts held as of June 30, 2014. As a result of the sale of the Wiring business, the Company forecasted that it would purchase Mexican pesos to fulfill only two of the five hedge contracts for the period October 2014 through December 2014. As the purchase of Mexican pesos related to three of the five hedge contracts was not probable, these three contracts attributed to the Wiring business were de-designated as of June 30, 2014, and the associated unrecognized $320 gain at that date was reclassified from accumulated other comprehensive loss and recorded in discontinued operations in the Company’s consolidated statements of operations in the quarter and year of de-designation. On August 4, 2014, the three de-designated hedges were terminated and settled resulting in a nominal gain.  The Company evaluated the effectiveness of the Mexican peso-denominated foreign currency forward contracts held as of December 31, 201 6 and 2015, and the years then ended, and concluded that the hedges were effective.  Commodity Price Risk - Cash Flow Hedge  To mitigate the risk of future price volatility and, consequently, fluctuations in gross margins, the Company entered into fixed price commodity contracts with a financial institution to fix the cost of a portion of the Company’s copper purchases. Copper is a raw material used in a number of the Company’s products.  The Company did not have any fixed price commodity contracts at December 31, 201 6 and 201 5 compared to an aggregate notional amount of 317 pounds at December 31, 2014.  The unrealized gain or loss for the effective portion of the hedges were deferred and reported in the Company’s consolidated balance sheets as a component of accumulated other comprehensive loss while the ineffective portion, if any, was reported in the consolidated statements of operations. The effectiveness of the transactions is measured on an ongoing basis using regression analysis and forecasted future copper purchases.  The Company evaluated the effectiveness of the copper fixed price commodity contracts as of June 30, 2014. As a result of the sale of the Wiring business, the Company forecasted that it would not purchase the quantities of copper to fulfill the two contracts for the period August 2014 through March 2015. As the purchase of copper quantities related to these contracts was not probable, the contracts primarily associated with the Wiring segment not expected to be fulfilled were de-designated at June 30, 2014, and the associated unrecognized $77 gain at that date was reclassified from accumulated other comprehensive loss and recorded in discontinued operations in the Company’s consolidated statements of operations in the quarter and year of de-designation.  Interest Rate Risk - Fair Value Hedge  The Company had a fixed-to-floating interest rate swap agreement (the “Swap”) with a notional amount of $45,000 to hedge its exposure to fair value fluctuations on a portion of its senior notes. The Swap was designated as a fair value hedge of the fixed interest rate obligation under the Company’s $175,000 9.5% senior notes. The critical terms of the Swap were aligned with the terms of the senior notes which resulted in no hedge ineffectiveness. The unrealized gain or loss for the effective portion of the hedge was deferred and reported in the Company’s consolidated balance sheets as an asset or liability, as applicable, with the offset to the carrying value of the senior notes.  Under the Swap, the Company paid a variable interest rate equal to the six-month London Interbank Offered Rate (“LIBOR”) plus 7.2% and it received a fixed interest rate of 9.5%. The Swap required semi-annual settlements on April 15 and October 15. The difference between amounts received and paid under the Swap was recognized as a component of interest expense, net in the consolidated statements of operations.  In connection with the Company’s notice of redemption issued on September 15, 2014 to redeem all remaining outstanding senior notes, the interest rate fair value hedge was de-designated on that date. On October 23, 2014, the Company terminated the interest rate swap resulting in a gain of $371 recorded in other expense, net in the consolidated statement of operations in the fourth quarter of 2014.  The Swap reduced interest expense by $641 for the year ended December 31, 2014 .  The notional amounts and fair values of derivative instruments in the consolidated balance sheets were as follows:     Notional Prepaid expenses Accrued expenses and  amounts (A) and other current assets other current liabilities  December 31, December 31, December 31,  2016 2015 2016 2015 2016 2015  Derivatives designated as hedging instruments:  Cash flow hedges:  Forward currency contracts $5,699 $22,208 $ - $474 $28 $84  Derivatives not designated as hedging instruments:  Forward currency contracts $1,601 $1,647 $ - $ - $3 $9  (A) Notional amounts represent the gross contract / notional amount of the derivatives outstanding.  Gross amounts recorded for the cash flow hedges in other comprehensive loss in shareholders’ equity and in net income (loss) for the years ended December 31 were as follows:     Loss recorded Loss reclassified from  in other comprehensive other comprehensive income  income (loss) (loss) into net income (loss)  2016 2015 2014 2016 2015 2014  Derivatives designated as cash flow hedges:  Forward currency contracts $ (582) $ (671) (46) $ (164) $ (1,060) (310)  Fixed price commodity contracts - - (408) - - (256)  Total derivatives designated as cash flow hedges $ (582) $ (671) (454) $ (164) $ (1,060) (566)  Gains and losses reclassified from comprehensive loss into net income (loss) were recognized in cost of goods sold in the Company’s consolidated statements of operations.  The net deferred loss of $ 28 on the cash flow hedge derivatives will be reclassified from other comprehensive loss to the consolidated st atements of operations in 2017. The Company has measured the ineffectiveness of the forward currency and commodity contracts and any amounts recognized in the consolidated financial statements were immaterial for the years ended December 31, 2016, 2015 and 2014.          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 Company did not have any financial assets or liabilities fair valued using Level 1 or Level 3 inputs at December 31, 2016 or 2015. The fair value of financial assets using Level 2 inputs related to forward currency contracts were $0 and $474 at December 31, 2016 and 2015, respectively. The fair value of financial liabilities using Level 2 inputs related to forward currency contracts were $31 and $93 at December 31, 2016 and 2015, respectively.  The Company recorded a non-recurring fair value adjustment of $51,458 related to the PST goodwill during the year ended December 31, 2014. The Company utilized Level 3 inputs to estimate the fair value adjustment for nonfinancial assets. For additional information, see the discussion of Goodwill and Other Intangible Assets in Note 2. No non-recurring fair value adjustments were required for nonfinancial assets for the year s ended December 31, 2016 and 2015.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2016
Commitments and Contingencies [Abstract]
Commitments and Contingencies	10. 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 are probable and reasonably estimable. Although it is not possible to predict with certainty the outcome of these matters, the Company is of the opinion that the ultimate resolution of these matters will not have a material adverse effect on its consolidated results of operations or financial position.  As a result of environmental studies performed at the Company’s former facility located in Sarasota, Florida, the Company became aware of soil and groundwater contamination at this site. The Company engaged an environmental engineering consultant to assess the level of contamination and to develop a remediation and monitoring plan for the site. Soil remediation at the site was completed during the year ended December 31, 2010. As the remedial action plan has been approved by the Florida Department of Environmental Protection, ground water remediation began in the fourth quarter of 2015. During the years ended December 31, 2015, 2014 and 2013, environmental remediation costs incurred were immaterial. At December 31, 2016 and 2015, the Company had accrued an undiscounted liability of $446 and $532 , respectively, related to future remediation. At December 31, 2016 and 2015, $370 and $469 , respectively, were recorded as a component of accrued expenses and other current liabilities on the consolidated balance sheets while the remaining amounts were recorded as a component of other long-term liabilities. A majority of the costs associated with the recorded liability are being incurred during 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 in December 2011, the liability to remediate the site contamination remains the responsibility of the Company. Due to the ongoing site remediation, the closing terms of the sale agreement included a requirement for the Company to maintain a $2,000 letter of credit for the benefit of the buyer.  The Company has a legal proceeding, Verde v. Stoneridge, Inc. et al ., currently pending in the United States District Court for the Eastern District of Texas, Cause No. 6:14-cv-00225- KNM. The plaintiff filed this putative class action against the Company and others on March 26, 2014. Plaintiff alleges that the Company was involved in the vertical chain of manufacture, distribution, and sale of a control device (“CD”) that was incorporated into a Dodge Ram truck purchased by Plaintiff in 2006. Plaintiff alleges that the Company breached express warranties and indemnification provisions by supplying a defective CD that was not capable of performing its intended function. The putative class consists of all Texas residents who own manual transmission Ch rysler vehicles model years 1997 –2007 equipped with the subject CD. Plaintiff seeks recovery of economic loss damages incurred by him and the putative class members associated with inspecting and replacing the allegedly defective CD, as well as attorneys’ fees and costs. Plaintiff filed his motion for class certification seeking to certify a class of Texas residents who own or lease certain automo biles sold by Chrysler from 1997 –2007. Plaintiff alleges this putative class would include approximately 120,000 people. In the motion for class certification, the Plaintiff states that damages are no more than $1 per person. A hearing on Plaintiff’s motion for class certificatio n was held on November 16, 2015. On April 8, 2016, the Magistrate Judge granted the Company’s motion for partial summary judgment dismissing the Plaintiff’s indemnification claim; that ruling was later adopted by the United States District Court. On November 7, 2016, the Magistrate Judge issued a Report and Recommendation Concerning Class certification, in which she recommended denying Plaintiff’s motion for class certification. Plaintiff filed an objection to the Report and Recommendation and motion for reconsideration concerning class certification. The Magistrate’s Report and Recommendation, and plaintiff’s objection and motion for reconsideration are currently before the court pending a ruling from the District Judge. The Company believes the likelihood of loss is not probable or reasonably estimable, and therefore no liability has been recorded for t hese claims at December 31, 2016 .  Royal v. Stoneridge, Inc. et al. is another legal proceeding currently pending in the United States District Court for the Western District of Oklahoma, Cause No. 5:14-cv-01410-F. Plaintiffs filed this putative class action against the Company, Stoneridge Control Devices, Inc., and others on December 19, 2014. Plaintiff alleges that the Company was involved in the vertical chain of manufacture, distribution, and sale of a CD that was incorporated into Dodge Ram trucks purchased by Plaintiff between 1999 and 2006. Plaintiffs allege that the Company and Stoneridge Control Devices, Inc. breached various express and implied warranties, including the implied warranty of merchantability. Plaintiffs also seek indemnity from the Company and Stoneridge Control Devices, Inc. The putative class consists of all owners of vehicles equipped with the subject CD, which includes various Dodge Ram trucks and other manual transmission vehicles manufactured from 1997–2007, which Plaintiffs allege is more than one million vehicles. Plaintiffs seeks recovery of economic loss damages associated with inspecting and replacing the allegedly defective CD, diminished value of the subject CDs and the trucks in which they were installed, and attorneys’ fees and costs. The amount of compensatory or other damages sought by Plaintiffs and the putative class members is unknown. The Company is vigorously defending itself against these allegations, and has and will continue to challenge the claims as well as class action certification. The Company believes the likelihood of loss is not probable or reasonably estimable, and therefore no liability has been recorded for t hese claims at December 31, 2016 .  In September 2013, two legal proceedings were initiated by Actia Automotive (“Actia”) in a French court (the tribunal de grande instance de Paris) alleging infringement of its patents by the Company’s Electronics segment. The euro (“€”) and U.S. dollar equ ivalent (“$”) that Actia wa s seeking has been €7,000 ( $7,400 ) for each claim for injunctive relief and monetary damages resulting from such alleged in fringement. The Company believed that its products did not infringe on any of the patents claimed by Actia, and the claims were without merit. The Company vigorously defended itself against these allegations, and challenged certain Actia patents in the European Patent Office. I n September 2015, the French court ruled in favor of the Company on one claim, which is subject to appeal by Actia. However, on July 28, 2016 the Company reached a settlement with Actia with regard to both claims. Under the settlement agreement the Company agreed to forego a payment by Actia of €50 ( $56 ) that had been ordered by the French Court and Actia agreed (i) not to appeal the French court’s ruling against it on the first claim and (ii) to dismiss its infringement claims against the Company with respect to the second claim. Under the settlement Actia agreed not to enforce any of the patents in question against the Company, or the Company’s successors and assigns. As a result this matter has been settled and no liability has been recorded for these claims at December 31, 2016 .        On May 24, 2013, the State Revenue Services of São Paulo issued a tax deficiency notice against PST claiming that the vehicle tracking and monitoring services it provides should be classified as communication services, and therefore subject to the State Value Added Tax – ICMS. The State Revenue Services assessment imposed the 25.0% ICMS tax on all revenues of PST related to the vehicle tracking and monitoring services during the period from January 2009 through December 2010. The Brazilian real (“R$”) and U.S. dollar equivalent (“$”) of the aggregate tax assessment is approximately R$92,500 ($28,400 ) which is comprised of Value Added Tax – ICMS of R$13,200 ($4,100 ) , interest of R$11,400 ($3,500 ) and penalties of R$67,900 ($20,800 ) . The Company believes that the vehicle tracking and monitoring services are non-communication services, as defined under Brazilian tax law, subject to the municipal ISS tax, not communication services subject to state ICMS tax as claimed by the State Revenue Services of São Paulo. PST has, and will continue to collect the municipal ISS tax on the vehicle tracking and monitoring services in compliance with Brazilian tax law and will defend its tax position. PST has received a legal opinion that the merits of the case are favorable to PST, determining among other things that the imposition on the subsidiary of the State ICMS by the State Revenue Services of São Paulo is not in accordance with the Brazilian tax code. Management believes, based on the legal opinion of the Company’s Brazilian legal counsel and the results of the Brazil Administrative Court's ruling in favor of another vehicle tracking and monitoring company related to the tax deficiency notice it received, the likelihood of loss is not probable although it may take years to resolve. As a result of the above, as of December 31, 2016 and 2015, no accrual has been recorded with respect to this tax assessment. An unfavorable judgment on this issue for the years assessed and for subsequent years could result in significant costs to PST and adversely affect its results of operations. There have been no significant changes to the facts and circumstances related to this notice for the year ended December 31, 201 6 .  In addition, PST has civil, labor and other non-income 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$31 ,800 ( $9,800 ) and R$25,400 ( $6,500 ) at December, 2016 and 2015, respectively. An unfavorable outcome on these contingencies could result in significant cost to PST and adversely affect its results of operations.

Headquarter Relocation

Headquarter Relocation	12 Months Ended
	Dec. 31, 2016
Headquarter Relocation	 12. Restructuring and Business Realignment  On October 29, 2007, the Company announced a restructuring initiative to improve manufacturing efficiency and cost position by ceasing manufacturing operations at its Mitcheldean, United Kingdom (Electronics reportable segment) location. In 2010, the Company continued restructuring initiatives within the Electronics reportable segment and recorded amounts related to its terminated property lease in Mitcheldean, United Kingdom. During the third quarter of 2012, the Company finalized a settlement agreement to modify the terms of and the obligation associated with the property consistent with previous estimates.     In connection with the Electronics segment restructuring initiative, the Company recorded lease related restructuring charges during the years ended December 31, 201 6 , 201 5 and 201 4 of $59 , $183 and $494 , respectively, as part of selling, general and administrative expense. At December 31, 201 6 and 201 5 , the only remaining restructuring related accrual relates to the terminated property lease in Mitcheldean, United Kingdom, for which the Company has accrued $273 and $458 , respectively, on the consolidated balance sheets of which $0 and $313 , respectively, is a component of other long-term liabilities.  The expenses for the restructuring activities that relate to the Electronics reportable segment include the following:     2016 2015 2014  Accrued balance at January 1 $ 458 $ 733 $ 780  Charge to expense 59 183 494  Foreign currency translation (69) 3 (45)  Cash payments, net (175) (461) (496)  Accrued balance at December 31 $ 273 $ 458 $ 733  The Company regularly evaluates the performance of its businesses and cost structures, including personnel, and makes necessary changes thereto in order to optimize its results. The Company also evaluates the required skill sets of its personnel and periodically makes strategic changes. As a consequence of these actions, the Company incurs severance related costs which are referred to as business realignment charges.  Business realignment charges by reportable segment were as follows:    Years ended December 31 2016 2015 2014  Electronics (A) $ 1,180 $ 317 $ -  PST (B) 1,437 403 1,578  Unallocated Corporate (C) - 309 -  Total business realignment charges $ 2,617 $ 1,029 $ 1,578  (A) Severance costs for the year ended December 31, 2016 related to selling, general and administrat ive (“SG&A”) and design and development (“D&D”) were $196 and $984 , respectively. Severance costs for the year ended December 31, 2015 related to SG&A and D&D were $102 and $215 , respectively.  (B) Severance costs for the year ended December 31, 2016 related to cost of goods sold (“COGS”), SG&A and D&D were $437 , $884 and $116 , respectively. Severance costs for the year ended December 31, 2015 related to COGS, SG&A and D&D were $172 , $117 and $114 , respectively. Severance costs for year ended December 31, 2014 related to COGS, SG&A and D&D were $847 , $559 and $172 , respectively.  (C) Severance costs for the year then ended December 31, 2015 related to SG&A were $309 .  Business realignment charges classified by statement of operations line item were as follows:     Years ended December 31 2016 2015 2014  Cost of goods sold $ 437 $ 172 $ 847  Selling, general and administrative 1,080 528 559  Design and development 1,100 329 172  Total business realignment charges $ 2,617 $ 1,029 $ 1,578  There were no significant restructuring or business realignment expenses related to the Control Devices reportable segment during the years ended December 31, 201 6 , 201 5 or 201 4 .
Headquarter Relocation [Member]
Headquarter Relocation	11. Headquarter Relocation and Consolidation  D uring the fourth quarter of 2016 , the Company relocated its corporate headquarters from Warren, Ohio to Novi, Michigan and consolidated its other corporate functions into one location . As a result, the Company incurred relocation costs , which included employee retention, relocation, severance, recruiting, duplica te wages and professional fees, of $1,769 for the year then ended December 31, 2016 .  During 2016, Company entered into a long-term lease agreement for its new corporate headquarters. The Company establishes assets and liabilities for the estimated construction costs incurred under build-to-suit lease arrangements to the extent the Company was involved in the construction of structural improvements or takes construction risk prior to the commencement of a lease. As of September 30 , 2016, the Company recorded a non-cash build-to-suit lease asset under construction of $4,322 (within Prepaid and other currents assets) and a corresponding obligation (within accrued expenses and other current liabilities) in the consolidated balance sheet. On October 31, 2016 the construction was completed. Based on the Company’s evaluation of the lease, sale and leaseback accounting treatment was deemed to be appropriate and as such the Company removed the build-to-suit lease asset and corresponding obligation. Also, the incremental cost of the tenant improvements incurred and paid by the Lessor of $1,104 were capitalized as a right of use asset and corresponding liability as of October 31, 2016. The right of use asset and corresponding liability will be amortized on a straight line basis to rent expense over the 10 lease year term. 

Restructuring and Business Real

Restructuring and Business Realignment	12 Months Ended
	Dec. 31, 2016
Restructuring and Business Realignment [Abstract]
Restructuring and Business Realignment	 12. Restructuring and Business Realignment  On October 29, 2007, the Company announced a restructuring initiative to improve manufacturing efficiency and cost position by ceasing manufacturing operations at its Mitcheldean, United Kingdom (Electronics reportable segment) location. In 2010, the Company continued restructuring initiatives within the Electronics reportable segment and recorded amounts related to its terminated property lease in Mitcheldean, United Kingdom. During the third quarter of 2012, the Company finalized a settlement agreement to modify the terms of and the obligation associated with the property consistent with previous estimates.     In connection with the Electronics segment restructuring initiative, the Company recorded lease related restructuring charges during the years ended December 31, 201 6 , 201 5 and 201 4 of $59 , $183 and $494 , respectively, as part of selling, general and administrative expense. At December 31, 201 6 and 201 5 , the only remaining restructuring related accrual relates to the terminated property lease in Mitcheldean, United Kingdom, for which the Company has accrued $273 and $458 , respectively, on the consolidated balance sheets of which $0 and $313 , respectively, is a component of other long-term liabilities.  The expenses for the restructuring activities that relate to the Electronics reportable segment include the following:     2016 2015 2014  Accrued balance at January 1 $ 458 $ 733 $ 780  Charge to expense 59 183 494  Foreign currency translation (69) 3 (45)  Cash payments, net (175) (461) (496)  Accrued balance at December 31 $ 273 $ 458 $ 733  The Company regularly evaluates the performance of its businesses and cost structures, including personnel, and makes necessary changes thereto in order to optimize its results. The Company also evaluates the required skill sets of its personnel and periodically makes strategic changes. As a consequence of these actions, the Company incurs severance related costs which are referred to as business realignment charges.  Business realignment charges by reportable segment were as follows:    Years ended December 31 2016 2015 2014  Electronics (A) $ 1,180 $ 317 $ -  PST (B) 1,437 403 1,578  Unallocated Corporate (C) - 309 -  Total business realignment charges $ 2,617 $ 1,029 $ 1,578  (A) Severance costs for the year ended December 31, 2016 related to selling, general and administrat ive (“SG&A”) and design and development (“D&D”) were $196 and $984 , respectively. Severance costs for the year ended December 31, 2015 related to SG&A and D&D were $102 and $215 , respectively.  (B) Severance costs for the year ended December 31, 2016 related to cost of goods sold (“COGS”), SG&A and D&D were $437 , $884 and $116 , respectively. Severance costs for the year ended December 31, 2015 related to COGS, SG&A and D&D were $172 , $117 and $114 , respectively. Severance costs for year ended December 31, 2014 related to COGS, SG&A and D&D were $847 , $559 and $172 , respectively.  (C) Severance costs for the year then ended December 31, 2015 related to SG&A were $309 .  Business realignment charges classified by statement of operations line item were as follows:     Years ended December 31 2016 2015 2014  Cost of goods sold $ 437 $ 172 $ 847  Selling, general and administrative 1,080 528 559  Design and development 1,100 329 172  Total business realignment charges $ 2,617 $ 1,029 $ 1,578  There were no significant restructuring or business realignment expenses related to the Control Devices reportable segment during the years ended December 31, 201 6 , 201 5 or 201 4 .

Segment Reporting

Segment Reporting	12 Months Ended
	Dec. 31, 2016
Segment Reporting [Abstract]
Segment Reporting	13. Segment Reporting  Operating segments are defined as components of an enterprise that are evaluated regularly by the Company's chief operating decision maker in deciding how to allocate resources and in assessing performance. The Company's chief operating decision maker is the chief executive officer. During the third quarter of 2014 the Company sold its Wiring business segment, which designed and manufactured wiring harness products and assembled instrument panels for sale principally to the commercial, agricultural and off-highway vehicle markets. As such, for all periods presented the Company reported this business as discontinued operations in the Company’s consolidated financial statements and therefore excluded it from the segment disclosures herein. See Note 2 for additional details. The Company has three reportable segments, Control Devices, Electronics and PST, which also represent its operating segments. The Control Devices reportable segment produces sensors, switches, valves and actuators. The Electronics reportable segment produces electronic instrument clusters, electronic control units and driver information systems. 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. The Company’s management evaluates the performance of its reportable segments based primarily on revenues from external customers, capital expenditures 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:    Years ended December 31 2016 2015 2014  Net Sales:  Control Devices $ 408,132 $ 333,010 $ 306,658  Inter-segment sales 1,826 2,055 3,080  Control Devices net sales 409,958 335,065 309,738   Electronics 205,256 216,544 214,141  Inter-segment sales 33,361 22,904 35,163  Electronics net sales 238,617 239,448 249,304   PST 82,589 95,258 139,780  Inter-segment sales - - -  PST net sales 82,589 95,258 139,780   Eliminations (35,187) (24,959) (38,243)  Total net sales $ 695,977 $ 644,812 $ 660,579  Operating Income (Loss):  Control Devices $ 61,815 $ 44,690 $ 35,387  Electronics 14,798 13,784 17,444  PST (3,462) (7,542) (59,587)  Unallocated Corporate (A) (29,069) (23,117) (19,067)  Total operating income (loss) $ 44,082 $ 27,815 $ (25,823)  Depreciation and Amortization:  Control Devices $ 10,276 $ 9,260 $ 9,545  Electronics 3,971 3,666 4,432  PST 8,559 9,272 12,998  Unallocated Corporate 452 211 130  Total depreciation and amortization (B) $ 23,258 $ 22,409 $ 27,105  Interest Expense, net:  Control Devices $ 226 $ 326 $ 303  Electronics 142 161 695  PST 3,396 2,957 2,764  Unallocated Corporate 2,513 2,921 13,118  Total interest expense, net $ 6,277 $ 6,365 $ 16,880  Capital Expenditures:  Control Devices $ 13,261 $ 15,094 $ 13,658  Electronics 5,665 6,538 3,541  PST 3,213 5,889 6,161  Unallocated Corporate (C) 2,337 1,214 156  Total capital expenditures $ 24,476 $ 28,735 $ 23,516      December 31, December 31,  2016 2015  Total Assets:  Control Devices $ 150,623 $ 127,649  Electronics 99,964 97,443  PST 107,405 100,143  Corporate (C) 287,031 288,806  Eliminations (250,494) (249,789)  Total assets $ 394,529 $ 364,252     (A) Unallocated Corporate expenses include, among other items, accounting, finance, legal, information technology costs as well as share-based compensation.  (B) These amounts represent depreciation and amortization on property, plant and equipment and certain intangible assets.  (C) Corporate assets consist primarily of cash, intercompany loan receivables, capital expenditures for the new headquarter building, equity investments and investments in subsidiaries.  The following table presents net sales and long-term assets for the geographic areas in which the Company operates:   2016 2015 2014   Net Sales:  North America $ 428,046 $ 369,032 $ 330,516  South America 82,589 95,258 139,780  Europe and Other 185,342 180,522 190,283  Total net sales $ 695,977 $ 644,812 $ 660,579    December 31, December 31,  2016 2015   Long-term Assets:  North America $ 73,835 $ 60,099  South America 63,497 56,943  Europe and Other 16,304 15,301  Total long-term assets $ 153,636 $ 132,343 

Unaudited Quarterly Financial D

Unaudited Quarterly Financial Data	12 Months Ended
	Dec. 31, 2016
Unaudited Quarterly Financial Data [Abstract]
Unaudited Quarterly Financial Data	  14. Unaudited Quarterly Financial Data  The following is a summary of quarterly results of operations:    Quarter ended  2016 December 31 September 30 June 30 March 31  Net sales $ 172,612 $ 173,846 $ 186,903 $ 162,616  Gross profit 47,779 49,748 52,751 45,161  Operating income 10,170 11,780 13,626 8,506  Income tax expense (benefit) from continuing operations (B) (39,503) 919 1,350 845  Income from continuing operations 48,489 9,981 10,995 6,109  Net income 48,489 9,981 10,995 6,109  Net income (loss) attributable to noncontrolling interests 122 (303) (576) (1,130)  Net income attributable to Stoneridge, Inc. 48,367 10,284 11,571 7,239  Earnings per share from continuing operations  attributable to Stoneridge, Inc.:  Basic (A) $ 1.74 $ 0.37 $ 0.42 $ 0.26  Diluted (A) $ 1.70 $ 0.36 $ 0.41 $ 0.26  Earnings per share attributable to Stoneridge, Inc.:  Basic (A) $ 1.74 $ 0.37 $ 0.42 $ 0.26  Diluted (A) $ 1.70 $ 0.36 $ 0.41 $ 0.26   Quarter ended  2015 December 31 September 30 June 30 March 31  Net sales $ 154,641 $ 162,057 $ 165,289 $ 162,825  Gross profit 42,239 45,145 45,946 43,648  Operating income 8,327 8,947 7,415 3,126  Income tax expense (benefit) from continuing operations (345) 32 (381) 147  Income from continuing operations 4,935 7,411 6,328 2,103  Income (loss) from discontinued operations (C) 16 (113) 55 (168)  Net income 4,951 7,298 6,383 1,935  Net loss attributable to noncontrolling interests (1,133) (69) (596) (409)  Net income attributable to Stoneridge, Inc. 6,084 7,367 6,979 2,344  Earnings per share from continuing operations  attributable to Stoneridge, Inc.:  Basic (A) $ 0.22 $ 0.27 $ 0.26 $ 0.10  Diluted (A) $ 0.22 $ 0.27 $ 0.25 $ 0.09  Earnings (loss) per share attributable to discontinued  operations:  Basic (A) $ 0.00 $ (0.01) $ 0.00 $ (0.01)  Diluted (A) $ 0.00 $ (0.01) $ 0.00 $ (0.01)  Earnings per share attributable to Stoneridge, Inc.:  Basic (A) $ 0.22 $ 0.26 $ 0.26 $ 0.09  Diluted (A) $ 0.22 $ 0.26 $ 0.25 $ 0.08  (A) Earnings per share for the year may not equal the sum of the four historical quarters earnings per share due to changes in weighted-average basic and diluted shares outstanding.  (B) The Company recorded the re lease of a valuation allo wance associated with its U.S. f ederal, certain state and foreign deferred tax assets for the year ended December 31, 2016.  (C) A gain (loss) on disposal of the Wiring business was recorded for the quarters ended March 31, 2015, June 30, 2015, September 30, 2015 and December 31, 2015 for $(168) , $55 , $(113) and $16, respectively .

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2016
Subsequent Events [Abstract]
Subsequent Events	15. Subsequent Events  Orlaco Acquisition  On January 31, 2017 , Stoneridge B.V., an indirect wholly-owned subsidiary of Stoneridge, Inc., entered into an agreement to acquire all of Wide-Angle Management B.V. and Exploitatiemaatschappij Berghaaf B.V. (“Orlaco”). Orlaco designs, manufactures and sells a wide variety of innovative camera-based vision systems, monitors and related products primarily to the heavy off-road machinery, commercial on-road vehicle, lifting crane and warehousing and logistics industries. Since July 2015, Stoneridge and Orlaco have jointly developed the MirrorEye mirror replacement system, which is the industry-leading solution to improve the safety and fuel economy of commercial vehicles. The MirrorEye system integrates Orlaco’s camera technology and Stoneridge’s driver information capabilities as well as the combined software capabilities of both companies. The acquisition of Orlaco enhances Stoneridge’s global technical capabilities in vision systems and facilitates entry into new markets.  The aggregate consideration for the Orlaco acquisition was €74,939 ( $79,675 ), which included customary estimated adjustments to the purchase price. The Company paid €67,439 ( $71,701 ) in cash, and €7,500 ( $7,974 ) to hold in an escrow account to secure the payment obligations of the seller under the terms of the purchase agreement. The purchase price is subject to certain customary adjustments set forth in the purchase agreement. The Company expects to transfer the escrow amount promptly following the completion of the escrow period. The Company may also be required pay up to an additional €7.5 million in cash as earnout consideration if certain targets are achieved during the first two years. In order to fund the Orlaco acquisition, the Company borrowed $81.0 million under its Credit Facility.  Consent and Amendment No. 4 to Third Amended and Restated Credit Agreement On January 30, 2017 , the Company entered into a Consent and Amendment No. 4 (“Amendment No. 4 ”) to the Credit Facility. Amendment No. 4 amended certain definitions, schedules and exhibits of the Credit Agreement, consented to the Dutch r eorganization , and consented to the Orlaco acquisition. 

SCHEDULE II - VALUATION AND QUA

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS	12 Months Ended
	Dec. 31, 2016
Valuation and Qualifying Accounts [Abstract]
Valuation and Qualifying Accounts	                      SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS  (in thousands)   The following schedules provide the activity for accounts receivable reserves and valuation allowance for deferred tax assets from  continuing operations for the years ended December 31, 2016, 2015 and 2014:   Balance at Charged to  beginning of costs and Balance at  period expenses Write-offs end of period  Accounts receivable reserves:  Year ended December 31, 2014 $ 2,625 $ 619 $ (1,227) $ 2,017  Year ended December 31, 2015 2,017 395 (1,346) 1,066  Year ended December 31, 2016 1,066 1,604 (1,040) 1,630   Exchange  Net additions rate  Balance at charged to fluctuations  beginning of income and other Balance at  period (expense) items end of period  Valuation allowance for deferred tax assets:  Year ended December 31, 2014 $ 71,827 $ (2,786) $ (1,134) $ 67,907  Year ended December 31, 2015 67,907 (7,957) (559) 59,391  Year ended December 31, 2016 59,391 (47,659) (A) (607) 11,125    (A) The Company recorded the release of a valuation allowan ce associated with its U.S. f ederal , certain state and foreign deferred tax assets of $49.6 million. 

Summary of Significant Accoun24

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2016
Summary of Significant Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation  The accompanying consolidated financial statements include the accounts of Stoneridge, Inc. and its wholly-owned and majority-owned subsidiaries (collectively, the “Company”). Intercompany transactions and balances have been eliminated in consolidation. The Company analyzes its ownership interests in accordance with Accounting Standards Codification (“ASC”) “Consolidations (Topic 810)” to determine whether they are a variable interest entity and, if so, whether the Company is the primary beneficiary.  The Company’s investment in Minda Stoneridge Instruments Ltd. (“Minda”) for the years ended December 31, 2016, 2015 and 2014 has been determined to be an uncons olidated entity, and therefore is accounted for under the equity method of accounting based on our 49% ownership.  The Company had a 74% controlling interest in PST Eletrônica Ltda. (“ PST”) for the years ended December 31, 2016, 2015 and 2014 which i s accounted for a consolidated subsidiary.  The Company sold substantially all of the assets and liabilities of its Wiring business on August 1, 2014. As a result, the Wiring business has been classified as discontinued operations for all periods presented in the Company’s financial statements herein, and therefore has been excluded from both continuing operations and segment results for all periods presented. The Wiring business designed and manufactured wiring harness products and assembled instruments panels for sale principally to the commercial, agricultural and off-highway vehicle markets. 
Accounting Estimates	Accounting Estimates  The preparation of financial statements in conformity with U.S. Generally Accepted Accounting Principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, including certain self-insured risks and liabilities, disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Because actual results could differ from those estimates, the Company revises its estimates and assumptions as new information becomes available.
Cash and Cash Equivalents	Cash and Cash Equivalents  The Company’s cash and cash equivalents are actively traded money market funds with short-term investments in marketable securities, primarily U.S. government securities. Cash and cash equivalents are stated at cost, which approximates fair value, due to the highly liquid nature and short-term duration of the underlying securities with original maturities of 90 days or less .
Accounts Receivable and Concentration Of Credit Risk	Accounts Receivable and Concentration of Credit Risk  Revenues are principally generated from the automotive, commercial, motorcycle, off-highway and agricultural vehicle markets. The Company’s largest customers are Ford Motor Company, General Motors Company and Scania Group, primarily related to the Control Devices and Electronics reportable segments and accounted for the following percentages of consolidated net sales for the years ended December 31, 2016, 2015 and 2014:    2016 2015 2014  Ford Motor Company 17 % 14 % 11 %  General Motors Company 7 % 5 % 5 %  Scania Group 6 % 7 % 8 %  Accounts receivable are recorded at the invoice price, net of an estimate of allowance for doubtful accounts and other reserves. 
Allowance for Doubtful Accounts	 Al lowance for Doubtful Accounts  The Company evaluates the collectability of accounts receivable based on a combination of factors. In circumstances where the Company is aware of a specific customer’s inability to meet its financial obligations, a specific allowance for doubtful accounts is recorded against amounts due to reduce the net recognized receivable to the amount the Company reasonably believes will be collected. Additionally, the Company reviews historical trends for collectability in determining an estimate for its allowance for doubtful accounts. If economic circumstances change substantially, estimates of the recoverability of amounts due to the Company could be reduced by a material amount. The Company does not have collateral requirements with its customers.
Sales of Accounts Receivable	Sales of Accounts Receivable  The Company’s PST segment sells selected accounts receivable on a full recourse basis to an unrelated financial institution in Brazil. PST accounts for these transactions as sales of accounts receivable. As such, in accordance with ASC 860, “Transfers and Servicing”, the sales of accounts receivable are reflected as a reduction of accounts receivable in the consolidated balance sheets and the loss on sale is recorded within interest expense, net in the consolidated statements of operations while the proceeds received from the sale are included in the cash flows from operating activities in the consolidated statements of cash flows.  During 2016 PST sold $15,297 ( 53,886 Brazilian real) of accounts receivable at a loss of $459 ( 1,615 Brazilian real), which represents the implicit interest on the transaction, and received proceeds of $14,838 ( 52,271 Brazilian real). PST had a remaining credit exposure of $1,067 ( 3,476 Brazilian real) at December 31, 2016 related to the receivables sold for which payment from the customer was not yet due.  During 2015 PST sold $6,401 ( 24,994 Brazilian real ) of accounts receivable at a loss of $156 ( 540 Brazilian real), which represents the implicit interest on the transaction, and received proceeds of $6,245 ( 24,454 Brazilian real ).
Inventories	Inventories  Inventories are valued at the lower of cost (using either the first-in, first-out (“FIFO”) or average cost methods) or market. 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 consist of the following:    As of December 31 2016 2015  Raw materials $ 35,665 $ 36,021  Work-in-progress 7,483 7,162  Finished goods 16,969 17,826  Total inventories, net $ 60,117 $ 61,009  Inventory valued using the FIFO method was $37,765 and $ 35,378 at December 31, 2016 and 2015, respectively. Inventory valued using the average cost method was $22,352 and $ 25,631 at December 31, 2016 and 2015, respectively.
Pre-Production Costs Related to Long-Term Supply Arrangements	 Pre-production Costs Related to Long-term Supply Arrangements  Engineering, research and development and other design and development costs for products sold on long-term supply arrangements are expensed as incurred unless the Company has a contractual guarantee for reimbursement from the customer. Costs for molds, dies and other tools used to make products sold on long-term supply arrangements for which the Company either has title to the assets or has the noncancelable right to use the assets during the term of the supply arrangement are capitalized in property, plant and equipment and amortized to cost of sales over the shorter of the term of the arrangement or over the estimated useful lives of the assets, typically three to five years. Costs for molds, dies and other tools used to make products sold on long-term supply arrangements for which the Company has a contractual guarantee to a lump sum reimbursement from the customer are capitalized either as a component of prepaid expenses and other current assets or an investment and other long term asset within the consolidated balance sheets. Capitalized pre-production costs were $6,859 an d $9,405 at December 31, 2016 and 2015 , respectively. At December 31, 2016 and 2015, $6,446 and $9,405 were recorded as a component of prepaid expenses and other current assets on the consolidated balance sheets while the remaining amounts were recorded as a component of investments and other long term assets. 
Discontinued Operations	Discontinued Operations Wiring Business On May 26, 2014, the Company entered into an asset purchase agreement to sell substantially all of the assets and liabilities of the former Wiring segment to Motherson Sumi Systems Ltd., an India-based manufacturer of diversified products for the global automotive industry and a limited company incorporated under the laws of the Republic of India, and MSSL (GB) LIMITED, a limited company incorporated under the laws of the United Kingdom (collectively, “Motherson”), for $65,700 in cash and the assumption of certain related liabilities of the Wiring business. On August 1, 2014, the Company completed the sale of substantially all of the assets and liabilities of its Wiring business to Motherson for $71,386 in cash that consisted of the stated purchase price and estimated working capital on the closing date. The final purchase price was subject to post-closing working capital and other adjustments. Upon the final resolution of the working capital and other adjustments in the second quarter of 2015, the Company returned $1,230 in cash to Motherson.  The Company recorded a loss on disposal, net of tax of $8,576 for the year ended December 31, 2014 which included the recognition of previously deferred foreign currency translation of $2,734 , income tax on the sale of Wiring’s Mexican businesses of $1,621 and transaction costs of $1,384 . The Company also entered into short-term transition services agreements with Motherson substantially all of which concluded in the second quarter of 2015 associated with information systems, accounting, administrative, occupancy and support services as well as contract manufacturing and production support in Estonia. The Company had post-disposition sales to the Wiring business acquired by Motherson of $19 ,766 , $26,952 and $12,230 for the years ended December 31, 2016, 2015, and 2014, respectively. The Company had post-disposition purchases from the Wiring business acquired by Motherson of $425 , $689 and $269 for the years ended December 31, 2016, 2015 and 2014, respectively. The amounts related to 2014 cover the period from August through December 2014 because the sale of the Wiring business occurred on August 1, 2014.  The following tables display summarized activity in our consolidated statements of operations for discontinued operations during the years ended December 31, 2015 and 2014, related to the Wiring business. There were no discontinued operations for the year ended December 31, 2016.     Years ended December 31 2015 2014 (A)   Net sales $ - $ 167,434  Cost of goods sold (C) - 154,787  Selling, general and administrative (C) - 12,697  Interest expense, net - 69  Other expense (income), net - (58)  Loss from operations of discontinued  operations before income taxes (C) - (61)  Income tax expense on discontinued operations - (750)  Loss from discontinued operations, net of tax - (811)   Loss on disposal (B) $ (241) $ (6,955)  Income tax expense on gain (loss) on disposal (D) 31 (1,621)  Loss on disposal, net of tax (210) (8,576)   Loss from discontinued operations $ (210) $ (9,387)  (A) The operations of the Wiring business were presented only for the seven months ended July 31, 2014 because the sale was completed on August 1, 2014.  (B) Included in loss on disposal for the years ended December 31, 2015 and 2014 were transaction costs of $223 and $1,384 , respectively. The loss on disposal also includes a working capital and other adjustments of $18 for the year ended December 31, 2015. In addition, the loss on disposal included $2,734 in previously deferred foreign currency translation for the year ended December 31, 2014.  (C) The assets and liabilities of the Wiring business were reclassified as held for sale effective May 26, 2014. Accordingly, depreciation and amortization for the related Wiring assets were not recorded after that date.  (D) Gains and losses from foreign currency remeasurement related to income taxes were included as a component of income tax (expense) benefit.     Years ended December 31 2014  Depreciation and amortization $ 2,111  Capital expenditures 1,238  Predisposition intercompany sales to the Wiring business were $17,448 for the seven month period ended July 31, 2014. Predisposition intercompany purchases from the Wiring business were $4,025 for the seven month period ended July 31, 2014 .
Property, Plant and Equipment	 P roperty, Plant and Equipment  Property, plant and equipment are recorded at cost and consist of the following:     As of December 31 2016 2015  Land and land improvements $ 3,376 $ 3,538  Buildings and improvements 32,271 32,904  Machinery and equipment 180,944 160,721  Office furniture and fixtures 6,813 6,541  Tooling 67,261 68,101  Information technology 23,632 24,035  Vehicles 398 422  Leasehold improvements 2,583 2,581  Construction in progress 16,854 23,914  Total property, plant, and equipment 334,132 322,757  Less: accumulated depreciation (242,632) (237,493)  Property, plant and equipment, net $ 91,500 $ 85,264  Depreciation is provided using the straight-line method over the estimated useful lives of the assets. Depreciation expense for the years ended December 31, 2016, 2015 and 2014 was $19,998 , $18,964 and $22,299 , respectively. Depreciable lives within each property classification are as follows:     Buildings and improvements 10 -40 years  Machinery and equipment 3 -10 years  Office furniture and fixtures 3 -10 years  Tooling 2 -5 years  Information technology 3 -5 years  Vehicles 3 -5 years  Leasehold improvements shorter of lease term or 3-10 years  Maintenance and repair expenditures that are not considered improvements and do not extend the useful life of the property, plant and equipment are charged to expense as incurred. Expenditures for improvements and major renewals are capitalized. When assets are retired or otherwise disposed of, the related cost and accumulated depreciation are removed from the accounts, and any gain or loss on the disposition is recorded in the consolidated statements of operations as a component of selling, general and administrative expenses.
Impairment of Long-Lived or Finite-Lived Assets	 Impairment of Long-Lived or Finite-Lived Assets  The Company reviews the carrying value of its long-lived assets and finite-lived intangible assets for impairment when events or circumstances indicate that their carrying value may not be recoverable. Factors the Company considers important that could trigger testing of the related asset groups for an impairment include current period operating or cash flow losses combined with a history of operating or cash flow losses, a projection or forecast that demonstrates continuing losses, significant adverse changes in the business climate within a particular business or current expectations that a long-lived asset will be sold or otherwise disposed of significantly before the end of its estimated useful life. To test for impairment, the estimated undiscounted cash flows expected to be generated from the use and disposal of the asset or asset group is compared to its carrying value. An asset group is established by identifying the lowest level of cash flows generated by the group of assets that are largely independent of cash flows of other assets. If cash flows cannot be separately and independently identified for a single asset, we will determine whether an impairment has occurred for the group of assets for which we can identify projected cash flows. If these undiscounted cash flows are less than their respective carrying values, an impairment charge would be recognized to the extent that the carrying values exceed estimated fair values. The estimation of undiscounted cash flows and fair value requires us to make assumptions regarding future operating results over the life of the asset or the life of the primary asset in the asset group. The results of the impairment testing are dependent on these estimates which require judgment. The occurrence of certain events, including changes in economic and competitive conditions, could impact cash flows eventually realized and management’s ability to accurately assess whether an asset is impaired.  Due to the lower actual and forecasted financial results from weakness in the Brazilian economy and automotive market, the Company performed an evaluation of PST’s long-lived assets in 2016 , and concluded that the carrying amount of the asset group was recoverable as the undiscounted cash flows of the asset group exceeded its carrying amount.
Goodwill and Other Intangible Assets	 Goodwill and Other Intangible Assets  Goodwill  The total purchase price associated with acquisitions is allocated to the acquisition date fair values of identifiable assets acquired and liabilities assumed with the excess purchase price assigned to goodwill. Goodwill is subject to an annual assessment for impairment (or more frequently if impairment indicators arise) by applying a fair value-based test.  The Company recorded goodwill related to the acquisition of controlling interest in PST in 2011, all of which was deemed to be impaired in 2014. The remaining goodwill balance at December 31, 2016 and 2015 relates to the acquisition of two European aftermarket distributors, which is included within the Electronics segment.  The carrying amount of goodwill related to our Electronics segment decreased by $50 for the year ended December 31, 2016 to $931 due to foreign currency translation. The carrying amount of goodwill related to our Electronics segment decreased by $97 for the year ended December 31, 201 5 to $981 due to foreign currency translation.  Goodwill and changes in the carrying amount of goodwill by segment for the year then ended December 31, 2014 was as follows:      Electronics PST Total  Balance at January 1, 2014 $ 604 $ 53,744 $ 54,348  Acquisition of aftermarket business 664 - 664  Goodwill impairment - (51,458) (51,458)  Currency translation (190) (2,286) (2,476)  Balance at December 31, 2014 $ 1,078 $ - $ 1,078  The Company’s cumulative goodwill impairment loss since inception was $300,083 at December 31, 2016 and 2015. In addition to PST’s 2014 goodwill impairment, the cumulative goodwill impairment loss includes the goodwill impairment recorded by the Company’s Control Devices segment in 2008 and 2004.   PST Goodwill Impairment Assessments During the second quarter of 2014, indicators of potential impairment required the Company to conduct an interim impairment test for its majority owned subsidiary, PST . Those indicators included a decline in recent operating results and lower growth expectations primarily due to the weakening of the Brazilian economy and automotive market. In accordance with ASC 350, the Company completed “step one” of the impairment analysis and concluded that, as of June 30, 2014, the fair value of the PST reportable segment was below its carrying value, including goodwill. As a result, “step two” of the impairment test was initiated in accordance with ASC 350. The Company recorded its best estimate of $29,300 as a non-cash goodwill impairment charge (of which $6,436 was attributable to noncontrolling interest) as of June 30, 2014. Based on the Company’s completed “step two” analysis in the third quarter of 2014, the final goodwill impairment as of June 30, 2014 was $23,498 (of which $5,162 was attributable to noncontrolling interest). As such, the Company recorded an adjustment to reduce the goodwill impairment by $5,802 (of which $1,274 was attributable to noncontrolling interest) as of September 30, 2014.  In the fourth quarter of 2014, the Company conducted its annual goodwill impairment test for PST and completed “step one” of the impairment test concluding that as of October 1, 2014 the fair value of the PST reportable segment was less than its carrying value, including goodwill. PST’s fair value decreased further due to significantly lower sales and earnings growth expectations which were a result of lower forecasted growth in the Brazilian economy and automotive market and a forecasted decline in currency exchange rates thereby increasing PST’s material costs. Based on the completed “step two” analysis, a goodwill impairment charge of $27,960 (of which $6,142 was attributable to noncontrolling interest) was recorded in the fourth quarter of 2014 which represented all of the remaining PST goodwill. The aggregate goodwill impairment for the year ended December 31, 2014 was $51,458 (of which $11,304 was attributable to noncontrolling interest).  The fair value measurement of the reporting unit under the “step one” analysis and the “step two” analysis (a non-recurring fair value measure) in their entirety are classified as Level 3 inputs. The estimates and assumptions underlying the fair value calculations used in the Company's impairment test are uncertain by their nature and can vary significantly from actual results. Factors that management must estimate include, but are not limited to, industry and market conditions, sales volume and pricing, raw material costs, capital expenditures, working capital changes, cost of capital, debt-equity mix and tax rates. The estimates and assumptions that most significantly affect the fair value calculation are sales volume and the associated cash flow assumptions, market growth and weighted average cost of capital. The estimates and assumptions used in the estimate of fair value are consistent with those the Company uses in its internal planning.  The “step two” of the PST goodwill impairment test utilized the following methodologies in determining fair value. Buildings and machinery were valued at an estimated replacement cost for an asset of comparable age and condition. PST finite lived identified intangible assets are customer relationships, tradenames and technology. Customer relationships were valued using an excess earnings method, using various inputs such as the estimated customer attrition rate, future earnings forecast, the amount of contributory asset charges, and a discount rate. Tradenames and technology intangibles are valued using a relief from royalty method, which is based upon comparable market royalty rates for tradenames of similar value. Other working capital items are generally recorded at carrying value, unless there were known conditions that would impact the ultimate settlement amount of a particular item.  Other Intangible Assets  Other intangible assets, net at December 31, 2016 and 2015 consisted of the following:     Acquisition Accumulated  As of December 31, 2016 cost amortization Net  Customer lists $ 27,476 $ (9,138) $ 18,338  Tradenames 18,116 (4,558) 13,558  Technology 10,862 (3,498) 7,364  Other 41 (41) -  Total $ 56,495 $ (17,235) $ 39,260     Acquisition Accumulated  As of December 31, 2015 cost amortization Net  Customer lists $ 23,003 $ (6,101) $ 16,902  Tradenames 15,129 (3,043) 12,086  Technology 9,066 (2,336) 6,730  Other 34 (34) -  Total $ 47,232 $ (11,514) $ 35,718  Other intangible assets, net at December 31, 2016 include customer lists, tradenames and technology of $18,083 , $13,554 and $7 ,364 , respectively, related to the PST segment with the remaining amounts related to the Electronics segment.  The Company recognized $3,259 , $3,445 and $ 4,784 of amortization expense in 2016, 2015 and 2014, respectively. Amortization expense is included as a component of selling, general and administrative on the consolidated statements of operations. Annual a mortization expense for intangible assets is estimated to be approximately $3,200 for the years 2017 through 202 1 . The weighted-average remaining amortization period is approximately 12 years. 
Accrued Expenses and Other Current Liabilities	 Accrued Expenses and Other Current Liabilities  Accrued expenses and other current liabilities consist of the following:     As of December 31 2016 2015  Compensation related liabilities $ 16,329 $ 17,878  Product warranty and recall obligations 6,727 4,446  Other (A) 18,433 16,596  Total accrued expenses and other current liabilities $ 41,489 $ 38,920  (A) “Other” is comprised of miscellaneous accruals, none of which individually contributed a significant portion of the total.
Income Taxes	 Income Taxes  The Company accounts for income taxes using the liability method. Deferred income taxes reflect the tax consequences on future years of differences between the tax basis of assets and liabilities and their financial reporting amounts. Future tax benefits are recognized to the extent that reali zation of such benefits is more likely than not to occur. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in the period that includes the enactment date.  Deferred tax assets are recognized to the ex tent that these assets are more likely than not to be realized (See Note 5). In making such a determination, the Company considers all available positive and negative evidence, including future r elease of existing taxable temporary differences, projected future taxable income, tax planning strategies, and results of recent operations. R elease of some or all of a valuation allowance would result in the recognition of certain deferred tax assets and a decrease to income tax expense for the period the r elease is recorded.  The Company's policy is to provide for uncertain tax positions and the related interest and penalties based upon management's assessment o f whether a tax benefit is more likely than not to be sustained upon examination by tax authorities . To the extent the Company prevails in matters for which a liability for an unrecognized tax benefit is established or is required to pay amounts in excess of the liability, the Company's effective tax rate in a given financial statement period may be affected. 
Currency Translation	Currency Translation  The financial statements of foreign subsidiaries, where the local currency is the functional currency, are translated into U.S. dollars using exchange rates in effect at the period end for assets and liabilities and average exchange rates during each reporting period for the results of operations. Adjustments resulting from translation of financial statements are reflected as a component of accumulated other comprehensive loss in the Company’s consolidated balance sheets.  Foreign currency transactions are remeasured into the functional currency using translation rates in effect at the time of the transaction with the resulting adjustments included on the consolidated statements of operations within other expense, net. These foreign currency transaction (gains) losses, including the impact of hedging activities, were $(268) , $1,693 and $1,212 for the years ended December 31, 2016, 2015 and 2014, respectively.
Revenue Recognition and Sales Commitments	Revenue Recognition and Sales Commitments  The Company recognizes revenues from the sale of products, net of actual and estimated returns, at the point of passage of title, which is either at the time of shipment or upon customer receipt based upon the terms of the sale. The Company recognizes monitoring service revenues as the services are provided to customers. The Company collects certain taxes and fees on behalf of government agencies and remits such collections on a periodic basis. The taxes are collected from customers but are not included in net sales. Estimated returns are based on historical authorized returns. The Company often enters into agreements with its customers at the beginning of a given vehicle’s expected production life. Once such agreements are entered into, it is the Company’s obligation to fulfill the customers’ purchasing requirements for the entire production life of the vehicle. These agreements are subject to potential renegotiation from time to time, which may affect product pricing. 
Shipping and Handling Costs	Shipping and Handling Costs  Shipping and handling costs are included in cost of goods sold on the consolidated statements of operations. 
Product Warranty and Recall Reserves	Product Warranty and Recall Reserves  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 the product warranty and recall reserve is included as a component of accrued expenses and other current liabilities on the consolidated balance sheets. Product warranty and recall includes $2,617 and $1,973 of a long-term liability at December 31, 2016 and 2015, respectively, which is included as a component of other long-term liabilities on the consolidated balance sheets. The following provides a reconciliation of changes in the product warranty and recall reserve:    Years ended December 31 2016 2015  Product warranty and recall at beginning of period $ 6,419 $ 7,601  Accruals for products shipped during period 4,999 4,609  Aggregate changes in pre-existing liabilities due to claim developments (116) (156)  Settlements made during the period (1,958) (5,635)  Product warranty and recall at end of period $ 9,344 $ 6,419 
Design and Development Costs	Design and Development Costs Expenses associated with the development of new products, and changes to existing products are charged to expense as incurred, and are included in the Company’s consolidated statements of operations as a separate component of costs and expenses. These product development costs amounted to $40,212 , $38,792 and $41,609 for the years ended December 31, 2016, 2015 and 2014, respectively, or 5.8% , 6.0% and 6.3% of net sales for these respective periods. 
Research and Development Activities	Research and Development Activities  The Company’s Electronics and Control Devices segment s enter into research and development contracts with certain customers, which generally provide for reimbursement of costs. The Company incurred and was reimbursed for contracted research and development costs of $12, 764 , $9,659 and $12,319 for the years ended December 31, 2016, 2015 and 2014, respectively.
Share-Based Compensation	Share-Based Compensation  At December 31, 2016, the Company had two types of share-based compensation plan s: (1) Long-Term Incentive Plan for employees and (2) the Amended Directors’ Restricted Shares Plan, for non-employee directors. The Long-Term Incentive Plan is made up of the Long-Term Incentive Plan which expired on June 30, 2007 , the Amended and Restated Long-Term Incentive Plan, as amended, which expired on April 24, 2016 and the 2016 Long-Term Incentive Plan that was approved by shareholders on May 10, 2016, and expires on May 10, 2026 .  Total compensation expense recognized as a component of selling, general and administrative expense on the consolidated statements of operations for share-based compensation arrangements was $6,134 , including $545 related to the modification of the retirement notice provisions of certain awards, $7,224 , including $2,225 from the accelerated vesting in connection with the retirement of the Company’s former President and Chief Executive Officer , and $5,406 for the years ended December 31, 2016, 2015 and 2014, respectively. Of these amounts, $(117) , $828 and $243 for the years ended December 31, 2016, 2015 and 2014, respectively, were related to the Long-Term Cash Incentive Plan “Phantom Shares” discussed in Note 8. There was no share-based compensation expense capitalized in inventory during 2016, 2015 or 2014.
Financial Instruments and Derivative Financial Instruments	Financial Instruments and Derivative Financial Instruments  Financial instruments, including derivative financial instruments, held by the Company include cash and cash equivalents, accounts receivable, accounts payable, long-term debt, an interest rate swap, fixed price commodity contracts and foreign currency forward contracts. The carrying value of cash and cash equivalents, accounts receivable and accounts payable is considered to be representative of fair value because of the short maturity of these instruments. See Note 9 for fair value disclosures of the Company’s financial instruments.
Common Shares Held in Treasury	Common Shares Held in Treasury  The Company accounts for Common Shares held in treasury under the cost method (applied on a FIFO basis) and includes such shares as a reduction of total shareholders’ equity.
Earnings (Loss) Per Share	Earnings (Loss) Per Share  Basic earnings (loss) per share was computed by dividing net income attributable to Stoneridge Inc. by the weighted-average number of Common Shares outstanding for each respective period. Diluted earnings (loss) per share was calculated by dividing net income (loss) attributable to Stoneridge, Inc. by the weighted-average of all potentially dilutive Common Shares that were outstanding during the periods presented. However, for all periods in which the Company recognized a net loss from continuing operations, the Company did not recognize the effect of the potential dilutive securities as their inclusion would have been anti-dilutive.  Actual weighted-average Common Shares outstanding used in calculating basic and diluted net income (loss) per share were as follows:     Years ended December 31 2016 2015 2014  Basic weighted-average Common Shares outstanding 27,763,990 27,337,954 26,923,809  Effect of dilutive shares 544,932 621,208 -  Diluted weighted-average Common Shares outstanding 28,308,922 27,959,162 26,923,809  There were 0 , 134,250 and 466,650 performance-based restricted Common Shares outstanding at December 31, 2016, 2015 and 2014, respectively. There were also 843,140 , 573,885 and 374,400 performance-based right to receive Common Shares outstanding at December 31, 2016, 2015 and 2014. These performance-based restricted and 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 year were the end of the contingency period. Restricted and right to receive Common Shares were not included in the computation of diluted earnings per share for the year ended December 31, 2014 as the Company had a net loss from continuing operations that year, and as such they would have be en anti-dilutive.
Deferred Finance Costs, net	Deferred Financing Costs, net  Deferred financing costs are amortized over the life of the related financial instrument using the straight-line method, which approximates the effective interest method. The 2.5% discount to the initial purchasers of the Company’s senior notes was accreted using the effective interest rate of 10.0% through October 18, 2014, the date the senior notes were redeemed. During 2014, the Company redeemed the senior notes resulting in the acceleration of the remaining deferred financing costs of $597 which were included in loss on early extinguishment of debt in the statement of operations in 2014. Deferred finance cost amortization and debt discount accretion for the years ended December 31, 2016, 2015 and 2014 was $355 , $388 and $850 , respectively, and is included as a component of interest expense, net in the consolidated statements of operations. As permitted by the ASU, the Company has elected to continue to present deferred financing costs related to the Credit Facility within long-term assets in the Company’s consolidated balance sheets. De ferred financing costs, net, were $1,471 and $ 1,428 , a s of December 31, 2016 and 2015 , respectively .
Changes in Accumulated Other Comprehensive Loss by Component	 Changes in Accumulated Other Comprehensive Loss by Component Changes in accumulated other comprehensive loss for the years ended December 31, 2016 and 2015 were as follows:     Foreign Unrealized Benefit  currency gain (loss) plan  translation on derivatives liability Total  Balance at January 1, 2016 $ (70,296) $ 390 $ 84 $ (69,822)   Other comprehensive income (loss) before reclassifications 2,401 (572) - 1,829  Amounts reclassified from accumulated other  comprehensive loss - 164 (84) 80  Net other comprehensive income (loss), net of tax 2,401 (408) (84) 1,909   Balance at December 31, 2016 $ (67,895) $ (18) $ - $ (67,913)   Balance at January 1, 2015 $ (45,603) $ 1 $ 129 $ (45,473)   Other comprehensive loss before reclassifications (24,693) (671) (45) (25,409)  Amounts reclassified from accumulated other  comprehensive loss - 1,060 - 1,060  Net other comprehensive income (loss), net of tax (24,693) 389 (45) (24,349)   Balance at December 31, 2015 $ (70,296) $ 390 $ 84 $ (69,822) 
Recently Issued Accounting Standards	Recently Issued Accounting Standards Not Yet Adopted as of December 31, 2016  In January 2017, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2017-04, "Simplifying the Test for Goodwill Impairment." It eliminates Step 2 from the goodwill impairment test and an entity should recognize an impairment charge for the amount by which the carrying amount of goodwill exceeds the reporting unit's fair value, not to exceed the carrying amount of goodwill. This guidance is effective for annual and any interim impairment tests in fiscal years beginning after December 15, 2019. The Company does not expect this standard to have any impact on its consolidated financial statements.  In January 2017, the FASB also issued ASU 2017-01, "Clarifying the Definition of a Business. It revises the definition of a business and provides a framework to evaluate when an input and a substantive process are present in an acquisition to be considered a business. This guidance is effective for annual periods beginning after December 15, 2017. The Company expects to adopt this standard as of January 1, 2018, which is not expected to have any impact on its 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. The ASU is effective for interim and annual periods beginning after December 15, 2017 with early adoption permitted. The Company is currently evaluating the impact of adopting this standard on its consolidated financial statements.  In March 2016, the FASB issued Accounting Standards Update ASU 2016-09, “Compensation - Stock Compensation (Topic 718)” which is intended to simplify several aspects of the accounting for share-based payment award transactions including how excess tax benefits should be classified in the Company’s consolidated financial statements. The new standard simplifies the treatment of share based payment transactions by recognizing the impact of excess tax benefits or deficiencies related to exercised or vested awards in income tax expense in the period of exercise or vesting. The new standard also modifies the diluted earnings per share calculation using the treasury stock method by eliminating the excess tax benefits or deficiencies from the calculation. These changes will be recognized prospectively. The new standard also permits companies to recognize forfeitures as they occur as an alternative to utilizing estimated forfeitures rates which has been the required practice. The presentation of excess tax benefits in the statement of consolidated cash flows is also modified to be included with other income tax cash flows as an operating activity. The change can be adopted using a prospective or retrospective transition method. The new standard clarifies that cash paid by an employer when directly withholding shares for tax withholding purposes should be presented as a financing activity in the statement of consolidated cash flows and should be applied retrospectively. The new accounting standard will be effective for fiscal years beginning after December 15, 2016, including interim periods within that year. T he Company had unrecognized tax benefits related to s hare-based payment awards of $1,700 as of December 31, 2016 . Upon adoption, this amount will be recorded to other long-term assets with a corresponding increase to retained earnings associated with the cumulative effect of the accounting change.  In February 2016, the FASB issued ASU 2016 – 02, “Leases (Topic 842)”, which will require that a lessee recognize assets and liabilities on the balance sheet for all leases with a lease term of more than twelve months, with the result being the recognition of a right of use asset and a lease liability. The amendment is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The Company expects to adopt this standard as of January 1, 2019. The Company is currently evaluating the impact of adopting this standard on its consolidated financial statements, which will require right of use assets and lease liabilities be recorded in the consolidated balance sheet for operating leases.  In July 2015, the FASB issued ASU 2015-11 “Simplifying the Measurement of Inventory” which requires that inventory be measured at the lower of cost or net realizable value. Prior to the issuance of the new guidance, inventory was measured at the lower of cost or market. Replacing the concept of market with the single measurement of net realizable value is intended to reduce cost and complexity. The new accounting standard is effective for fiscal years beginning after December 15, 2016. The Company will adopt this standard as of January 1, 2017, which is not expected to have a material impact on the Company’s consolidated financial statements or disclosures.  In May 2014, the FASB issued ASU 2014-09 “Revenue from Contracts with Customers,” which is the new comprehensive revenue recognition standard that will supersede existing revenue recognition guidance under U.S. GAAP. The standard's core principle is that a company will recognize revenue when it transfers promised goods or services to a customer in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. To achieve this principle, an entity identifies the contract with a customer, identifies the separate performance obligations in the contract, determines the transaction price, allocates the transaction price to the separate performance obligations and recognizes revenue when each separate performance obligation is satisfied. This ASU allows for both retrospective and prospective methods of adoption. In July 2015, the FASB approved a one-year deferral of the effective date of the standard. As such, the new standard will become effective for annual and interim periods beginning after December 15, 2017 with early adoption on the original effective date permitted. The Company is currently evaluating the impact of adopting this standard on its consolidated financial statements , and anticipate testing our new controls and processes designed to comply with the standard in 2017 to permit the Company’s adoption on January 1, 2018. The Company anticipates changes to revenue recognition of pre-production activities such as customer funded tooling and engineering design and development cost recoveries, including the potential recording of these as revenue.           Recently Adopted Accounting Standards  In September 2015, the FASB issued ASU 2015- 16, “Business Combinations,” which simplifies the accounting for measurement-period adjustments related to business combinations. ASU 2015-16 requires that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The amendments in the ASU require that the acquirer record, in the same period’s financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of the change to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. The Company adopted this standard as of January 1, 2016, and was applied prospectively. The adoption did not have a material impact on the Company’s consolidated financial statements or disclosures.  In November 2015, the FASB issued ASU 2015- 17, “Income Taxes (Topic 740),” which simplifies the presentation of deferred income taxes. Under previous guidance, entities were required to separate deferred income tax liabilities and assets into current and noncurrent amounts in the balance sheet on a jurisdiction by jurisdiction basis . ASU 2015-17 requires that all deferred income taxes be classified as noncurrent in the balance sheet. The Company adopted this standard in 2016 and applied it prospectively. As such, all deferred tax assets and liabilities have been classified as non-current in the balance sheet at December 31, 2016. See Note 5 for additional information regarding deferred tax assets and liabilities

Summary of Significant Accoun25

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2016
Summary of Significant Accounting Policies [Abstract]
Schedule of Accounts Receivable and Concentration of Credit Risk	The Company’s largest customers are Ford Motor Company, General Motors Company and Scania Group, primarily related to the Control Devices and Electronics reportable segments and accounted for the following percentages of consolidated net sales for the years ended December 31, 2016, 2015 and 2014:    2016 2015 2014  Ford Motor Company 17 % 14 % 11 %  General Motors Company 7 % 5 % 5 %  Scania Group 6 % 7 % 8 % 
Schedule of Inventory, Current	Inventories consist of the following:    As of December 31 2016 2015  Raw materials $ 35,665 $ 36,021  Work-in-progress 7,483 7,162  Finished goods 16,969 17,826  Total inventories, net $ 60,117 $ 61,009 
Statements of Operations for Discontinued Operations	 The following tables display summarized activity in our consolidated statements of operations for discontinued operations during the years ended December 31, 2015 and 2014, related to the Wiring business. There were no discontinued operations for the year ended December 31, 2016.     Years ended December 31 2015 2014 (A)   Net sales $ - $ 167,434  Cost of goods sold (C) - 154,787  Selling, general and administrative (C) - 12,697  Interest expense, net - 69  Other expense (income), net - (58)  Loss from operations of discontinued  operations before income taxes (C) - (61)  Income tax expense on discontinued operations - (750)  Loss from discontinued operations, net of tax - (811)   Loss on disposal (B) $ (241) $ (6,955)  Income tax expense on gain (loss) on disposal (D) 31 (1,621)  Loss on disposal, net of tax (210) (8,576)   Loss from discontinued operations $ (210) $ (9,387)  (A) The operations of the Wiring business were presented only for the seven months ended July 31, 2014 because the sale was completed on August 1, 2014.  (B) Included in loss on disposal for the years ended December 31, 2015 and 2014 were transaction costs of $223 and $1,384 , respectively. The loss on disposal also includes a working capital and other adjustments of $18 for the year ended December 31, 2015. In addition, the loss on disposal included $2,734 in previously deferred foreign currency translation for the year ended December 31, 2014.  (C) The assets and liabilities of the Wiring business were reclassified as held for sale effective May 26, 2014. Accordingly, depreciation and amortization for the related Wiring assets were not recorded after that date.  (D) Gains and losses from foreign currency remeasurement related to income taxes were included as a component of income tax (expense) benefit.     Years ended December 31 2014  Depreciation and amortization $ 2,111  Capital expenditures 1,238 
Property, Plant and Equipment	Property, plant and equipment are recorded at cost and consist of the following:     As of December 31 2016 2015  Land and land improvements $ 3,376 $ 3,538  Buildings and improvements 32,271 32,904  Machinery and equipment 180,944 160,721  Office furniture and fixtures 6,813 6,541  Tooling 67,261 68,101  Information technology 23,632 24,035  Vehicles 398 422  Leasehold improvements 2,583 2,581  Construction in progress 16,854 23,914  Total property, plant, and equipment 334,132 322,757  Less: accumulated depreciation (242,632) (237,493)  Property, plant and equipment, net $ 91,500 $ 85,264 
Schedule of Property, Plant and Equipment Estimated Useful Lives	Depreciable lives within each property classification are as follows:     Buildings and improvements 10 -40 years  Machinery and equipment 3 -10 years  Office furniture and fixtures 3 -10 years  Tooling 2 -5 years  Information technology 3 -5 years  Vehicles 3 -5 years  Leasehold improvements shorter of lease term or 3-10 years 
Schedule of Goodwill	Goodwill and changes in the carrying amount of goodwill by segment for the year then ended December 31, 2014 was as follows:      Electronics PST Total  Balance at January 1, 2014 $ 604 $ 53,744 $ 54,348  Acquisition of aftermarket business 664 - 664  Goodwill impairment - (51,458) (51,458)  Currency translation (190) (2,286) (2,476)  Balance at December 31, 2014 $ 1,078 $ - $ 1,078 
Schedule of Acquired Finite-Lived Intangible Assets by Major Class	  Other Intangible Assets  Other intangible assets, net at December 31, 2016 and 2015 consisted of the following:     Acquisition Accumulated  As of December 31, 2016 cost amortization Net  Customer lists $ 27,476 $ (9,138) $ 18,338  Tradenames 18,116 (4,558) 13,558  Technology 10,862 (3,498) 7,364  Other 41 (41) -  Total $ 56,495 $ (17,235) $ 39,260     Acquisition Accumulated  As of December 31, 2015 cost amortization Net  Customer lists $ 23,003 $ (6,101) $ 16,902  Tradenames 15,129 (3,043) 12,086  Technology 9,066 (2,336) 6,730  Other 34 (34) -  Total $ 47,232 $ (11,514) $ 35,718 
Accrued Expenses and Other Current Liabilities	Accrued expenses and other current liabilities consist of the following:     As of December 31 2016 2015  Compensation related liabilities $ 16,329 $ 17,878  Product warranty and recall obligations 6,727 4,446  Other (A) 18,433 16,596  Total accrued expenses and other current liabilities $ 41,489 $ 38,920  (A) “Other” is comprised of miscellaneous accruals, none of which individually contributed a significant portion of the total. 
Schedule of Product Warranty Liability	The following provides a reconciliation of changes in the product warranty and recall reserve:    Years ended December 31 2016 2015  Product warranty and recall at beginning of period $ 6,419 $ 7,601  Accruals for products shipped during period 4,999 4,609  Aggregate changes in pre-existing liabilities due to claim developments (116) (156)  Settlements made during the period (1,958) (5,635)  Product warranty and recall at end of period $ 9,344 $ 6,419 
Schedule of Weighted-Average Number of Shares	Actual weighted-average Common Shares outstanding used in calculating basic and diluted net income (loss) per share were as follows:     Years ended December 31 2016 2015 2014  Basic weighted-average Common Shares outstanding 27,763,990 27,337,954 26,923,809  Effect of dilutive shares 544,932 621,208 -  Diluted weighted-average Common Shares outstanding 28,308,922 27,959,162 26,923,809 
Changes in Accumulated Other Comprehensive Loss by Component	Changes in accumulated other comprehensive loss for the years ended December 31, 2016 and 2015 were as follows:     Foreign Unrealized Benefit  currency gain (loss) plan  translation on derivatives liability Total  Balance at January 1, 2016 $ (70,296) $ 390 $ 84 $ (69,822)   Other comprehensive income (loss) before reclassifications 2,401 (572) - 1,829  Amounts reclassified from accumulated other  comprehensive loss - 164 (84) 80  Net other comprehensive income (loss), net of tax 2,401 (408) (84) 1,909   Balance at December 31, 2016 $ (67,895) $ (18) $ - $ (67,913)   Balance at January 1, 2015 $ (45,603) $ 1 $ 129 $ (45,473)   Other comprehensive loss before reclassifications (24,693) (671) (45) (25,409)  Amounts reclassified from accumulated other  comprehensive loss - 1,060 - 1,060  Net other comprehensive income (loss), net of tax (24,693) 389 (45) (24,349)   Balance at December 31, 2015 $ (70,296) $ 390 $ 84 $ (69,822) 

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2016
Debt [Abstract]
Schedule of Debt	  Interest rates at  December 31, December 31, December 31,  2016 2015 2016 Maturity  Revolving Credit Facility  Credit facility $ 67,000 $ 100,000 2.00% September 2021   Debt  PST short-term obligations 5,097 11,556 4.27% - 20.33% 2017  PST long-term notes 11,452 6,428 7.5% - 19.00% 2017 - 2021  Other 137 379  Total debt 16,686 18,363  Less: current portion (8,626) (13,905)  Total long-term debt, net $ 8,060 $ 4,458  
Future Maturities of Long-Term Debt	 At December 31, 2016, the future maturities of debt were as follows:     Year ended December 31  2017 $ 8,626  2018 4,303  2019 2,604  2020 611  2021 67,542  Total $ 83,686 

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2016
Income Taxes [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	The components of income (loss) before income taxes and the provision for income taxes consist of the following:   Years ended December 31 2016 2015 2014 Income (loss) before income taxes:  Domestic $ 35,088 $ 22,959 $ 1,635  Foreign 4,097 (2,729) (54,695)  Total income (loss) before income taxes $ 39,185 $ 20,230 $ (53,060) Provision for income taxes: Current:  Federal $ 760 $ 386 $ -  State and foreign 2,575 1,232 1,382  Total current expense 3,335 1,618 1,382 Deferred:  Federal (37,828) - -  State and foreign (1,896) (2,165) (3,238)  Total deferred benefit (39,724) (2,165) (3,238)  Total income tax benefit $ (36,389) $ (547) $ (1,856) 
Schedule of Effective Income Tax Rate Reconciliation	  A reconciliation of the Company’s effective income tax rate to the statutory federal tax rate is as follows:    Years ended December 31 2016 2015 2014  Statutory U.S. federal income tax rate 35.0 % 35.0 % (35.0) %  State income taxes, net of federal tax benefit 1.9 0.2 -  Tax credits (0.8) (2.8) (1.3)  Foreign tax rate differential (4.7) (3.3) 0.2  Reduction (increase) of income tax accruals 0.1 (0.5) 0.2  Tax on foreign dividends, net of foreign tax credits - - (0.1)  Reduction (increase) of deferred taxes (1.3) 5.5 -  Valuation allowances (121.6) (36.0) (2.1)  Loss of domestic flow-through entity not attributable to Stoneridge, Inc. - - 33.9  Non-deductible compensation - (1.5) 1.0  Other (1.4) 0.7 (0.3)  Effective income tax rate (92.8) % (2.7) % (3.5) % 
Schedule of Deferred Tax Assets and Liabilities	  Significant components of the Company’s deferred tax assets and liabilities were as follows:   As of December 31 2016 2015 Deferred tax assets:  Inventories $ 2,156 $ 2,108  Employee compensation and benefits 4,785 3,902  Insurance 245 281  Depreciation and amortization 1,310 1,297  Net operating loss carryforwards 28,952 39,846  General business credit carryforwards 14,135 12,990  Other reserves 7,609 5,643  Gross deferred tax assets 59,192 66,067  Less: Valuation allowance (11,125) (59,391)  Deferred tax assets less valuation allowance 48,067 6,676  Deferred tax liabilities:  Depreciation and amortization (14,911) (13,282)  Basis difference - equity investee (31,016) (31,016)  Other (1,358) (1,074)  Gross deferred tax liabilities (47,285) (45,372)   Net deferred tax asset (liability) $ 782 $ (38,696) 
Classification of Net Deferred Tax Assets and Liability	The balance sheet classification of our net deferred tax asset is shown below :     Years ended December 31 2016 2015   Current deferred income tax assets - 1,239  Current deferred income tax liabilities - (39)  Long-term deferred income tax assets 10,542 1,436  Long-term deferred income tax liabilities (9,760) (41,332)  Net deferred tax asset $ 782 $ (38,696) 
Summary of Income Tax Contingencies	The following is a reconciliation of the Company’s total gross unrecognized tax benefits:     2016 2015 2014  Balance as of January 1 $ 4,304 $ 3,888 $ 3,624   Tax positions related to the current year:  Additions 208 201 217  Tax positions related to the prior years:  Additions - 523 168  Reductions (61) - -  Expirations of statutes of limitation (612) (308) (121)   Balance as of December 31 $ 3,839 $ 4,304 $ 3,888 
Schedule of Tax Years Open for Examination	The following table summarizes the open tax years for each important jurisdiction:    Jurisdiction Open Tax Years  U.S. Federal 2013 - 2016  Brazil 2011 - 2016  China 2013 - 2016  France 2012 - 2016  Mexico 2012 - 2016  Spain 2012 - 2016  Sweden 2011 - 2016  United Kingdom 2012 - 2016 

Operating Lease Commitments (Ta

Operating Lease Commitments (Tables)	12 Months Ended
	Dec. 31, 2016
Operating Lease Commitments [Abstract]
Schedule of Future Minimum Rental Payments for Operating Leases	Future minimum operating lease commitments as of December 31, 2016 were as follows:     Year ended December 31  2017 $ 5,042  2018 3,922  2019 3,356  2020 2,584  2021 2,298  Thereafter 6,176  Total $ 23,378 

Share-Based Compensation Plans

Share-Based Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2016
Share-Based Compensation Plans [Abstract]
Schedule of the Allocation of Performance Shares Between Total Shareholder Return and Earnings per Share	The allocation of performance shares between total shareholder return and earnings per share were as follows for the years ended December 31:     2016 2015 2014  Total shareholder return 55 % 36 % 20 %  Earnings per share 45 % 64 % 80 % 
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award	   A summary of the status of the Company’s non-vested share units as of December 31, 2016 and the changes during the year then ended, are presented below:    Time-based awards Performance-based awards  Weighted- Weighted-  Common average grant- Common average grant-  Shares date fair value Shares date fair value  Non-vested as of December 31, 2015 731,241 $ 9.45 712,485 $ 10.70  Granted 250,227 $ 13.52 269,255 $ 13.66  Vested (339,963) $ 7.07 (131,033) $ 7.58  Forfeited (29,468) $ 11.82 (25,567) $ 11.30  Non-vested as of December 31, 2016 612,037 $ 12.32 825,140 $ 12.14 

Financial Instruments and Fai30

Financial Instruments and Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2016
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 consolidated balance sheets were as follows:     Notional Prepaid expenses Accrued expenses and  amounts (A) and other current assets other current liabilities  December 31, December 31, December 31,  2016 2015 2016 2015 2016 2015  Derivatives designated as hedging instruments:  Cash flow hedges:  Forward currency contracts $5,699 $22,208 $ - $474 $28 $84  Derivatives not designated as hedging instruments:  Forward currency contracts $1,601 $1,647 $ - $ - $3 $9  (A) Notional amounts represent the gross contract / notional amount of the derivatives outstanding. 
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 loss in shareholders’ equity and in net income (loss) for the years ended December 31 were as follows:     Loss recorded Loss reclassified from  in other comprehensive other comprehensive income  income (loss) (loss) into net income (loss)  2016 2015 2014 2016 2015 2014  Derivatives designated as cash flow hedges:  Forward currency contracts $ (582) $ (671) (46) $ (164) $ (1,060) (310)  Fixed price commodity contracts - - (408) - - (256)  Total derivatives designated as cash flow hedges $ (582) $ (671) (454) $ (164) $ (1,060) (566) 

Restructuring and Business Re31

Restructuring and Business Realignment (Tables)	12 Months Ended
	Dec. 31, 2016
Restructuring and Business Realignment [Abstract]
Schedule of Restructuring and Related Costs	 The expenses for the restructuring activities that relate to the Electronics reportable segment include the following:     2016 2015 2014  Accrued balance at January 1 $ 458 $ 733 $ 780  Charge to expense 59 183 494  Foreign currency translation (69) 3 (45)  Cash payments, net (175) (461) (496)  Accrued balance at December 31 $ 273 $ 458 $ 733 
Schedule of Restructuring Reserve by Type of Cost	  Business realignment charges by reportable segment were as follows:    Years ended December 31 2016 2015 2014  Electronics (A) $ 1,180 $ 317 $ -  PST (B) 1,437 403 1,578  Unallocated Corporate (C) - 309 -  Total business realignment charges $ 2,617 $ 1,029 $ 1,578  (A) Severance costs for the year ended December 31, 2016 related to selling, general and administrat ive (“SG&A”) and design and development (“D&D”) were $196 and $984 , respectively. Severance costs for the year ended December 31, 2015 related to SG&A and D&D were $102 and $215 , respectively.  (B) Severance costs for the year ended December 31, 2016 related to cost of goods sold (“COGS”), SG&A and D&D were $437 , $884 and $116 , respectively. Severance costs for the year ended December 31, 2015 related to COGS, SG&A and D&D were $172 , $117 and $114 , respectively. Severance costs for year ended December 31, 2014 related to COGS, SG&A and D&D were $847 , $559 and $172 , respectively.  (C) Severance costs for the year then ended December 31, 2015 related to SG&A were $309 .  Business realignment charges classified by statement of operations line item were as follows:     Years ended December 31 2016 2015 2014  Cost of goods sold $ 437 $ 172 $ 847  Selling, general and administrative 1,080 528 559  Design and development 1,100 329 172  Total business realignment charges $ 2,617 $ 1,029 $ 1,578 

Segment Reporting (Tables)

Segment Reporting (Tables)	12 Months Ended
	Dec. 31, 2016
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	A summary of financial information by reportable segment is as follows:    Years ended December 31 2016 2015 2014  Net Sales:  Control Devices $ 408,132 $ 333,010 $ 306,658  Inter-segment sales 1,826 2,055 3,080  Control Devices net sales 409,958 335,065 309,738   Electronics 205,256 216,544 214,141  Inter-segment sales 33,361 22,904 35,163  Electronics net sales 238,617 239,448 249,304   PST 82,589 95,258 139,780  Inter-segment sales - - -  PST net sales 82,589 95,258 139,780   Eliminations (35,187) (24,959) (38,243)  Total net sales $ 695,977 $ 644,812 $ 660,579  Operating Income (Loss):  Control Devices $ 61,815 $ 44,690 $ 35,387  Electronics 14,798 13,784 17,444  PST (3,462) (7,542) (59,587)  Unallocated Corporate (A) (29,069) (23,117) (19,067)  Total operating income (loss) $ 44,082 $ 27,815 $ (25,823)  Depreciation and Amortization:  Control Devices $ 10,276 $ 9,260 $ 9,545  Electronics 3,971 3,666 4,432  PST 8,559 9,272 12,998  Unallocated Corporate 452 211 130  Total depreciation and amortization (B) $ 23,258 $ 22,409 $ 27,105  Interest Expense, net:  Control Devices $ 226 $ 326 $ 303  Electronics 142 161 695  PST 3,396 2,957 2,764  Unallocated Corporate 2,513 2,921 13,118  Total interest expense, net $ 6,277 $ 6,365 $ 16,880  Capital Expenditures:  Control Devices $ 13,261 $ 15,094 $ 13,658  Electronics 5,665 6,538 3,541  PST 3,213 5,889 6,161  Unallocated Corporate (C) 2,337 1,214 156  Total capital expenditures $ 24,476 $ 28,735 $ 23,516      December 31, December 31,  2016 2015  Total Assets:  Control Devices $ 150,623 $ 127,649  Electronics 99,964 97,443  PST 107,405 100,143  Corporate (C) 287,031 288,806  Eliminations (250,494) (249,789)  Total assets $ 394,529 $ 364,252     (A) Unallocated Corporate expenses include, among other items, accounting, finance, legal, information technology costs as well as share-based compensation.  (B) These amounts represent depreciation and amortization on property, plant and equipment and certain intangible assets.  (C) Corporate assets consist primarily of cash, intercompany loan receivables, capital expenditures for the new headquarter building, equity investments and investments in subsidiaries. 
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas	The following table presents net sales and long-term assets for the geographic areas in which the Company operates:   2016 2015 2014   Net Sales:  North America $ 428,046 $ 369,032 $ 330,516  South America 82,589 95,258 139,780  Europe and Other 185,342 180,522 190,283  Total net sales $ 695,977 $ 644,812 $ 660,579    December 31, December 31,  2016 2015   Long-term Assets:  North America $ 73,835 $ 60,099  South America 63,497 56,943  Europe and Other 16,304 15,301  Total long-term assets $ 153,636 $ 132,343 

Unaudited Quarterly Financial33

Unaudited Quarterly Financial Data (Tables)	12 Months Ended
	Dec. 31, 2016
Unaudited Quarterly Financial Data [Abstract]
Schedule of Quarterly Financial Information	The following is a summary of quarterly results of operations:    Quarter ended  2016 December 31 September 30 June 30 March 31  Net sales $ 172,612 $ 173,846 $ 186,903 $ 162,616  Gross profit 47,779 49,748 52,751 45,161  Operating income 10,170 11,780 13,626 8,506  Income tax expense (benefit) from continuing operations (B) (39,503) 919 1,350 845  Income from continuing operations 48,489 9,981 10,995 6,109  Net income 48,489 9,981 10,995 6,109  Net income (loss) attributable to noncontrolling interests 122 (303) (576) (1,130)  Net income attributable to Stoneridge, Inc. 48,367 10,284 11,571 7,239  Earnings per share from continuing operations  attributable to Stoneridge, Inc.:  Basic (A) $ 1.74 $ 0.37 $ 0.42 $ 0.26  Diluted (A) $ 1.70 $ 0.36 $ 0.41 $ 0.26  Earnings per share attributable to Stoneridge, Inc.:  Basic (A) $ 1.74 $ 0.37 $ 0.42 $ 0.26  Diluted (A) $ 1.70 $ 0.36 $ 0.41 $ 0.26   Quarter ended  2015 December 31 September 30 June 30 March 31  Net sales $ 154,641 $ 162,057 $ 165,289 $ 162,825  Gross profit 42,239 45,145 45,946 43,648  Operating income 8,327 8,947 7,415 3,126  Income tax expense (benefit) from continuing operations (345) 32 (381) 147  Income from continuing operations 4,935 7,411 6,328 2,103  Income (loss) from discontinued operations (C) 16 (113) 55 (168)  Net income 4,951 7,298 6,383 1,935  Net loss attributable to noncontrolling interests (1,133) (69) (596) (409)  Net income attributable to Stoneridge, Inc. 6,084 7,367 6,979 2,344  Earnings per share from continuing operations  attributable to Stoneridge, Inc.:  Basic (A) $ 0.22 $ 0.27 $ 0.26 $ 0.10  Diluted (A) $ 0.22 $ 0.27 $ 0.25 $ 0.09  Earnings (loss) per share attributable to discontinued  operations:  Basic (A) $ 0.00 $ (0.01) $ 0.00 $ (0.01)  Diluted (A) $ 0.00 $ (0.01) $ 0.00 $ (0.01)  Earnings per share attributable to Stoneridge, Inc.:  Basic (A) $ 0.22 $ 0.26 $ 0.26 $ 0.09  Diluted (A) $ 0.22 $ 0.26 $ 0.25 $ 0.08  (A) Earnings per share for the year may not equal the sum of the four historical quarters earnings per share due to changes in weighted-average basic and diluted shares outstanding.  (B) The Company recorded the re lease of a valuation allo wance associated with its U.S. f ederal, certain state and foreign deferred tax assets for the year ended December 31, 2016.  A gain (loss) on disposal of the Wiring business was recorded for the quarters ended March 31, 2015, June 30, 2015, September 30, 2015 and December 31, 2015 for $(168) , $55 , $(113) and $16, respectively

Summary of Significant Accoun34

Summary of Significant Accounting Policies (Narrative) (Details) BRL in Thousands, $ in Thousands		Aug. 01, 2014USD ($)	May 26, 2014USD ($)	Dec. 31, 2016USD ($)	Sep. 30, 2016USD ($)	Jun. 30, 2016USD ($)	Mar. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Sep. 30, 2015USD ($)	Jun. 30, 2015USD ($)	Mar. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Sep. 30, 2014USD ($)	Jun. 30, 2014USD ($)	Jul. 31, 2014USD ($)	Sep. 30, 2014USD ($)	Dec. 31, 2016BRLshares	Dec. 31, 2016USD ($)	Dec. 31, 2015BRL	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)		Dec. 31, 2011	Dec. 31, 2016USD ($)shares	Dec. 31, 2015USD ($)shares	Dec. 31, 2014USD ($)shares	Oct. 18, 2014USD ($)	Dec. 31, 2013USD ($)	Dec. 31, 2010
Accounting Policy [Line Items]
Depreciation expense																		$ 19,998		$ 18,964	$ 22,299
Loss on disposal, net of tax								$ 16	$ (113)	$ 55	$ (168)									(210)	(8,576)
Less: income (loss) attributable to noncontrolling interest				$ 122	$ (303)	$ (576)	$ (1,130)	(1,133)	(69)	(596)	(409)							(1,887)		(2,207)	(13,483)
Preproduction costs related to long-term supply arrangements, costs capitalized																								$ 6,859	$ 9,405
Goodwill impairment charge (benefit)																					51,458
Acquisition of business																					664
Goodwill												$ 1,078									1,078					$ 1,078		$ 54,348
Currency translation																					(2,476)
Goodwill, ending balance												1,078									1,078
Intangible assets, net																								39,260	35,718
Amortization																		$ 3,259		3,445	4,784
Amortization expense next year																								3,200
Amortization expense year two																								3,200
Amortization expense year three																								3,200
Amortization expense year four																								3,200
Amortization expense year five																								3,200
Intangible assets, weighted-average remaining amortization period, years																	12 years	12 years
Valuation allowance																								11,125	59,391
Design and development expense																		$ 40,212		$ 38,792	$ 41,609
Design and development expense percentage																	5.80%	5.80%	6.00%	6.00%	6.30%
Research and development expense reimbursed																		$ 12,764		$ 9,659	$ 12,319
Share-based compensation expense																		6,134		7,224	5,406
Share-based compensation expense capitalized as inventory																		0		0	0
Share-based compensation vested in period, fair value																		5,394		9,101	3,509
Amortization of financing costs																		355		388	850
Deferred financing costs, net																								1,471	1,428		$ 597
Cumulative goodwill impairment																								300,083	300,083
Goodwill impairment loss (gain) attributable to noncontrolling interest												6,142
Product warranty and recall accrual																								2,617	1,973
Inventory amount, FIFO																								37,765	35,378
Inventory amount, weighted average cost																								22,352	25,631
Foreign currency transaction gain (loss)																		268		(1,693)	(1,212)
Post-disposition sales to Wiring																		19,766		26,952	12,230
Post-disposition purchases from Wiring																		425		689	269
Sales				172,612	$ 173,846	$ 186,903	$ 162,616	154,641	$ 162,057	$ 165,289	$ 162,825							695,977		644,812	660,579
Cost of sales																		500,538		467,834	469,705
Unrecognized tax benefits related to share-based payment awards																								1,700
Selling, General and Administrative Expenses [Member]
Accounting Policy [Line Items]
Share-based compensation expense																		6,134			5,406
CEO Retirement Additional Expense [Member] | Selling, General and Administrative Expenses [Member]
Accounting Policy [Line Items]
Additional stock compensation expense in connection with retirement of former President and CEO																				2,225
Share-based compensation expense																				7,224
Prepaid Expenses and Other Current Assets [Member]
Accounting Policy [Line Items]
Preproduction costs related to long-term supply arrangements, costs capitalized																								6,446
Investments and Other Long Term Assets [Member]
Accounting Policy [Line Items]
Preproduction costs related to long-term supply arrangements, costs capitalized																									9,405
Noncontrolling interest
Accounting Policy [Line Items]
Less: income (loss) attributable to noncontrolling interest																		(1,887)		(2,207)	(13,483)
Electronics [Member]
Accounting Policy [Line Items]
Acquisition of business																					664
Goodwill				931				981				1,078						931		981	1,078			931	$ 981	1,078		604
Currency translation																		(50)		(97)	(190)
Goodwill, ending balance				$ 931				$ 981				1,078						931		981	1,078
Wiring [Member]
Accounting Policy [Line Items]
Predisposition intercompany sales															$ 17,448
Predisposition intercompany purchases															$ 4,025
PST [Member]
Accounting Policy [Line Items]
Accounts receivable sold																	BRL 53,886	15,297	BRL 24,994	6,401
Gain (loss) on sale of accounts receivable																	(1,615)	(459)	(540)	(156)
Proceeds from sale of accounts receivable																	52,271	14,838	BRL 24,454	6,245
Remaining credit exposure																	BRL 3,476							$ 1,067
Goodwill impairment charge (benefit)												27,960		$ 29,300		$ 23,498					51,458
Reduction of goodwill impairment													$ 5,802
Goodwill																												$ 53,744
Currency translation																					(2,286)
Goodwill, ending balance
Goodwill impairment loss (gain) attributable to noncontrolling interest													$ (1,274)	$ 6,436		$ 5,162					11,304
Senior Notes [Member]
Accounting Policy [Line Items]
Debt instrument, unamortized discount, percentage																											2.50%
Debt instrument, interest rate, effective percentage																											10.00%
Long Term Cash Incentive Plan [Member]
Accounting Policy [Line Items]
Share-based compensation expense																		(117)		$ 828	$ 243
Restricted Stock [Member] | Selling, General and Administrative Expenses [Member]
Accounting Policy [Line Items]
Additional stock compensation expense in connection with retirement provision modificaton																		$ 545
Performance Based Restricted Common Shares [Member]
Accounting Policy [Line Items]
Common shares, non-vested | shares																	0							0	134,250	466,650
Share-based compensation arrangement by share-based payment award, equity instruments other than options, nonvested, number | shares																	0							0	134,250	466,650
Performance Based Right to Received Common Shares [Member]
Accounting Policy [Line Items]
Common shares, non-vested | shares																	843,140							843,140	573,885	374,400
Share-based compensation arrangement by share-based payment award, equity instruments other than options, nonvested, number | shares																	843,140							843,140	573,885	374,400
Customer Lists [Member]
Accounting Policy [Line Items]
Intangible assets, net																								$ 18,338	$ 16,902
Customer Lists [Member] | PST [Member]
Accounting Policy [Line Items]
Intangible assets, net																								18,083
Trade Names [Member]
Accounting Policy [Line Items]
Intangible assets, net																								13,558	12,086
Trade Names [Member] | PST [Member]
Accounting Policy [Line Items]
Intangible assets, net																								13,554
Developed Technology Rights [Member] | PST [Member]
Accounting Policy [Line Items]
Intangible assets, net																								$ 7,364
PST Eletronica Ltda [Member]
Accounting Policy [Line Items]
Equity method investment, ownership percentage																													50.00%
Percentage ownership in consolidated subsidiary																	74.00%	74.00%	74.00%	74.00%	74.00%
Increase in equity method investment, ownership percentage																							24.00%
Noncontroling interest increase (decrease)																		$ 452		$ (9,240)	$ (16,990)
Unfavorable change in foreign currency translation																		2,339		(7,033)	(3,507)
Less: income (loss) attributable to noncontrolling interest																		$ (1,887)		(2,207)	(13,483)
Minda Stoneridge Instruments Ltd [Member]
Accounting Policy [Line Items]
Equity method investment, ownership percentage																	49.00%							49.00%
Equity method investments																								$ 7,952	$ 6,929
Maximum [Member]
Accounting Policy [Line Items]
Property, plant and equipment, useful life																	5 years	5 years
Minimum [Member]
Accounting Policy [Line Items]
Property, plant and equipment, useful life																	3 years	3 years
Wiring [Member]
Accounting Policy [Line Items]
Loss on disposal, net of tax																				(210)	(8,576)	[1]
Deferred foreign currency translation on disposal																					2,734
Income tax provision on loss on disposal	[2]																			(31)	1,621	[1]
Transaction costs related to sale																				223	1,384
Proceeds from (payments related to) sale of business		$ 71,386
Preliminary sales price			$ 65,700
Payment for working capital adjustment related to segment sale																				$ 1,230
Post-disposition sales to Wiring																		$ 19,766
Sales	[1]																				167,434
Cost of sales	[1],[3]																				$ 154,787
[1]	The operations of the Wiring business were presented only for the seven months ended July 31, 2014 because the sale was completed on August 1, 2014.
[2]	Gains and losses from foreign currency remeasurement related to income taxes were included as a component of income tax (expense) benefit.
[3]	The assets and liabilities of the Wiring business were reclassified as held for sale effective May 26, 2014. Accordingly, depreciation and amortization for the related Wiring assets were not recorded after that date.

Summary of Significant Accoun35

Summary of Significant Accounting Policies (Schedule of Accounts Receivable and Concentration of Credit Risk) (Details) - Sales Revenue, Net [Member]	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Ford Motor Company [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Goods, Net, Percentage	17.00%	14.00%	11.00%
General Motors Company [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Goods, Net, Percentage	7.00%	5.00%	5.00%
Scania Group [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Goods, Net, Percentage	6.00%	7.00%	8.00%

Summary of Significant Accoun36

Summary of Significant Accounting Policies (Schedule of Inventory, Current) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Summary of Significant Accounting Policies [Abstract]
Raw materials	$ 35,665	$ 36,021
Work-in-progress	7,483	7,162
Finished goods	16,969	17,826
Total inventories, net	$ 60,117	$ 61,009

Summary of Significant Accoun37

Summary of Significant Accounting Policies (Statements of Operations for Discontinued Operations) (Details) - USD ($) $ in Thousands		3 Months Ended												12 Months Ended
		Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Post-disposition purchases from Wiring														$ 425	$ 689	$ 269
Post-disposition sales to Wiring														19,766	26,952	12,230
Net sales		$ 172,612	$ 173,846	$ 186,903	$ 162,616	$ 154,641		$ 162,057		$ 165,289		$ 162,825		695,977	644,812	660,579
Cost of goods sold														500,538	467,834	469,705
Selling, general and administrative														111,145	110,371	123,630
Interest expense, net														6,277	6,365	16,880
Other expense (income), net														(147)	1,828	565
Income (loss) from discontinued operations, net of tax																(811)
Loss on disposal, net of tax						16		(113)		55		(168)			(210)	(8,576)
Income (loss) from discontinued operations						16	[1]	$ (113)	[1]	$ 55	[1]	$ (168)	[1]		(210)	(9,387)
Wiring [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Post-disposition sales to Wiring														$ 19,766
Net sales	[2]															167,434
Cost of goods sold	[2],[3]															154,787
Selling, general and administrative	[2],[3]															12,697
Interest expense, net	[2]															69
Other expense (income), net	[2]															(58)
Income (loss) from operations of discontinued operations before income taxes	[2],[3]															(61)
Income tax provision on discontinued operations	[2]															(750)
Income (loss) from discontinued operations, net of tax	[2]															(811)
Loss on disposal	[4]														(241)	(6,955)	[2]
Income tax expense on gain (loss) on disposal	[5]														31	(1,621)	[2]
Loss on disposal, net of tax															(210)	(8,576)	[2]
Income (loss) from discontinued operations															(210)	(9,387)	[2]
Transaction costs related to sale															223	1,384
Working capital and other adjustment						$ 18									$ 18
Deferred foreign currency translation on disposal																$ 2,734
[1]	A gain (loss) on disposal of the Wiring business was recorded for the quarters ended March 31, 2015, June 30, 2015, September 30, 2015 and December 31, 2015 for $(168), $55, $(113) and $16, respectively
[2]	The operations of the Wiring business were presented only for the seven months ended July 31, 2014 because the sale was completed on August 1, 2014.
[3]	The assets and liabilities of the Wiring business were reclassified as held for sale effective May 26, 2014. Accordingly, depreciation and amortization for the related Wiring assets were not recorded after that date.
[4]	Included in loss on disposal for the years ended December 31, 2015 and 2014 were transaction costs of $223 and $1,384, respectively. The loss on disposal also includes a working capital and other adjustments of $18 for the year ended December 31, 2015. In addition, the loss on disposal included $2,734 in previously deferred foreign currency translation for the year ended December 31, 2014.
[5]	Gains and losses from foreign currency remeasurement related to income taxes were included as a component of income tax (expense) benefit.

Summary of Significant Accoun38

Summary of Significant Accounting Policies (Depreciation, Amortization, and Capital Expenditures of Discontinued Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Capital expenditures	$ 24,476	$ 28,735	$ 24,754
Wiring [Member]
Depreciation and amortization			2,111
Capital expenditures			$ 1,238

Summary of Significant Accoun39

Summary of Significant Accounting Policies (Property Plant and Equipment Net) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment	$ 334,132	$ 322,757
Less: accumulated depreciation	(242,632)	(237,493)
Property, Plant and Equipment, Net, Total	91,500	85,264
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment	3,376	3,538
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment	32,271	32,904
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment	180,944	160,721
Office Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment	6,813	6,541
Tooling [Member]
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment	67,261	68,101
Information Technology [Member]
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment	23,632	24,035
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment	398	422
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment	2,583	2,581
Construction In Progress [Member]
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment	$ 16,854	$ 23,914

Summary of Significant Accoun40

Summary of Significant Accounting Policies (Estimated Useful Lives of Property, Plant and Equipment) (Details)	12 Months Ended
	Dec. 31, 2016
Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Buildings and Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	10 years
Buildings and Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	40 years
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	10 years
Office Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Office Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	10 years
Tooling [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	2 years
Tooling [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Information Technology [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Information Technology [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Vehicles [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Vehicles [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives	shorter of lease term or 3-10 years

Summary of Significant Accoun41

Summary of Significant Accounting Policies (Schedule of Goodwill) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended	12 Months Ended
	Dec. 31, 2014	Jun. 30, 2014	Sep. 30, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Goodwill, beginning balance			$ 54,348		$ 1,078	$ 54,348
Acquisition of business						664
Goodwill impairment						(51,458)
Currency translation						(2,476)
Goodwill, ending balance	$ 1,078					1,078
Electronics [Member]
Segment Reporting Information [Line Items]
Goodwill, beginning balance			604	$ 981	1,078	604
Acquisition of business						664
Currency translation				(50)	(97)	(190)
Goodwill, ending balance	1,078			$ 931	981	1,078
PST [Member]
Segment Reporting Information [Line Items]
Goodwill, beginning balance			53,744			53,744
Goodwill impairment	(27,960)	$ (29,300)	$ (23,498)			(51,458)
Currency translation						(2,286)
Goodwill, ending balance

Summary of Significant Accoun42

Summary of Significant Accounting Policies (Schedule of Acquired Finite-Lived Intangible Assets by Major Class) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Acquisition cost	$ 56,495	$ 47,232
Accumulated amortization	(17,235)	(11,514)
Intangible Assets, Net (Excluding Goodwill), Total	39,260	35,718
Customer Lists [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquisition cost	27,476	23,003
Accumulated amortization	(9,138)	(6,101)
Intangible Assets, Net (Excluding Goodwill), Total	18,338	16,902
Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquisition cost	18,116	15,129
Accumulated amortization	(4,558)	(3,043)
Intangible Assets, Net (Excluding Goodwill), Total	13,558	12,086
Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquisition cost	10,862	9,066
Accumulated amortization	(3,498)	(2,336)
Intangible Assets, Net (Excluding Goodwill), Total	7,364	6,730
Other Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquisition cost	41	34
Accumulated amortization	(41)	$ (34)
Intangible Assets, Net (Excluding Goodwill), Total

Summary of Significant Accoun43

Summary of Significant Accounting Policies (Accrued Expenses and Other Current Liabilities) (Details) - USD ($) $ in Thousands		Dec. 31, 2016	Dec. 31, 2015
Summary of Significant Accounting Policies [Abstract]
Compensation related reserves		$ 16,329	$ 17,878
Product warranty and recall obligations		6,727	4,446
Other	[1]	18,433	16,596
Total accrued expenses and other current liabilities		$ 41,489	$ 38,920
[1]	"Other" is comprised of miscellaneous accruals, none of which individually contributed a significant portion of the total.

Summary of Significant Accoun44

Summary of Significant Accounting Policies (Schedule of Product Warranty Liability) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Summary of Significant Accounting Policies [Abstract]
Product warranty and recall at beginning of period	$ 6,419	$ 7,601
Accruals for products shipped during period	4,999	4,609
Aggregate changes in pre-existing liabilities due to claim developments	(116)	(156)
Settlements made during the period	(1,958)	(5,635)
Product warranty and recall at end of period	$ 9,344	$ 6,419

Summary of Significant Accoun45

Summary of Significant Accounting Policies (Schedule of Weighted Average Number of Shares) (Details) - shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Summary of Significant Accounting Policies [Abstract]
Basic weighted-average common shares outstanding	27,763,990	27,337,954	26,923,809
Effect of dilutive shares	544,932	621,208
Diluted weighted-average common shares outstanding	28,308,922	27,959,162	26,923,809

Summary of Significant Accoun46

Summary of Significant Accounting Policies (Changes in Accumulated Other Comprehensive Loss by Component) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Summary of Significant Accounting Policies [Abstract]
Foreign currency translation, Beginning balance	$ (70,296)	$ (45,603)
Foreign currency translation, Other comprehensive income (loss) before reclassifications	2,401	(24,693)
Other comprehensive income (loss), Foreign currency transaction and translation adjustment, net of tax	2,401	(24,693)
Foreign currency translation, Ending balance	(67,895)	(70,296)	$ (45,603)
Unrealized gain (loss) on hedging activities, Beginning balance	390	1
Unrealized gain (loss) on derivatives, Other comprehensive income (loss) before reclassifications	(572)	(671)
Unrealized gain (loss) on hedging activities, Amounts reclassified from accumulated other comprehensive loss	164	1,060
Unrealized gain (loss) on derivatives, Net other comprehensive loss, net of tax	(408)	389	112
Unrealized gain (loss) on hedging activities, Ending balance	(18)	390	1
Benefit plan liability, Beginning balance	84	129
Benefit plan liability, Other comprehensive loss before reclassifications		(45)
Benefit plan liability, Amounts reclassified from accumulated other comprehensive loss	(84)
Benefit plan liability, Other comprehensive income (loss)	(84)	(45)	141
Benefit plan liability, Ending balance		84	129
Accumulated other comprehensive income (loss), Beginning balance	(69,822)	(45,473)
Total, Other comprehensive loss before reclassifications	1,829	(25,409)
Total, Amounts reclassified from accumulated other comprehensive loss	80	1,060
Total, Net other comprehensive loss, net of tax	1,909	(24,349)
Accumulated other comprehensive income (loss), Ending balance	$ (67,913)	$ (69,822)	$ (45,473)

Investments (Narrative) (Detail

Investments (Narrative) (Details) BRL in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016USD ($)	Sep. 30, 2016USD ($)	Jun. 30, 2016USD ($)	Mar. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Sep. 30, 2015USD ($)	Jun. 30, 2015USD ($)	Mar. 31, 2015USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2016BRL	Dec. 31, 2016USD ($)	Dec. 31, 2015BRL	Dec. 31, 2015USD ($)	Dec. 31, 2010
Schedule of Equity Method Investments [Line Items]
Income (loss) from equity method investments									$ 1,233	$ 608	$ 815
Noncontrolling interest													$ 13,762		$ 13,310
Less: income (loss) attributable to noncontrolling interest	$ 122	$ (303)	$ (576)	$ (1,130)	$ (1,133)	$ (69)	$ (596)	$ (409)	$ (1,887)	$ (2,207)	$ (13,483)
PST Eletronica Ltda [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage																50.00%
Percentage ownership in consolidated subsidiary									74.00%	74.00%	74.00%
Noncontrolling interest											$ 22,540		13,762		13,310
Noncontroling interest increase (decrease)									$ 452	$ (9,240)	(16,990)
Foreign currency translation adjustments									2,339	(7,033)	(3,507)
Less: income (loss) attributable to noncontrolling interest									(1,887)	(2,207)	(13,483)
Comprehensive income (loss) related to noncontrolling interest									452	(9,240)	(16,990)
Dividends payable to noncontrolling interest												BRL 10,842	$ 3,327	BRL 10,842	2,777
Minda Stoneridge Instruments Ltd [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage												49.00%	49.00%
Equity method investments													$ 7,952		$ 6,929
Income (loss) from equity method investments									$ 1,233	$ 608	$ 815

Debt (Narrative) (Details)

Debt (Narrative) (Details) SEK in Thousands	Jan. 30, 2017	Oct. 15, 2014USD ($)	Sep. 02, 2014USD ($)	Dec. 31, 2014USD ($)	Sep. 30, 2014USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2014USD ($)	Mar. 31, 2015CNY (¥)	Aug. 12, 2016USD ($)	Dec. 31, 2015SEK	Dec. 31, 2015USD ($)	Oct. 18, 2014	Sep. 12, 2014USD ($)	Oct. 04, 2010USD ($)	Nov. 02, 2007USD ($)
Debt Instrument [Line Items]
Capitalized deferred financing costs											$ 399,000
Notes covenant compliance								The Company was in compliance with all debt covenants at December 31, 2016 and 2015.
Borrowings outstanding		$ 100,000,000				$ 67,000,000		$ 67,000,000					$ 100,000,000
Total long-term debt, net						8,060,000		8,060,000					4,458,000
Less: current portion						8,626,000		8,626,000					13,905,000
Loss on early extinguishment of debt									$ (10,607,000)
2,017						8,626,000		8,626,000
2,018						4,303,000		4,303,000
2,019						2,604,000		2,604,000
2,020						611,000		611,000
2,021						67,542,000		$ 67,542,000
Senior Notes [Member]
Debt Instrument [Line Items]
Write off of deferred financing costs				$ 535,000	$ 295,000
Debt interest rate																9.50%
Debt instrument, maturity date								Oct. 15, 2017
Debt instrument, unamortized discount, percentage														2.50%
Face value of senior secured notes						$ 175,000,000		$ 175,000,000
Percentage of outstanding debt redeemed			10.00%
Debt early redemption percentage		104.75%	103.00%
Amortization of debt discount (premium)				2,019,000
De-designation date unrecognized gain on interest rate swap				348,000
Redemption of notes		$ 157,500,000	$ 17,500,000
Debt, face amount																$ 175,000,000
Loss on early extinguishment of debt				(9,687,000)	(820,000)		$ (10,507,000)
Premium paid on extinguishment of debt				7,481,000	$ 525,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Write off of deferred financing costs									100,000
Capitalized deferred financing costs				$ 1,666,000			$ 1,666,000		$ 1,666,000
Credit Facility covenant compliance								The Company was in compliance with all Credit Facility covenants at December 31, 2016 and 2015.
Debt interest rate						2.00%		2.00%
Line of credit facility, maximum borrowing capacity															$ 300,000,000		$ 100,000,000
Increase in maximum borrowing capacity of credit facility															$ 80,000,000
Credit facility, borrowing capacity																	$ 100,000,000
Borrowings outstanding						$ 67,000,000		$ 67,000,000					100,000,000
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%
Line of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						$ 2,196,000		$ 2,196,000				SEK 20,000	$ 2,369,000
Letter of Credit [Member]
Debt Instrument [Line Items]
Outstanding letters of credit						$ 3,399,000		$ 3,399,000
Term Loan Two [Member]
Debt Instrument [Line Items]
Debt, face amount | ¥										¥ 9,000,000
Term Loan Two [Member] | People's Bank of China One-Year Lending Rate [Member]
Debt Instrument [Line Items]
Interest rate multiplier										120.00%
Amendment Number 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
PST Eletronica Ltda [Member]
Debt Instrument [Line Items]
Long-term debt, weighted average interest rate						14.10%		14.10%
Short-term debt, weighted average interest rate						10.30%		10.30%
PST Eletronica Ltda [Member] | Term Loan [Member]
Debt Instrument [Line Items]
2,017						$ 8,489,000		$ 8,489,000
2,018						4,303,000		4,303,000
2,019						2,604,000		2,604,000
2,020						611,000		611,000
2,021						542,000		542,000
Subsequent Event [Member]
Debt Instrument [Line Items]
Line of credit facility,amendment date	Jan. 30, 2017
Borrowing Sub-Limit for the Company's Foreign Subsidiaries [Member] | Amendment Number Three [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility, capacity restrictions of investment activities						80,000,000		80,000,000
Increase in sub-limit for foreign subsidiary borrowings						30,000,000		30,000,000
Permitted Loans and Investments in Foreign Subsidiaries [Member] | Amendment Number Three [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Increase in permitted loans and investments in foregin subsidiaries						5,000,000
Amount of permitted loans and investments in foregin subsidiaries						$ 30,000,000		$ 30,000,000

Debt (Schedule of Debt) (Detail

Debt (Schedule of Debt) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Oct. 15, 2014	Oct. 04, 2010
Debt Instrument [Line Items]
Credit facility	$ 67,000	$ 100,000	$ 100,000
Debt:
Total debt	16,686	18,363
Long-term debt	83,686
Less: current portion	(8,626)	(13,905)
Total long-term debt, net	8,060	4,458
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility	$ 67,000	100,000
Debt:
Debt interest rate	2.00%
Debt, maturity	September 2,021
Senior Notes [Member]
Debt:
Debt interest rate				9.50%
PST Short-Term Obligations [Member]
Debt Instrument [Line Items]
Short-term obligations	$ 5,097	11,556
Debt:
Debt, maturity	2,017
PST Short-Term Obligations [Member] | Maximum [Member]
Debt:
Interest rate maximum	20.33%
PST Short-Term Obligations [Member] | Minimum [Member]
Debt:
Interest rate minimum	4.27%
PST Long-Term Notes [Member]
Debt:
Long-term debt	$ 11,452	6,428
Debt maturity period range start	2,017
Debt maturity period range end	2,021
PST Long-Term Notes [Member] | Maximum [Member]
Debt:
Interest rate maximum	19.00%
PST Long-Term Notes [Member] | Minimum [Member]
Debt:
Interest rate minimum	7.50%
Other [Member]
Debt:
Total debt	$ 137	$ 379

Debt (Future Maturities of Long

Debt (Future Maturities of Long-Term Debt) (Details) $ in Thousands	Dec. 31, 2016USD ($)
Debt [Abstract]
2,017	$ 8,626
2,018	4,303
2,019	2,604
2,020	611
2,021	67,542
Total long-term debt	$ 83,686

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2016		Sep. 30, 2016	[1]	Jun. 30, 2016	[1]	Mar. 31, 2016	[1]	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2011	Dec. 31, 2010
Operating Loss Carryforwards [Line Items]
Income tax expense (benefit) on operations	$ (39,503)	[1]	$ 919		$ 1,350		$ 845		$ (345)	$ 32	$ (381)	$ 147	$ (36,389)	$ (547)	$ (1,856)
Effective income tax rate													(92.80%)	(2.70%)	(3.50%)
Unremitted earnings of foreign subsidiaries	44,898												$ 44,898
General business tax credit carry forwards, expiration date													Dec. 31, 2021
Liability for uncertain tax positions reduction to noncurrent asset	3,731												$ 3,731
Liability for uncertain tax positions, noncurrent	146												146
Unrecognized tax benefits that would impact effective tax rate	3,821								4,280				3,821	$ 4,280
Gross interest and penalties expense (benefit)													(59)	(90)	$ (411)
Accrued payment of interest and penalties	64								$ 123				64	$ 123
Goodwill impairment charge (benefit)															$ 51,458
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards	41,222												41,222
General business and foreign tax credit carry forwards	1,530												1,530
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards	35,849												35,849
General business and foreign tax credit carry forwards	1,510												1,510
U.S. Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards	53,064												$ 53,064
Operating loss carry forwards, expiration dates													Dec. 31, 2026
General business and foreign tax credit carry forwards	$ 15,254												$ 15,254
PST Eletronica Ltda [Member]
Operating Loss Carryforwards [Line Items]
Equity method investment, ownership percentage																	50.00%
Increase in equity method investment, ownership percentage																24.00%
[1]	The Company recorded the release of a valuation allowance associated with its U.S. federal, certain state and foreign deferred tax assets for the year ended December 31, 2016.

Income Taxes (Schedule of Compo

Income Taxes (Schedule of Components of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2016	[1]	Sep. 30, 2016	[1]	Jun. 30, 2016	[1]	Mar. 31, 2016	[1]	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income (loss) before income taxes:
Domestic													$ 35,088	$ 22,959	$ 1,635
Foreign													4,097	(2,729)	(54,695)
Income (loss) before income taxes from continuing operations													39,185	20,230	(53,060)
Provision for income taxes:
Federal													760	386
State and foreign													2,575	1,232	1,382
Total current expense (benefit)													3,335	1,618	1,382
Deferred:
Federal													(37,828)
State and foreign													(1,896)	(2,165)	(3,238)
Total deferred benefit													(39,724)	(2,165)	(3,238)
Income Tax Expense (Benefit), Total	$ (39,503)		$ 919		$ 1,350		$ 845		$ (345)	$ 32	$ (381)	$ 147	$ (36,389)	$ (547)	$ (1,856)
[1]	The Company recorded the release of a valuation allowance associated with its U.S. federal, certain state and foreign deferred tax assets for the year ended December 31, 2016.

Income Taxes (Schedule of Effec

Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Abstract]
Statutory U.S. federal income tax rate	35.00%	35.00%	35.00%
State income taxes, net of federal tax benefit	1.90%	0.20%
Tax credits	(0.80%)	(2.80%)	(1.30%)
Foreign rate differential	(4.70%)	(3.30%)	0.20%
Reduction (increase) of income tax accruals	0.10%	(0.50%)	0.20%
Tax on foreign dividends, net of foreign tax credits			(0.10%)
Reduction of deferred taxes	(1.30%)	5.50%
Valuation allowances	(121.60%)	(36.00%)	(2.10%)
Loss of domestic flow-through entity not attributable to Stoneridge, Inc.			33.90%
Non-deductible compensation		(1.50%)	1.00%
Other	(1.40%)	0.70%	(0.30%)
Effective income tax rate	(92.80%)	(2.70%)	(3.50%)

Income Taxes (Schedule of Defer

Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets:
Inventories	$ 2,156	$ 2,108
Compensation and benefits	4,785	3,902
Insurance	245	281
Depreciation and amortization	1,310	1,297
Net operating loss carryforwards	28,952	39,846
General business credit carryforwards	14,135	12,990
Other reserves	7,609	5,643
Gross deferred tax assets	59,192	66,067
Less: Valuation allowance	(11,125)	(59,391)
Deferred tax assets less valuation allowance	48,067	6,676
Deferred tax liabilities:
Depreciation and amortization	(14,911)	(13,282)
Basis difference - equity investee	(31,016)	(31,016)
Other	(1,358)	(1,074)
Gross deferred tax liabilities	(47,285)	(45,372)
Net deferred tax asset	$ 782
Net deferred tax (liabilities)		$ (38,696)

Income Taxes (Classification of

Income Taxes (Classification of Net Deferred Tax Asset) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Abstract]
Current deferred income tax assets		$ 1,239
Current deferred income tax liabilities		(39)
Long-term deferred income tax assets	$ 10,542	1,436
Long-term deferred income tax liabilities	(9,760)	(41,332)
Deferred Tax Assets, Net Of Valuation Allowance	48,067	6,676
Net deferred tax asset	$ 782
Net deferred tax (liabilities)		$ (38,696)

Income Taxes (Summary of Income

Income Taxes (Summary of Income Tax Contingencies) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Abstract]
Balance as of January 1	$ 4,304	$ 3,888	$ 3,624
Tax positions related to the current year:
Additions	208	201	217
Tax positions related to prior years:
Additions		523	168
Reductions	(61)
Expiration of statutes of limitation	(612)	(308)	(121)
Balance as of December 31	$ 3,839	$ 4,304	$ 3,888

Income Taxes (Schedule of Tax Y

Income Taxes (Schedule of Tax Years Open for Examination) (Details)	12 Months Ended
	Dec. 31, 2016
Minimum [Member] | U.S. Federal [Member] | Internal Revenue Service (IRS) [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,013
Minimum [Member] | Foreign Tax Authority [Member] | Secretariat of the Federal Revenue Bureau of Brazil [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,011
Minimum [Member] | Foreign Tax Authority [Member] | State Administration of Taxation, China [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,013
Minimum [Member] | Foreign Tax Authority [Member] | Ministry of the Economy, Finance and Industry, France [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,012
Minimum [Member] | Foreign Tax Authority [Member] | Mexican Tax Authority [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,012
Minimum [Member] | Foreign Tax Authority [Member] | Tax Authority, Spain [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,012
Minimum [Member] | Foreign Tax Authority [Member] | Swiss Federal Tax Administration (FTA) [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,011
Minimum [Member] | Foreign Tax Authority [Member] | Her Majesty's Revenue and Customs (HMRC) [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,012
Maximum [Member] | U.S. Federal [Member] | Internal Revenue Service (IRS) [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,016
Maximum [Member] | Foreign Tax Authority [Member] | Secretariat of the Federal Revenue Bureau of Brazil [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,016
Maximum [Member] | Foreign Tax Authority [Member] | State Administration of Taxation, China [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,016
Maximum [Member] | Foreign Tax Authority [Member] | Ministry of the Economy, Finance and Industry, France [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,016
Maximum [Member] | Foreign Tax Authority [Member] | Mexican Tax Authority [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,016
Maximum [Member] | Foreign Tax Authority [Member] | Tax Authority, Spain [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,016
Maximum [Member] | Foreign Tax Authority [Member] | Swiss Federal Tax Administration (FTA) [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,016
Maximum [Member] | Foreign Tax Authority [Member] | Her Majesty's Revenue and Customs (HMRC) [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,016

Operating Lease Commitments (Na

Operating Lease Commitments (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Commitments and Contingencies [Abstract]
Operating leases, rent expense, net	$ 5,290	$ 5,532	$ 5,836

Operating Lease Commitments (Sc

Operating Lease Commitments (Schedule of Future Minimum Rental Payments for Operating Leases) (Details) $ in Thousands	Dec. 31, 2016USD ($)
Year ended December 31,
2,017	$ 5,042
2,018	3,922
2,019	3,356
2,020	2,584
2,021	2,298
Thereafter	6,176
Total	$ 23,378

Share-Based Compensation Plan60

Share-Based Compensation Plans (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands

1 Months Ended

12 Months Ended

May 31, 2016

May 31, 2013

May 31, 2010

Apr. 30, 2006

Apr. 30, 2005

Dec. 31, 2016

Dec. 31, 2015

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-based compensation vested in period, fair value

$ 5,394

$ 9,101

$ 3,509

Tax benefit realized from stock based compensation

$ 977

$ 0

$ 0

Time Based Awards [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Common shares, forfeited

(29,468)

Share-based compensation restricted common shares issued

583,404

Weighted average grant date fair value, granted

$ 13.52

$ 11.41

$ 11.54

Remaining unrecognized share-based compensation expense

$ 2,850

Employee service share-based compensation, nonvested, period for recognition

1 year 2 months 9 days

Performance Based Awards [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Common shares, forfeited

(25,567)

Share-based compensation restricted common shares issued

785,100

Weighted average grant date fair value, granted

$ 13.66

Remaining unrecognized share-based compensation expense

$ 3,069

Employee service share-based compensation, nonvested, period for recognition

1 year 3 months 15 days

Plan 2006 [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-based compensation award reserved for issuance of common shares

4,500,000

3,000,000

1,500,000

Share-based compensation, increase in awards reserved for issuance of common shares

1,500,000

1,500,000

Share-based compensation award, number of shares available for grant

0

Share-based compensation restricted common shares issued

1,358,504

Share-based compensation expiration date

May 1, 2016

Share-based compensation, maximum number of shares issuable

500,000

Plan 2006 [Member] | Time Based Awards [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-based compensation award vesting period

3 years

3 years

3 years

3 years

3 years

3 years

3 years

Plan 2006 [Member] | Performance Based Awards [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-based compensation award vesting period

3 years

3 years

3 years

3 years

3 years

3 years

3 years

2016 Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-based compensation award reserved for issuance of common shares

1,800,000

Share-based compensation award granted in period

68,673

Share-based compensation award, number of shares available for grant

1,731,327

2016 Plan [Member] | Time Based Awards [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-based compensation award granted in period

28,633

2016 Plan [Member] | Performance Based Awards [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-based compensation award granted in period

40,040

Director Share Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-based compensation award reserved for issuance of common shares

700,000

500,000

Share-based compensation, increase in awards reserved for issuance of common shares

200,000

Share-based compensation award vesting period

1 year

1 year

1 year

1 year

1 year

1 year

1 year

Share-based compensation restricted common shares issued

580,609

Share-based compensation, maximum number of shares issuable

119,391

Share-Based Compensation Plan61

Share-Based Compensation Plans (Schedule of the Allocation of Performance Shares Between Total Shareholder Return and Earnings per Share) (Details) - Performance Based Awards [Member]	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shareholder return	55.00%	36.00%	20.00%
Earnings per share	45.00%	64.00%	80.00%

Share-Based Compensation Plan62

Share-Based Compensation Plans (Disclosure of Share-based Compensation Arrangements by Share-based Payment Award) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Time Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares, non-vested as of December 31, 2015	731,241
Common shares, granted	250,227
Common shares, vested	(339,963)
Common shares, forfeited	(29,468)
Common shares, non-vested as of December 31, 2016	612,037	731,241
Weighted average grant date fair value, non-vested as of December 31, 2015	$ 9.45
Weighted average grant date fair value, granted	13.52	$ 11.41	$ 11.54
Weighted average grant date fair value, vested	7.07
Weighted average grant date fair value, forfeited	11.82
Weighted average grant date fair value, non-vested as of December 31, 2016	$ 12.32	$ 9.45
Performance Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares, non-vested as of December 31, 2015	712,485
Common shares, granted	269,255
Common shares, vested	(131,033)
Common shares, forfeited	(25,567)
Common shares, non-vested as of December 31, 2016	825,140	712,485
Weighted average grant date fair value, non-vested as of December 31, 2015	$ 10.70
Weighted average grant date fair value, granted	13.66
Weighted average grant date fair value, vested	7.58
Weighted average grant date fair value, forfeited	11.30
Weighted average grant date fair value, non-vested as of December 31, 2016	$ 12.14	$ 10.70

Employee Benefit Plans (Details

Employee Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expenses related to employee benefit plans	$ 1,601	$ 1,487	$ 1,280
Long Term Cash Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred compensation liability, current	$ 0	$ 808
Awards granted in period	0	0	0

Financial Instruments and Fai64

Financial Instruments and Fair Value Measurements (Narrative) (Details)		3 Months Ended		9 Months Ended	12 Months Ended
		Dec. 31, 2014USD ($)security	Jun. 30, 2014USD ($)security	Sep. 30, 2014USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)securitylb	Oct. 04, 2010USD ($)
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets fair value adjustment					$ 0	$ 0
Goodwill impairment charge (benefit)							$ 51,458,000
Mexican Peso-Denominated Foreign Currency Forward Contracts [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Number of hedge contracts | security		5					5
Interest Rate Swap [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Gain on termination of Interest Rate Swap		$ 371,000
Reduced interest expense as a result of swap							$ 641,000
Senior Notes [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Face value of senior secured notes					$ 175,000,000
Fixed interest rate								9.50%
Debt instrument, maturity date					Oct. 15, 2017
Cash Flow Hedging [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Amount from cash flow hedge derivatives to be reclassified in the next year					$ 28,000
Cash Flow Hedging [Member] | Copper Commodity [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Number of hedge contracts expected to be fulfilled | security		2					2
Fixed price commodity contracts (in pounds) | lb							317,000
Designated as Hedging Instrument [Member] | Mexican Peso-Denominated Foreign Currency Forward Contracts [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Number of hedge contracts expected to be fulfilled | security		2					2
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Forward Currency Contracts [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Notional amounts	[1]				5,699,000	22,208,000
Designated as Hedging Instrument [Member] | 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						2,421,000
Designated as Hedging Instrument [Member] | 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						10,007,000
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					5,699,000	9,780,000
Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] | Interest Rate Swap [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Interest rate swap, notional amount								$ 45,000,000
Not Designated as Hedging Instrument [Member] | Forward Currency Contracts [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Notional amounts	[1]				1,601,000	1,647,000
Not Designated as Hedging Instrument [Member] | Euro-Denominated Foreign Currency Forward Contracts [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Notional amounts					1,601,000	1,647,000
Gain (loss) on derivative instruments held for trading purposes, net					57,000	336,000	$ 1,205,000
Not Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Copper Commodity [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Gain on derivatives not designated as hedging instruments			$ 77,000				77,000
London Interbank Offered Rate (LIBOR) [Member] | Fair Value Hedging [Member] | Interest Rate Swap [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discription of variable rate basis of derivative								7.20%
Variable interest rate in addition to LIBOR								7.20%
Wiring [Member] | Not Designated as Hedging Instrument [Member] | Mexican Peso-Denominated Foreign Currency Forward Contracts [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Number of hedge contracts | security			3
Gain recognized on dedesignation of hedge			$ 320,000
PST [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Goodwill impairment charge (benefit)		$ 27,960,000	$ 29,300,000	$ 23,498,000			$ 51,458,000
Fair Value, Inputs, Level 1 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets carried at fair value					0	0
Financial liabilities carried at fair value					0	0
Fair Value, Inputs, Level 2 [Member] | Forward Currency Contracts [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Forward currency contracts, financial assets					0	474,000
Forward currency contracts, financial liabilities					31,000	93,000
Fair Value, Inputs, Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets carried at fair value					0	0
Financial liabilities carried at fair value					$ 0	$ 0
[1]	Notional amounts represent the gross contract / notional amount of the derivatives outstanding.

Financial Instruments and Fai65

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		Dec. 31, 2016	Dec. 31, 2015
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional amounts	[1]	$ 1,601	$ 1,647
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional amounts	[1]	5,699	22,208
Other Assets [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Cash flow hedges, other derivative assets			474
Other Liabilities [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivatives not designated as hedging instruments, liabilities		3	9
Other Liabilities [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Cash flow hedges, other derivative, liabilities		$ 28	$ 84
[1]	Notional amounts represent the gross contract / notional amount of the derivatives outstanding.

Financial Instruments and Fai66

Financial Instruments and Fair Value Measurements (Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Commodity Contract [Member]
Derivatives designated as cash flow hedges:
Gain (loss) recorded in other comprehensive income (loss)			$ (408)
Gain (loss) reclassified from other comprehensive income (loss) into net income (loss)			(256)
Designated as Hedging Instrument [Member]
Derivatives designated as cash flow hedges:
Gain (loss) recorded in other comprehensive income (loss)	$ (582)	$ (671)	(454)
Gain (loss) reclassified from other comprehensive income (loss) into net income (loss)	(164)	(1,060)	(566)
Designated as Hedging Instrument [Member] | Forward Currency Contracts [Member]
Derivatives designated as cash flow hedges:
Gain (loss) recorded in other comprehensive income (loss)	(582)	(671)	(46)
Gain (loss) reclassified from other comprehensive income (loss) into net income (loss)	$ (164)	$ (1,060)	$ (310)

Commitments and Contingencies (

Commitments and Contingencies (Narrative) (Details) € in Thousands, BRL in Thousands, $ in Thousands	12 Months Ended			24 Months Ended
	Dec. 31, 2016USD ($)customer	Dec. 31, 2015BRL	Dec. 31, 2014	Dec. 31, 2010	Dec. 31, 2016EUR (€)	Dec. 31, 2016BRL	Dec. 31, 2016USD ($)	Jul. 28, 2016EUR (€)	Jul. 28, 2016USD ($)	Dec. 31, 2015USD ($)
Short-term Debt [Line Items]
Number of plaintiffs | customer	120,000
Maximum damages sought per plaintiff	$ 1
Litigation liability							$ 0
Product warranty and recall accrual							2,617			$ 1,973
Electronics [Member]
Short-term Debt [Line Items]
Loss contingency, estimate of possible loss					€ 14,000		14,800
Accounts payable and accrued liabilities							0
Control Devices [Member]
Short-term Debt [Line Items]
Environmental remediation accrued undiscounted liability							446			532
Accrued Expenses and Other Current Liabilities [Member] | Control Devices [Member]
Short-term Debt [Line Items]
Environmental remediation accrued undiscounted liability							370			469
Letter of Credit [Member] | Control Devices [Member]
Short-term Debt [Line Items]
Line of credit							2,000
PST Eletronica Ltda [Member]
Short-term Debt [Line Items]
Equity method investment, ownership percentage				50.00%
Loss contingencies aggregate tax assessment not accrued						BRL 92,500	28,400
Percentage of state value added tax				25.00%
Percentage ownership in consolidated subsidiary	74.00%	74.00%	74.00%
PST Eletronica Ltda [Member] | Civil, Labor and Other Tax Contingencies [Member]
Short-term Debt [Line Items]
Loss contingency, estimate of possible loss		BRL 25,400				31,800	9,800			$ 6,500
PST Eletronica Ltda [Member] | Value Added Tax [Member]
Short-term Debt [Line Items]
Loss contingencies aggregate tax assessment not accrued						13,200	4,100
PST Eletronica Ltda [Member] | Interest On Tax [Member]
Short-term Debt [Line Items]
Loss contingencies aggregate tax assessment not accrued						11,400	3,500
PST Eletronica Ltda [Member] | Penalties On Tax [Member]
Short-term Debt [Line Items]
Loss contingencies aggregate tax assessment not accrued						BRL 67,900	$ 20,800
Minda Stoneridge Instruments Ltd [Member]
Short-term Debt [Line Items]
Equity method investment, ownership percentage					49.00%	49.00%	49.00%
Actia Automotive Case One [Member] | Electronics [Member]
Short-term Debt [Line Items]
Court ordered payment foregone under settlement								€ 50	$ 56

Headquarter Relocation (Narrati

Headquarter Relocation (Narrative) (Details) - USD ($) $ in Thousands	2 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Oct. 31, 2016	Sep. 30, 2016
Prepaid expenses and other current assets	$ 17,162	$ 17,162	$ 21,602
Accrued expenses and other current liabilities	$ 41,489	41,489	38,920
Proceeds from sale of fixed assets		652	64	$ 110
Gain on sale of fixed assets		(48)	$ (74)	$ (110)
Tenant improvements					$ 1,104
Tenant improvement liability					$ 1,104
Lease term	10 years
Non-Cash Build-to-Suit Lease Asset [Member]
Prepaid expenses and other current assets						$ 4,322
Non-Cash Build-to-Suit Lease Liability [Member]
Accrued expenses and other current liabilities						$ 4,322
Headquarter Relocation [Member]
Headquarter relocation costs		$ 1,769

Restructuring and Business Re69

Restructuring and Business Realignment (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 2,617	$ 1,029	$ 1,578
Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	273	458	733	$ 780
Restructuring charges	59	183	494
Control Devices [Member]
Restructuring Cost and Reserve [Line Items]
Business realignment charges	0	0	0
Restructuring expense	0	0	0
Facility Closing [Member] | Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	273	458
Facility Closing [Member] | Other Noncurrent Liabilities [Member] | Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	0	313
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,080	528	559
Selling, General and Administrative Expenses [Member] | Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	59	183	494
Selling, General and Administrative Expenses [Member] | Corporate [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		309
Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 437	$ 172	$ 847

Restructuring and Business Re70

Restructuring and Business Realignment (Schedule of Restructuring and Related Costs) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Charge to expense		$ 2,617	$ 1,029	$ 1,578
Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense		437	172	847
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense		1,080	528	559
Design and Development [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense		1,100	329	172
Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance		458	733	780
Charge to expense		59	183	494
Foreign currency translation effect		(69)	3	(45)
Cash payments		(175)	(461)	(496)
Restructuring Reserve, Ending Balance		273	458	733
Electronics [Member] | Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense		59	183	494
Severance costs		196	102
Electronics [Member] | Design and Development [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs		984	215
PST Segment [Member] | Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs		437	172	847
PST Segment [Member] | Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs		884	117	559
PST Segment [Member] | Design and Development [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs		116	114	172
Corporate [Member] | Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense			309
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense		2,617	1,029	1,578
Employee Severance [Member] | Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense	[1]	1,180	317
Employee Severance [Member] | PST Segment [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense	[2]	$ 1,437	403	$ 1,578
Employee Severance [Member] | Corporate [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense	[3]		$ 309
[1]	Severance costs for the year ended December 31, 2016 related to selling, general and administrative (“SG&A”) and design and development (“D&D”) were $196 and $984, respectively. Severance costs for the year ended December 31, 2015 related to SG&A and D&D were $102 and $215, respectively.
[2]	Severance costs for the year ended December 31, 2016 related to cost of goods sold (“COGS”), SG&A and D&D were $437, $884 and $116, respectively. Severance costs for the year ended December 31, 2015 related to COGS, SG&A and D&D were $172, $117 and $114, respectively. Severance costs for year ended December 31, 2014 related to COGS, SG&A and D&D were $847, $559 and $172, respectively.
[3]	Severance costs for the year then ended December 31, 2015 related to SG&A were $309.

Restructuring and Business Re71

Restructuring and Business Realignment (Schedule of Business Realignment Charges Classified by Statement of Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Charge to expense	$ 2,617	$ 1,029	$ 1,578
Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense	437	172	847
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense	1,080	528	559
Design and Development [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense	1,100	329	172
Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense	59	183	494
Electronics [Member] | Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense	$ 59	183	$ 494
Corporate [Member] | Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense		$ 309

Segment Reporting (Narrative) (

Segment Reporting (Narrative) (Details)	12 Months Ended
	Dec. 31, 2016segment
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	12 Months Ended
		Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Jun. 30, 2014	Sep. 30, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net Sales:
Total net sales													$ 695,977	$ 644,812	$ 660,579
Income (Loss) Before Income Taxes:
Total operating income (loss)		$ 10,170	$ 11,780	$ 13,626	$ 8,506	$ 8,327	$ 8,947	$ 7,415	$ 3,126				44,082	27,815	(25,823)
Total income before income taxes													39,185	20,230	(53,060)
Interest Expense, net:
Interest expense, net													6,277	6,365	16,880
Capital Expenditures:
Capital expenditures													24,476	28,735	24,754
Long-Lived Assets		153,636				132,343							153,636	132,343
Total Assets:
Total assets		394,529				364,252							394,529	364,252
Goodwill impairment charge (benefit)															51,458
Continuing Operations [Member]
Net Sales:
Total net sales													695,977	644,812	660,579
Income (Loss) Before Income Taxes:
Total income before income taxes													44,082	27,815	(25,823)
Depreciation and Amortization:
Total depreciation and amortization	[1]												23,258	22,409	27,105
Interest Expense, net:
Interest expense, net													6,277	6,365	16,880
Capital Expenditures:
Capital expenditures													24,476	28,735	23,516
Total Assets:
Total assets		394,529				364,252							394,529	364,252
Eliminations [Member] | Continuing Operations [Member]
Net Sales:
Total net sales													(35,187)	(24,959)	(38,243)
Total Assets:
Total assets		(250,494)				(249,789)							(250,494)	(249,789)
Electronics [Member] | Continuing Operations [Member]
Net Sales:
Total net sales													238,617	239,448	249,304
Income (Loss) Before Income Taxes:
Total income before income taxes													14,798	13,784	17,444
Depreciation and Amortization:
Total depreciation and amortization													3,971	3,666	4,432
Interest Expense, net:
Interest expense, net													142	161	695
Capital Expenditures:
Capital expenditures													5,665	6,538	3,541
Total Assets:
Total assets		99,964				97,443							99,964	97,443
Electronics [Member] | Operating Segments [Member] | Continuing Operations [Member]
Net Sales:
Total net sales													205,256	216,544	214,141
Electronics [Member] | Inter-Segment Sales [Member] | Continuing Operations [Member]
Net Sales:
Total net sales													33,361	22,904	35,163
Control Devices [Member] | Continuing Operations [Member]
Net Sales:
Total net sales													409,958	335,065	309,738
Income (Loss) Before Income Taxes:
Total income before income taxes													61,815	44,690	35,387
Depreciation and Amortization:
Total depreciation and amortization													10,276	9,260	9,545
Interest Expense, net:
Interest expense, net													226	326	303
Capital Expenditures:
Capital expenditures													13,261	15,094	13,658
Total Assets:
Total assets		150,623				127,649							150,623	127,649
Control Devices [Member] | Operating Segments [Member] | Continuing Operations [Member]
Net Sales:
Total net sales													408,132	333,010	306,658
Control Devices [Member] | Inter-Segment Sales [Member] | Continuing Operations [Member]
Net Sales:
Total net sales													1,826	2,055	3,080
Corporate [Member] | Continuing Operations [Member]
Income (Loss) Before Income Taxes:
Total operating income (loss)	[2]												29,069	23,117	19,067
Depreciation and Amortization:
Total depreciation and amortization													452	211	130
Interest Expense, net:
Interest expense, net													2,513	2,921	13,118
Capital Expenditures:
Capital expenditures	[3]												2,337	1,214	156
Total Assets:
Total assets	[3]	287,031				288,806							287,031	288,806
PST [Member]
Total Assets:
Goodwill impairment charge (benefit)										$ 27,960	$ 29,300	$ 23,498			51,458
PST [Member] | Continuing Operations [Member]
Net Sales:
Total net sales													82,589	95,258	139,780
Income (Loss) Before Income Taxes:
Total income before income taxes													(3,462)	(7,542)	(59,587)
Depreciation and Amortization:
Total depreciation and amortization													8,559	9,272	12,998
Interest Expense, net:
Interest expense, net													3,396	2,957	2,764
Capital Expenditures:
Capital expenditures													3,213	5,889	6,161
Total Assets:
Total assets		$ 107,405				$ 100,143							107,405	100,143
PST [Member] | Operating Segments [Member] | Continuing Operations [Member]
Net Sales:
Total net sales													82,589	95,258	139,780
PST [Member] | Inter-Segment Sales [Member] | Continuing Operations [Member]
Net Sales:
Total net sales
[1]	These amounts represent depreciation and amortization on property, plant and equipment and certain intangible assets.
[2]	Unallocated Corporate expenses include, among other items, accounting, finance, legal, information technology costs as well as share-based compensation.
[3]	Corporate assets consist primarily of cash, intercompany loan receivables, capital expenditures for the new headquarter building, equity investments and investments in subsidiaries.

Segment Reporting (Schedule o74

Segment Reporting (Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net Sales:
Total net sales	$ 695,977	$ 644,812	$ 660,579
Long-term Assets:
Total long-term assets	153,636	132,343
Total long-term assets	153,636	132,343
North America [Member]
Net Sales:
Total net sales	428,046	369,032	330,516
Long-term Assets:
Total long-term assets	73,835	60,099
South America [Member]
Net Sales:
Total net sales	82,589	95,258	139,780
Long-term Assets:
Total long-term assets	63,497	56,943
Europe and Other [Member]
Net Sales:
Total net sales	185,342	180,522	$ 190,283
Long-term Assets:
Total long-term assets	$ 16,304	$ 15,301

Unaudited Quarterly Financial75

Unaudited Quarterly Financial Data (Schedule of Quarterly Financial Information) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended																			9 Months Ended	12 Months Ended
	Dec. 31, 2016		Sep. 30, 2016		Jun. 30, 2016		Mar. 31, 2016		Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Sep. 30, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net sales	$ 172,612		$ 173,846		$ 186,903		$ 162,616		$ 154,641		$ 162,057		$ 165,289		$ 162,825						$ 695,977	$ 644,812	$ 660,579
Gross profit	47,779		49,748		52,751		45,161		42,239		45,145		45,946		43,648
Operating income (loss)	10,170		11,780		13,626		8,506		8,327		8,947		7,415		3,126						44,082	27,815	(25,823)
Provision (benefit) for income taxes	(39,503)	[1]	919	[1]	1,350	[1]	845	[1]	(345)		32		(381)		147						(36,389)	(547)	(1,856)
Income (loss) from continuing operations	48,489		9,981		10,995		6,109		4,935		7,411		6,328		2,103						75,574	20,777	(51,204)
Income (loss) from discontinued operations									16	[2]	(113)	[2]	55	[2]	(168)	[2]						(210)	(9,387)
Net income (loss)	48,489		9,981		10,995		6,109		4,951		7,298		6,383		1,935						75,574	20,567	(60,591)
Less: income (loss) attributable to noncontrolling interest	122		(303)		(576)		(1,130)		(1,133)		(69)		(596)		(409)						(1,887)	(2,207)	(13,483)
Net income (loss) attributable to Stoneridge, Inc.	$ 48,367		$ 10,284		$ 11,571		$ 7,239		$ 6,084		$ 7,367		$ 6,979		$ 2,344						$ 77,461	$ 22,774	$ (47,108)
Earnings (loss) per share attributable to continuing operations attributable to Stoneridge, Inc.:
Basic (in dollars per share)	$ 1.74	[3]	$ 0.37	[3]	$ 0.42	[3]	$ 0.26	[3]	$ 0.22	[3]	$ 0.27	[3]	$ 0.26	[3]	$ 0.10	[3]					$ 2.79	$ 0.84	$ (1.40)
Diluted (in dollars per share)	1.70	[3]	0.36	[3]	0.41	[3]	0.26	[3]	0.22	[3]	0.27	[3]	0.25	[3]	0.09	[3]					2.74	0.82	(1.40)
Earnings (loss) per share attributable to discontinued operations:
Basic (in dollars per share)									0	[3]	(0.01)	[3]	0	[3]	(0.01)	[3]					0	(0.01)	(0.35)
Diluted (in dollars per share)									0	[3]	(0.01)	[3]	0	[3]	(0.01)	[3]					0	(0.01)	(0.35)
Earnings (loss) per share attributable to Stoneridge, Inc.:
Basic (in dollars per share)	1.74	[3]	0.37	[3]	0.42	[3]	0.26	[3]	0.22	[3]	0.26	[3]	0.26	[3]	0.09	[3]					2.79	0.83	(1.75)
Diluted (in dollars per share)	$ 1.70	[3]	$ 0.36	[3]	$ 0.41	[3]	$ 0.26	[3]	$ 0.22	[3]	$ 0.26	[3]	$ 0.25	[3]	$ 0.08	[3]					$ 2.74	$ 0.81	$ (1.75)
Goodwill impairment charge (benefit)																							$ 51,458
Goodwill impairment loss (gain) attributable to noncontrolling interest																	$ 6,142
Increase (decrease) in valuation allowance																					$ (49,600)
(Loss) on early extinguishment of debt																							(10,607)
Loss on disposal, net of tax									$ 16		$ (113)		$ 55		$ (168)							$ (210)	(8,576)
PST [Member]
Earnings (loss) per share attributable to Stoneridge, Inc.:
Goodwill impairment charge (benefit)																	$ 27,960		$ 29,300	$ 23,498			51,458
Goodwill impairment loss (gain) attributable to noncontrolling interest																		$ (1,274)	$ 6,436	$ 5,162			$ 11,304
[1]	The Company recorded the release of a valuation allowance associated with its U.S. federal, certain state and foreign deferred tax assets for the year ended December 31, 2016.
[2]	A gain (loss) on disposal of the Wiring business was recorded for the quarters ended March 31, 2015, June 30, 2015, September 30, 2015 and December 31, 2015 for $(168), $55, $(113) and $16, respectively
[3]	Earnings per share for the year may not equal the sum of the four historical quarters earnings per share due to changes in weighted-average basic and diluted shares outstanding.

Subsequent Events (Narrative) (

Subsequent Events (Narrative) (Details) € in Thousands, $ in Thousands	Jan. 30, 2017	Jan. 31, 2017EUR (€)	Jan. 31, 2017USD ($)	Dec. 31, 2014USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revolving credit facility borrowings				$ 100,000
Subsequent Event [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Credit agreement, amendment date	Jan. 30, 2017
Subsequent Event [Member] | Orlaco [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Business acquisition agreement date		Jan. 31, 2017	Jan. 31, 2017
Fair value of consideration transferred		€ 74,939	$ 79,675
Business acquisition, cash paid for acquired entity		67,439	71,701
Business acquisition, escrow		7,500	7,974
Business acquisition, contingent consideration | €		€ 7,500
Revolving Credit Facility [Member] | Subsequent Event [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revolving credit facility borrowings			$ 81,000

SCHEDULE II - VALUATION AND Q77

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016		Dec. 31, 2015	Dec. 31, 2014
Increase (decrease) in valuation allowance	$ (49,600)
Accounts Receivable Reserves
Balance at beginning of period	1,066		$ 2,017	$ 2,625
Charged to cost and expenses	1,604		395	619
Write-offs	(1,040)		(1,346)	(1,227)
Balance at end of period	1,630		1,066	2,017
Valuation Allowance Of Deferred Tax Assets [Member]
Balance at beginning of period	59,391		67,907	71,827
Net additions charged to income (expense)	(47,659)	[1]	(7,957)	(2,786)
Write-offs	(607)		(559)	(1,134)
Balance at end of period	$ 11,125		$ 59,391	$ 67,907
[1]	The Company recorded the release of a valuation allowance associated with its U.S. federal, certain state and foreign deferred tax assets of $49.6 million.