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Summary of Significant Accounting Policies (Narrative) (Details)
$ / shares in Units, BRL in Thousands, $ in Thousands
 3 Months Ended 5 Months Ended 7 Months Ended 9 Months Ended 12 Months Ended 36 Months Ended
Aug. 01, 2014
USD ($)
May. 26, 2014
USD ($)
Dec. 31, 2015
USD ($)
Sep. 30, 2015
USD ($)
Jun. 30, 2015
USD ($)
Mar. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Sep. 30, 2014
USD ($)
Jun. 30, 2014
USD ($)
Mar. 31, 2014
USD ($)
Dec. 31, 2014
USD ($)
Jul. 31, 2014
USD ($)
Sep. 30, 2014
USD ($)
Dec. 31, 2015
BRL
shares
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
$ / shares
shares
Dec. 31, 2011
Dec. 31, 2015
USD ($)
Dec. 31, 2015
USD ($)
shares
Dec. 31, 2014
USD ($)
shares
Oct. 18, 2014
USD ($)
Dec. 31, 2013
USD ($)
$ / shares
shares
Dec. 31, 2010
Accounting Policy [Line Items]                                                
Depreciation expense                             $ 18,829 $ 22,299 $ 24,099              
Impairment of intangible assets                             0 0 0              
Loss on disposal, net of tax     $ 16 $ (113) $ 55 $ (168) $ (890) $ (6,548) $ (1,138)           (210) (8,576)                
Dividend from noncontrolling interest                                 212              
Less: income (loss) attributable to noncontrolling interest     (1,133) (69) (596) (409) (6,444) [1] 1,160 [1] (7,221) [1] $ (978) [1]         (2,207) (13,483) 1,377              
Preproduction costs related to long-term supply arrangements, costs capitalized                                       $ 9,405 $ 10,067      
Proceeds from (payments related to) sale of Wiring business                             (1,230) 71,386                
Goodwill impairment charge (benefit)                               51,458                
Acquisition of business                               664                
Goodwill             1,078       $ 1,078         1,078 54,348       1,078   $ 54,348  
Currency translation                               (2,476)                
Goodwill, ending balance             1,078       1,078         1,078 54,348              
Intangible assets, net                                       35,718 56,637      
Amortization                             $ 3,445 4,784 5,187              
Amortization expense next year                                       3,000        
Amortization expense year two                                       3,000        
Amortization expense year three                                       3,000        
Amortization expense year four                                       3,000        
Amortization expense year five                                       3,000        
Amortization expense year six                                       3,000        
Intangible assets, weighted-average remaining amortization period, years                           13 years 13 years                  
Valuation allowance                                       59,391 67,907      
Research and development expense                             $ 38,792 $ 41,609 $ 40,372              
Research and development expense percentage                           6.00% 6.00% 6.30% 6.10%              
Research and development expense reimbursed                             $ 9,659 $ 12,319 $ 16,982              
Share-based compensation expense                             7,224 5,406 4,974              
Share-based compensation expense capitalized as inventory                             0 0 0              
Share-based compensation vested in period, fair value                             9,101 3,509 2,177              
Antidilutive securities excluded from computation of earnings per share, average price per share | $ / shares                                             $ 15.73  
Amortization of financing costs                             388 850 908              
Deferred financing costs, net                                       1,428 1,767 $ 597    
Accumulated goodwill                                       300,083 300,083      
Goodwill impairment loss (gain) attributable to noncontrolling interest             6,142                                  
Product warranty and recall accrual                                       1,973 1,204      
Inventory amount, FIFO                                       35,378 34,636      
Inventory amount, weighted average cost                                       25,631 36,617      
Foreign currency transaction gain (loss)                             (1,693) (1,212) (2,109)              
Sales     154,641 $ 162,057 $ 165,289 $ 162,825 166,811 170,338 162,099 $ 161,331         644,812 660,579 659,486              
Cost of sales                             467,834 469,705 453,531              
Selling, General and Administrative Expenses [Member]                                                
Accounting Policy [Line Items]                                                
Share-based compensation expense                             7,224 5,406 4,974              
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                  
Noncontrolling Interest [Member]                                                
Accounting Policy [Line Items]                                                
Dividend from noncontrolling interest                                 212              
Less: income (loss) attributable to noncontrolling interest                             (2,207) (13,483) 1,377              
Electronics [Member]                                                
Accounting Policy [Line Items]                                                
Acquisition of business                               664                
Goodwill     981       1,078       1,078       981 1,078 604   $ 981 981 $ 1,078   $ 604  
Currency translation                             (97) (190)                
Goodwill, ending balance     $ 981       1,078       $ 1,078       981 1,078 604   $ 981          
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 24,994 6,401                  
Gain (loss) on sale of accounts receivable                           (540) (156)                  
Proceeds from sale of accounts receivable                           24,454 6,245                  
Remaining credit exposure                           BRL 10,376           $ 2,657        
Goodwill impairment charge (benefit)             $ 27,960 (5,802) 29,300       $ 23,498     $ 51,458                
Goodwill                           53,744         $ 53,744  
Currency translation                               $ (2,286)                
Goodwill, ending balance                           $ 53,744              
Goodwill impairment loss (gain) attributable to noncontrolling interest             $ 6,142 $ (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%    
Equity Option [Member]                                                
Accounting Policy [Line Items]                                                
Antidilutive shares outstanding weighted average exercise price | $ / shares                                 $ 15.73              
Antidilutive securities excluded from computation of earnings per share | shares                                 20,000              
Long Term Cash Incentive Plan [Member]                                                
Accounting Policy [Line Items]                                                
Share-based compensation expense                             828 243 $ 155              
Performance Based Restricted Common Shares [Member]                                                
Accounting Policy [Line Items]                                                
Common shares, non-vested | shares                           134,250           134,250 466,650   663,750  
Share-based compensation arrangement by share-based payment award, equity instruments other than options, nonvested, number | shares                           134,250           134,250 466,650   663,750  
Performance Based Right to Received Common Shares [Member]                                                
Accounting Policy [Line Items]                                                
Common shares, non-vested | shares                           573,885           573,885 374,400      
Share-based compensation arrangement by share-based payment award, equity instruments other than options, nonvested, number | shares                           573,885           573,885 374,400      
Customer Lists [Member]                                                
Accounting Policy [Line Items]                                                
Intangible assets, net                                       $ 16,902 $ 26,999      
Customer Lists [Member] | PST [Member]                                                
Accounting Policy [Line Items]                                                
Intangible assets, net                                       16,602        
Trademarks [Member]                                                
Accounting Policy [Line Items]                                                
Intangible assets, net                                       12,086 $ 18,886      
Trademarks [Member] | PST [Member]                                                
Accounting Policy [Line Items]                                                
Intangible assets, net                                       12,067        
Developed Technology Rights [Member] | PST [Member]                                                
Accounting Policy [Line Items]                                                
Intangible assets, net                                       $ 6,730        
PST Eletronicaltda [Member]                                                
Accounting Policy [Line Items]                                                
Equity method investment, ownership percentage                                               50.00%
Percentage ownership in consolidated subsidiary                                     74.00%          
Increase in equity method investment, ownership percentage                                   24.00%            
Noncontroling interest increase (decrease)                             (9,240) (16,990) (4,541)              
Unfavorable change in foreign currency translation                             7,033 3,507 5,706              
Dividend from noncontrolling interest                                 (212)              
Less: income (loss) attributable to noncontrolling interest                             $ (2,207) (13,483) 1,377              
Minda Stoneridge Instruments Ltd [Member]                                                
Accounting Policy [Line Items]                                                
Equity method investment, ownership percentage                           49.00%           49.00% 49.00%   49.00%  
Equity method investments                                       $ 6,929 $ 6,653      
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) [2]                
Deferred foreign currency translation on disposal                               2,734                
Income tax provision on loss on disposal [3]                             (31) 1,621 [2]                
Transaction costs related to Wiring sale                             223 1,384                
Post-disposition purchases from Wiring                     $ 269       689                  
Post-disposition sales to Wiring                     12,230       26,952                  
Proceeds from (payments related to) sale of Wiring business $ 71,386                                              
Preliminary sales price   $ 65,700                                            
Post-disposition sales to Wiring                     12,230       26,952                  
Post-disposition purchases from Wiring                     $ 269       $ 689                  
Predisposition intercompany sales                                 25,353              
Predisposition intercompany purchases                                 7,593              
Sales                               167,434 [2] 288,344              
Cost of sales [4]                               $ 154,787 [2] $ 268,278              
[1] Goodwill impairment charge (benefit) of $29,300, $(5,802), and $27,960 related to the PST segment was recorded for the quarters ended June 30, 2014, September 30, 2014 and December 31, 2014, respectively, of which $6,436, $(1,274) and $6,142, respectively, was attributable to noncontrolling interest.
[2] The operations of the Wiring business were presented only for the seven months ended July 31, 2014 as the sale was completed on August 1, 2014.
[3] Gains and losses from foreign currency remeasurement related to income taxes were included as a component of income tax (expense) benefit.
[4] 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.