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Debt (Narrative) (Details)
 12 Months Ended 12 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2013
USD ($)
Dec. 31, 2012
USD ($)
Oct. 15, 2014
Senior Notes [Member]
Dec. 31, 2013
Senior Notes [Member]
USD ($)
Dec. 31, 2012
Senior Notes [Member]
USD ($)
Oct. 04, 2010
Senior Notes [Member]
USD ($)
Dec. 31, 2013
Revolving Credit Facility [Member]
USD ($)
Dec. 31, 2012
Revolving Credit Facility [Member]
USD ($)
Nov. 02, 2007
Revolving Credit Facility [Member]
USD ($)
Dec. 31, 2013
Revolving Credit Facility [Member]
Minimum [Member]
USD ($)
Dec. 31, 2013
Revolving Credit Facility [Member]
Federal Funds Rate [Member]
Dec. 31, 2013
Revolving Credit Facility [Member]
Federal Funds Rate [Member]
Maximum [Member]
Dec. 31, 2013
Revolving Credit Facility [Member]
Federal Funds Rate [Member]
Minimum [Member]
Dec. 31, 2013
Revolving Credit Facility [Member]
L I B O R Rate [Member]
Maximum [Member]
Dec. 31, 2013
Revolving Credit Facility [Member]
L I B O R Rate [Member]
Minimum [Member]
Dec. 31, 2013
Line of Credit [Member]
USD ($)
Dec. 31, 2013
Line of Credit [Member]
SEK
Dec. 31, 2012
Line of Credit [Member]
USD ($)
Aug. 29, 2012
Term Loan One [Member]
CNY
Dec. 31, 2013
Term Loan Two [Member]
USD ($)
Aug. 29, 2013
Term Loan Two [Member]
CNY
Dec. 31, 2012
Term Loan Two [Member]
USD ($)
Dec. 31, 2013
Term Loan Two [Member]
People's Bank of China One-Year Lending Rate [Member]
Feb. 28, 2013
Bolton Conductive Systems L L C [Member]
Revolving Credit Facility [Member]
Oct. 13, 2009
Bolton Conductive Systems L L C [Member]
Revolving Credit Facility [Member]
USD ($)
Dec. 31, 2013
PST Eletronicaltda [Member]
USD ($)
Dec. 31, 2013
PST Eletronicaltda [Member]
Term Loan [Member]
USD ($)
Mar. 19, 2013
PST Eletronicaltda [Member]
Term Loan [Member]
BRL
Debt Instrument [Line Items]                                                        
Debt, description of variable rate basis             Interest is payable quarterly at either (i) the higher of the prime rate or the Federal Funds rate plus 0.50%, plus a margin of 0.00% to 0.25% or (ii) LIBOR plus a margin of 1.00% to 1.75%, depending upon the Company's undrawn availability, as defined.                                          
Debt interest rate                                                     5.50%  
Debt instrument, maturity date             Dec. 01, 2016                                 Feb. 01, 2013     Feb. 15, 2016  
Debt instrument, unamortized discount, percentage       2.50%   2.50%                                            
Credit facility, commitment fee percentage             0.375%                                          
Line of credit facility, maximum borrowing capacity                 $ 100,000,000             $ 3,107,000 20,000,000 $ 3,075,000             $ 3,000,000      
Credit facility, borrowing capacity             71,072,000 74,060,000                                        
Basis spread on variable rate                     0.50% 0.25% 0.00% 1.75% 1.00%                          
Interest rate, percent of variable rate                                             125.00%          
Face value of senior secured notes       175,000,000 175,000,000                                              
Debt early redemption premium     104.75%                                                  
Line of credit facility covenant limits                   20,000,000                                    
Credit facility, capacity restrictions of investment activities             15,000,000                                          
Unamortized discount       2,732,000 3,296,000                                              
Debt, face amount           175,000,000                         9,000,000   9,000,000             25,000,000
Debt outstanding                                       1,487,000   1,445,000         10,697,000  
Credit facilities               1,160,000                                        
Total long-term debt, net 185,045,000 181,311,000                                                 11,909,000  
Less: current portion 12,187,000 18,925,000                                                    
2014 12,187,000                                                      
2015 6,691,000                                                 6,616,000    
2016 177,122,000                                                   2,122,000  
2017 1,057,000                                                 1,057,000    
2018 1,057,000                                                      
Thereafter $ 1,057,000                                                   $ 1,057,000