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Debt (Details Textual) In Thousands, unless otherwise specified | 1 Months Ended | 12 Months Ended |  |  |  | 1 Months Ended | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |
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Sep. 30, 2010 USD ($) | Dec. 31, 2012 USD ($) | Dec. 31, 2011 USD ($) | Dec. 31, 2010 USD ($) | Dec. 31, 2012 SEK | Nov. 02, 2007 USD ($) | Dec. 31, 2012 Minimum [Member] USD ($) | Oct. 31, 2010 Senior Notes [Member] | Sep. 30, 2010 Senior Notes [Member] USD ($) | Dec. 31, 2012 Senior Notes [Member] USD ($) | Dec. 31, 2011 Senior Notes [Member] USD ($) | Oct. 04, 2010 Senior Notes [Member] USD ($) | Dec. 31, 2012 Line Of Credit [Member] USD ($) | Dec. 31, 2011 Line Of Credit [Member] USD ($) | Dec. 31, 2012 Line Of Credit [Member] Federal Funds Rate [Member] | Dec. 31, 2012 Line Of Credit [Member] Margin Rate [Member] | Dec. 31, 2012 Line Of Credit [Member] L I B O R Rate [Member] | Dec. 31, 2011 Term Loan One [Member] CNY | Dec. 31, 2012 Term Loan Two [Member] USD ($) | Dec. 31, 2012 Term Loan Two [Member] CNY | Dec. 31, 2012 Bolton Conductive Systems L L C [Member] | Dec. 31, 2012 Bolton Conductive Systems L L C [Member] Revolving Credit Facility [Member] USD ($) | Oct. 13, 2009 Bolton Conductive Systems L L C [Member] Revolving Credit Facility [Member] USD ($) | Dec. 31, 2012 Pst Eletronica Ltda [Member] USD ($) | Dec. 31, 2012 Pst Eletronica Ltda [Member] Revolving Credit Facility [Member] USD ($) | Dec. 31, 2012 Pst Eletronica Ltda [Member] Term Loan [Member] | Dec. 31, 2012 Pst Eletronica Ltda [Member] Term Loan [Member] Maximum [Member] USD ($) | Dec. 31, 2012 Pst Eletronica Ltda [Member] Term Loan [Member] Minimum [Member] USD ($)
Write off of Deferred Debt Issuance Cost |  |  |  |  |  |  |  |  | $ 1,022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Covenant Compliance |  | As of December 31, 2012 and 2011, PST was in compliance with all loan covenants. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, 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. |  | Federal Funds rate plus 0.50% |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Frequency of Periodic Payment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | monthly |  |  |  | monthly or annually |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  |  |  | 9.50% |  |  |  |  |  |  | 125.00% | 125.00% |  |  |  |  |  |  |  |
Debt Instrument, Maturity Date |  |  |  |  |  |  |  |  |  |  |  |  | Dec. 01, 2016 |  |  |  |  | Aug. 29, 2012 |  |  |  |  |  |  |  |  |  |
Debt Instrument, Payment Terms |  |  |  |  |  |  |  | Interest payments are payable on April 15 and October 15 of each year. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Unamortized Discount, Percentage |  |  |  |  |  |  |  |  |  |  |  | 2.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Commitment Fee Percentage |  | 0.375% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | 3,075 |  |  | 20,000 | 100,000 |  |  |  |  |  |  | 74,060 | 29,540 |  |  |  |  |  |  |  |  | 3,000 |  | 0 |  |  |
Line of Credit, Current |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |
Secured Long-term Debt, Noncurrent |  |  |  |  |  |  |  |  |  | 175,000 | 175,000 | 175,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Basis Spread On Variable Maximum Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.25% | 1.75% |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Basis Spread On Variable Minimum Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.00% | 1.00% |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Redeemable Percentage |  |  |  |  |  |  |  |  |  |  |  | 104.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line Of Credit Facility Covenant Limits |  | 15,000 |  |  |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of Debt Discount (Premium) |  |  |  |  |  |  |  |  |  | 3,296 | 3,807 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity Period Of Long Term Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2014 |  |  |  |
Debt Instrument, Issuer |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Company's wholly-owned subsidiary located in Suzhou, China |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Sep. 02, 2011 | Aug. 29, 2012 | Aug. 29, 2012 |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9,000 |  | 9,000 |  |  |  |  |  |  |  |
Long-term Debt, Gross |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,445 |  |  |  |  |  |  |  |  |
Line of Credit Facility, Initiation Date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Oct. 13, 2009 |  |  |  |  |  |  |
Line of Credit Facility, Expiration Date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Sep. 30, 2013 |  |  |  |  |  |  |
Line of Credit Facility, Interest Rate Description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Interest is payable monthly at the prime referenced rate plus a 2.0% margin. |  |  |  |  |  |  |
Total long-term debt, net |  | 181,311 | 183,711 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,295 |  |  |  |
Less: current portion |  | 18,925 | 44,246 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,234 |  |  |  |
Debt Instrument Tender Offer Received Description |  |  |  |  |  |  |  |  | For senior notes tendered before the consent payment deadline, the note holders received $1,002.50 for each $1,000.00 of principal amount of notes tendered. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tendered Debt Instrument Amount |  |  |  |  |  |  |  |  | 109,733 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional Tendered Debt Instrument Amount |  |  |  |  |  |  |  |  | 154 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Post Tender Offer Receivable Description |  |  |  |  |  |  |  |  | Holders tendering senior notes after the consent payment deadline were eligible to receive only the tender offer consideration of $1,000.00 per $1,000.00 principal amount of senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on early extinguishment of debt | 1,346 | 0 | 0 | (1,346) |  |  |  |  | 1,346 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Premium Paid On Extinguishment Of Debt |  |  |  |  |  |  |  |  | 324 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Annual Principal Payment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,217 | $ 1,211

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- Definition Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 21 -Paragraph 16 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 + Details
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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 26 -Paragraph 20, 21 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12317-112629 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12355-112629 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. + References No definition available. + Details
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- Definition Date the credit facility terminates, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Date the credit facility first became available, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Line-of-Credit Arrangement -URI http://asc.fasb.org/extlink&oid=6517033 + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19 -Article 5 + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + Details
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- Definition Carrying amount of collateralized debt obligations with maturities initially due after one year or beyond the operating cycle, if longer, excluding the current portion. Obligations include, but not limited to, mortgage loans, chattel loans, and other borrowings secured by assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + Details
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- Definition Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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