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Debt (Narrative) (Details) SEK in Thousands, $ in Thousands |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended | 21 Months Ended |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 15, 2014 USD ($) | Sep. 02, 2014 USD ($) | Sep. 30, 2015 USD ($) | Dec. 31, 2014 USD ($) | Sep. 30, 2014 USD ($) | Dec. 31, 2014 USD ($) | Sep. 30, 2015 SEK | Sep. 30, 2014 USD ($) | Dec. 31, 2014 SEK | Sep. 30, 2015 SEK | Sep. 30, 2015 USD ($) | Dec. 31, 2014 USD ($) | Oct. 17, 2014 CNY (¥) | Sep. 12, 2014 USD ($) | Sep. 01, 2014 USD ($) | Feb. 25, 2014 CNY (¥) | Oct. 04, 2010 USD ($) | Nov. 02, 2007 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit Facility covenat compliance |  |  |  |  |  |  | The Company was in compliance with all credit facility covenants at September 30, 2015 and December 31, 2014 |  | The Company was in compliance with all credit facility covenants at September 30, 2015 and December 31, 2014 |  |  |  |  |  |  |  |  |
Notes covenant compliance |  |  |  |  |  |  |  |  |  | The Company was in compliance with all note covenants at September 30, 2015 and December 31, 2014. |  |  |  |  |  |  |  |
Borrowings outstanding |  |  |  |  |  |  |  |  |  |  | $ 100,000 | $ 100,000 |  |  |  |  |  |
Maximum leverage ratio |  |  |  |  |  |  | 300.00% |  |  | 300.00% | 300.00% |  |  |  |  |  |  |
Minimum interest coverage ratio |  |  |  |  |  |  | 350.00% |  |  | 350.00% | 350.00% |  |  |  |  |  |  |
Total long-term debt, net |  |  |  |  |  |  |  |  |  |  | $ 4,982 | 10,651 |  |  |  |  |  |
Less: current portion |  |  |  |  |  |  |  |  |  |  | 17,913 | 19,655 |  |  |  |  |  |
Loss on early extinguishment of debt |  |  |  |  | $ (920) |  |  | $ (920) |  |  |  |  |  |  |  |  |  |
Senior Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Write off of deferred financing costs |  |  |  | $ 535 | 295 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9.50% |
Debt instrument, maturity date |  |  |  |  |  |  | Oct. 15, 2017 |  |  |  |  |  |  |  |  |  |  |
Face value of senior secured notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 175,000 |  | $ 175,000 |
Note redeemable start date |  |  |  |  |  |  | Oct. 15, 2014 |  |  |  |  |  |  |  |  |  |  |
Percentage of outstanding debt redeemed |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt early redemption percentage | 104.75% | 103.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt early redemption premium | 104.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of debt discount (premium) |  |  |  | 2,019 |  |  |  |  |  |  |  |  |  |  |  |  |  |
De-designation date unrecognized gain on interest rate swap |  |  |  | 348 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption of notes | $ 157,500 | $ 17,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on early extinguishment of debt |  |  |  | 9,687 | 820 | $ (10,507) |  |  |  |  |  |  |  |  |  |  |  |
Premium paid on extinguishment of debt |  |  |  | $ 7,481 | $ 525 |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capitalized deferred financing costs |  |  |  |  |  |  |  |  |  |  | $ 1,499 |  |  |  |  |  |  |
Debt interest rate |  |  |  |  |  |  | 2.12% |  |  | 2.12% | 2.12% |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 300,000 |  |  |  | $ 100,000
Increase in maximum borrowing capacity of credit facility |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 80,000 |  |  |  |
Borrowings outstanding |  |  |  |  |  |  |  |  |  |  | $ 100,000 | 100,000 |  |  |  |  |  |
Line of credit expiration date |  |  |  |  |  |  | Sep. 12, 2019 |  |  |  |  |  |  |  |  |  |  |
Loss on early extinguishment of debt |  |  | $ 100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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% |  |  |  |  |  |  |  |  |  |  |
Term Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit, current |  |  |  |  |  |  |  |  |  |  | $ 0 | 0 |  |  |  |  |  |
Term Loan One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, face amount | ¥ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 9,000,000 |  |
Term Loan One [Member] | People's Bank of China One-Year Lending Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate multiplier |  |  |  |  |  |  | 120.00% |  |  |  |  |  |  |  |  |  |  |
Term Loan Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, face amount | ¥ |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 9,000,000 |  |  |  |  |
Debt outstanding |  |  |  |  |  |  |  |  |  |  |  | 1,450 |  |  |  |  |  |
PST Eletronicaltda [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, weighted average interest rate |  |  |  |  |  |  | 7.40% |  |  | 7.40% | 7.40% |  |  |  |  |  |  |
Short-term debt, weighted average interest rate |  |  |  |  |  |  | 16.80% |  |  | 16.80% | 16.80% |  |  |  |  |  |  |
PST Eletronicaltda [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
October 2015 through September 2016 |  |  |  |  |  |  |  |  |  |  | $ 17,460 |  |  |  |  |  |  |
Long term debt maturities of princpical in remaining portion of year two |  |  |  |  |  |  |  |  |  |  | 600 |  |  |  |  |  |  |
2017 |  |  |  |  |  |  |  |  |  |  | 1,841 |  |  |  |  |  |  |
2018 |  |  |  |  |  |  |  |  |  |  | 969 |  |  |  |  |  |  |
2019 |  |  |  |  |  |  |  |  |  |  | 948 |  |  |  |  |  |  |
2021 |  |  |  |  |  |  |  |  |  |  | 299 |  |  |  |  |  |  |
2020 |  |  |  |  |  |  |  |  |  |  | 325 |  |  |  |  |  |  |
Electronics [Member] | Line of Credit [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  | SEK 20,000 |  | SEK 20,000 | SEK 20,000 | $ 2,390 | $ 2,562 |  |  |  |  |  |

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