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Debt (Narrative) (Details) SEK in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2016 SEK | Jun. 30, 2016 SEK | Jun. 30, 2016 USD ($) | Dec. 31, 2015 USD ($) | Sep. 12, 2014 USD ($) | Oct. 04, 2010 | Nov. 02, 2007 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |
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% |  |  |  |
Senior Notes [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt interest rate |  |  |  |  |  | 9.50% |
Revolving Credit Facility [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt interest rate | 1.94% | 1.94% | 1.94% |  |  |  |
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 |  |  |  |  |
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 |  |  |
Credit Facility [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Credit Facility covenant compliance |  | The Company was in compliance with all credit facility covenants at June 30, 2016 and December 31, 2015 |  |  |  |  |
PST Debt [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Notes covenant compliance |  | The Company was in compliance with all debt covenants at June 30, 2016 and December 31, 2015. |  |  |  |  |
PST Eletronicaltda [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt, weighted average interest rate | 10.70% | 10.70% | 10.70% |  |  |  |
Short-term debt, weighted average interest rate | 14.10% | 14.10% | 14.10% |  |  |  |
PST Eletronicaltda [Member] | Term Loan [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
July 2016 through June 2017 |  |  | $ 13,610 |  |  |  |
July 2017 to December 2017 |  |  | 1,611 |  |  |  |
2018 |  |  | 3,052 |  |  |  |
2019 |  |  | 1,480 |  |  |  |
2020 |  |  | 402 |  |  |  |
2021 |  |  | 369 |  |  |  |
Electronics [Member] | Line of Credit [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity | SEK 20,000 | SEK 20,000 | $ 2,364 | $ 2,369 |  |  |

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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 -Glossary Line-of-Credit Arrangement -URI http://asc.fasb.org/extlink&oid=6517033 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 210.5-02.20) -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, 20 -Article 5 + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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