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Identification of whether the entity has been in compliance with any credit facility debt covenants during the period.

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Debt (Narrative) (Details) SEK in Thousands, $ in Thousands	9 Months Ended
Debt (Narrative) (Details) SEK in Thousands, $ in Thousands	Sep. 30, 2017 USD ($)	Sep. 30, 2017 SEK	Sep. 30, 2017 USD ($)	Jan. 30, 2017 USD ($)	Dec. 31, 2016 SEK	Dec. 31, 2016 USD ($)	Aug. 12, 2016 USD ($)	Sep. 12, 2014 USD ($)	Oct. 04, 2010	Nov. 02, 2007 USD ($)
Debt Instrument [Line Items]
Borrowings outstanding			$ 126,000			$ 67,000
Senior Notes [Member]
Debt Instrument [Line Items]
Debt interest rate									9.50%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Capitalized deferred financing costs							$ 339
Line of credit facility, maximum borrowing capacity								$ 300,000		$ 100,000
Increase in maximum borrowing capacity of credit facility								$ 80,000
Borrowings outstanding			$ 126,000			67,000
Line of credit expiration date	Sep. 12, 2019
Maximum leverage ratio		300.00%	300.00%
Minimum interest coverage ratio		350.00%	350.00%
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%
Asset-Based Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity										$ 100,000
Letter of Credit [Member]
Debt Instrument [Line Items]
Outstanding letters of credit			$ 3,367			3,399
Credit Facility [Member]
Debt Instrument [Line Items]
Credit Facility covenant compliance	The Company was in compliance with all Credit Facility covenants at September 30, 2017 and December 31, 2016
Amendment Three [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facilty amendement date	Aug. 12, 2016
Length of the amended extension to the expiration date on debt	2 years
Line of credit expiration date	Sep. 12, 2021
Amendment Four [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Capitalized deferred financing costs				$ 61
PST Debt [Member]
Debt Instrument [Line Items]
Notes covenant compliance	PST was in compliance with all debt covenants at September 30, 2017 and December 31, 2016.
PST Eletronicaltda [Member]
Debt Instrument [Line Items]
Long-term debt, weighted average interest rate		11.70%	11.70%
PST Eletronicaltda [Member] \| Term Loan [Member]
Debt Instrument [Line Items]
October 2017 through September 2018			$ 4,373
October 2018 to December 2018			1,211
2019			2,685
2020			629
2021			$ 577
Long-term debt, weighted average interest rate		11.70%	11.70%
Borrowing Sub-Limit for the Company's Foreign Subsidiaries [Member] \| Amendment Three [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Sub-limit for foreign subsidiary borrowings			$ 80,000
Increase in sub-limit for foreign subsidiary borrowings			30,000
Permitted Loans and Investments in Foreign Subsidiaries [Member] \| Amendment Three [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Increase in permitted loans and investments in foregin subsidiaries.	$ 5,000
Amount of permitted loans and investments in foregin subsidiaries			30,000
Electronics [Member] \| Line of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		SEK 20,000	2,455		SEK 20,000	2,196
Borrowings outstanding			$ 0			$ 0