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Financial Instruments and Fair Value Measurements (Narrative) (Details) lb in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2015 USD ($) | Jun. 30, 2014 USD ($) | Jun. 30, 2015 USD ($) | Jun. 30, 2014 USD ($) | Dec. 31, 2014 USD ($) lb | Sep. 30, 2014 USD ($) | Sep. 01, 2014 USD ($) | Oct. 04, 2010 USD ($)
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |  |  |
Amount from cash flow hedge derivatives to be reclassified |  | $ 208 |  | $ 208 |  |  |  |  |  |
Goodwill impairment charge (benefit) |  |  | $ 29,300 |  | $ 29,300 |  |  |  |  |
Euro-Denominated Foreign Currency Forward Contracts [Member] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |  |  |
Gain (loss) on derivative instruments held for trading purposes, net |  | (72) | 86 | $ 316 | 25 |  |  |  |  |
Mexican Peso-Denominated Foreign Currency Forward Contracts [Member] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |  |  |
Gain (loss) on derivative instruments held for trading purposes, net |  |  | 320 |  |  |  |  |  |  |
Copper Commodity [Member] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |  |  |
Gain (loss) on derivative instruments held for trading purposes, net |  |  | 77 |  |  |  |  |  |  |
Interest Rate Swap [Member] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |  |  |
Discription of variable rate basis of derivative |  |  |  | the Company paid a variable interest rate equal to the six-month London Interbank Offered Rate ("LIBOR") plus 7.2% |  |  |  |  |  |
Fixed interest rate |  |  |  |  |  |  |  | 9.50% |  |
Reduction in interest expense as a result of swap |  |  | $ (206) |  | (431) |  |  |  |  |
Senior Notes [Member] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |  |  |
Face value of senior secured notes |  |  |  |  |  |  |  |  | $ 175,000 | $ 175,000
Fixed interest rate |  |  |  |  |  |  |  | 9.50% |  |
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Forward Currency Contracts [Member] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |  |  |
Notional amounts |  | 13,322 |  | $ 13,322 |  | $ 26,266 | [1] |  |  |
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | U.S. Dollar Denominated Foreign Currency Forward Contracts, Swedish Krona Functional Currency [Member] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |  |  |
Notional amounts |  | 5,780 |  | 5,780 |  | 11,718 |  |  |  |
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | U.S. Dollar Denominated Foreign Currency Forward Contracts Euro Functional Currency [Member] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |  |  |
Notional amounts |  | 2,104 |  | 2,104 |  | 4,266 |  |  |  |
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Mexican Peso-Denominated Foreign Currency Forward Contracts [Member] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |  |  |
Notional amounts |  | 5,438 |  | 5,438 |  | 10,282 |  |  |  |
Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] | Interest Rate Swap [Member] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |  |  |
Notional amounts |  |  |  |  |  |  |  | $ 45,000 |  |
Not Designated as Hedging Instrument [Member] | Forward Currency Contracts [Member] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |  |  |
Notional amounts |  | 1,693 |  | 1,693 |  | 3,523 | [1] |  |  |
Not Designated as Hedging Instrument [Member] | Euro-Denominated Foreign Currency Forward Contracts [Member] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |  |  |
Notional amounts |  | $ 1,693 |  | $ 1,693 |  | $ 3,523 |  |  |  |
Not Designated as Hedging Instrument [Member] | Copper Commodity [Member] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |  |  |
Fixed price commodity contracts (in pounds) | lb | [1] |  |  |  |  | 317 |  |  |  |
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap [Member] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |  |  |
Variable interest rate in addition to LIBOR |  |  |  |  |  |  |  | 7.20% |  |
PST [Member] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |  |  |
Goodwill impairment charge (benefit) |  |  |  |  | $ 29,300 |  |  |  |  |
[1] | Notional amounts represent the gross contract / notional amount of the derivatives outstanding. The fixed price commodity contract notional amounts are in pounds.

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