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Financial Instruments and Fair Value Measurements (Narrative) (Details) € in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2019 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Dec. 31, 2018 USD ($) | Mar. 31, 2018 EUR (€)
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |
Payment of earn-out consideration paid within operating activities |  |  | $ 1,862 | $ 1,918 |  |
Earn-out consideration cash payment within financing activities |  |  | 3,394 |  |  |
Earn-out consideration, operating and financing activities | $ 8,474 |  |  |  |  |
Transfers in or out of Level 3 |  |  | 0 |  |  |
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 |  | $ 10 |  | $ 52 |  |
Cash Flow Hedging [Member] |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |
(Gain) loss from cash flow hedge derivatives to be reclassified |  |  | (121) |  |  |
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 |  |  | 0 |  | $ 0 |
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 |  |  | 0 |  | 0 |
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 |  |  | 1,489 |  | 9,017 |
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 |  |  | 1,489 |  | $ 9,017 |
Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |
Financial assets carried at fair value |  |  | 121 |  |  |
Forward currency asset contracts |  |  | 121 |  |  |
Orlaco [Member] |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |
Earn-out consideration | € |  |  |  |  |  | € 7,500
Payment of earn-out consideration paid within operating activities |  |  | 5,080 |  |  |
Earn-out consideration cash payment within financing activities |  |  | $ 3,394 |  |  |

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