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Financial Instruments and Fair Value Measurements (Narrative) (Details) € in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2020 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2019 USD ($) | Feb. 18, 2020 USD ($) | Dec. 31, 2019 USD ($) | Mar. 31, 2018 EUR (€)
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |
Borrowings outstanding | $ 161,000 |  |  | $ 161,000 |  |  | $ 126,000 |
Interest expense | 1,410 | $ 1,001 |  | 2,440 | $ 2,004 |  |  |
Payment of earn-out consideration paid within operating activities |  |  |  | (233) | 905 |  |  |
Earn-out consideration cash payment within financing activities |  |  |  |  | 3,394 |  |  |
Transfers in or out of Level 3 |  |  |  | 0 |  |  |  |
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 | 1,400 |  |  | 1,400 |  |  | 0 |
Cash Flow Hedging [Member] | Mexican Peso-Denominated Foreign Currency Forward Contracts [Member] |  |  |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |
Notional amounts | 15,402 |  |  | 15,402 |  |  | $ 0 |
Cash Flow Hedging [Member] | Interest Rate Swap [Member] |  |  |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |
Notional amounts |  |  |  |  |  | $ 50,000 |  |
Interest expense | 114 |  |  | 118 |  |  |  |
Cash Flow Hedging [Member] | Interest Rate Swap [Member] | Credit Facility [Member] |  |  |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |
Borrowings outstanding | 161,000 |  |  | 161,000 |  |  |  |
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 | 16,802 |  |  | 16,802 |  |  |  |
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Interest Rate Swap [Member] |  |  |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |
Notional amounts | 50,000 |  |  | 50,000 |  |  |  |
Electronics [Member] |  |  |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |
Interest expense | 313 | 63 |  | 400 | 119 |  |  |
Control Devices [Member] |  |  |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |
Interest expense | 89 | $ 195 |  | 170 | $ 377 |  |  |
Control Devices [Member] | Particulate Matter Fixed Assets [Member] | Tallinn, Estonia Facility [Member] |  |  |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |
Asset impairments | 2,326 |  |  |  |  |  |  |
Control Devices [Member] | Selling, General and Administrative Expenses [Member] | Particulate Matter Fixed Assets [Member] | Tallinn, Estonia Facility [Member] |  |  |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |
Asset impairments | $ 2,326 |  |  | $ 2,326 |  |  |  |
Orlaco [Member] |  |  |  |  |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |  |  |  |
Earn-out consideration |  |  | $ 8,474 |  |  |  |  | € 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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