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Derivatives - Narrative (Details) € in Thousands, ₩ in Thousands, ¥ in Thousands, ¥ in Thousands, £ in Thousands, kr in Thousands, kr in Thousands, SFr in Thousands, R$ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands | 6 Months Ended |  |  |
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Jun. 30, 2018 USD ($) derivative_instrument | Jun. 30, 2018 CHF (SFr) derivative_instrument | Jun. 30, 2018 DKK (kr) derivative_instrument | Jun. 30, 2018 MXN ($) derivative_instrument | Jun. 30, 2018 CNY (¥) derivative_instrument | Jun. 30, 2018 KRW (₩) derivative_instrument | Jun. 30, 2018 GBP (£) derivative_instrument | Jun. 30, 2018 CAD ($) derivative_instrument | Jun. 30, 2018 JPY (¥) derivative_instrument | Jun. 30, 2018 SGD ($) derivative_instrument | Jun. 30, 2018 EUR (€) derivative_instrument | Jun. 30, 2018 HKD ($) derivative_instrument | Jun. 30, 2018 SEK (kr) derivative_instrument | Jun. 30, 2018 AUD ($) derivative_instrument | Jun. 30, 2018 BRL (R$) derivative_instrument | Dec. 31, 2017 USD ($) | Aug. 05, 2016 USD ($)
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred taxes used to offset fair value of interest rate swap |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (1,500) |
Maturity of derivative contract (up to) | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue and cost of sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount expected to be reclassified from accumulated other comprehensive income to earnings in next twelve months, gross | $ 464 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount expected to be reclassified from accumulated other comprehensive income to earnings in next twelve months, net of tax | 345 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount expected to be reclassified from accumulated other comprehensive income to earnings in next twelve months, gross | 2,200 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount expected to be reclassified from accumulated other comprehensive income to earnings in next twelve months, net of tax | 1,600 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swap |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 175,000
Fixed rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.12%
Deferred taxes used to offset fair value of interest rate swap | $ 2,100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency forward contracts | Designated as hedging instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average number of contracts entered into per month | derivative_instrument | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |  |
Foreign currency forward contracts | Not designated as hedging instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of derivative |  | SFr 255 | kr 2,885 | $ 18,700 | ¥ 95,228 | ₩ 2,700,000 | £ 1,584 | $ 3,098 | ¥ 260,000 | $ 6,900 | € 25,861 | $ 11,000 | kr 10,536 | $ 8,400 | R$ 8,500 |  |
Average number of contracts entered into per month | derivative_instrument | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |  |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Tax + References No definition available. + Details
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- Definition Cash Flow Hedge Gain (Loss) To Be Reclassified Within Twelve Months, Gross + References No definition available. + Details
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- Definition Derivative, Average Number of Contracts Entered Into Per Month + References No definition available. + Details
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- Definition The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=112277219&loc=d3e80748-113994 + Details
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- Definition Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Details
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