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Derivatives - Narrative (Details) € in Thousands, ₩ in Thousands, ¥ in Thousands, ¥ in Thousands, £ in Thousands, SGD in Thousands, SFr in Thousands, SEK in Thousands, MXN in Thousands, HKD in Thousands, DKK in Thousands, CAD in Thousands, BRL in Thousands, AUD in Thousands |  | 12 Months Ended |  |  |
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Dec. 19, 2012 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2017 AUD | Dec. 31, 2017 CNY (¥) | Dec. 31, 2017 DKK | Dec. 31, 2017 MXN | Dec. 31, 2017 CHF (SFr) | Dec. 31, 2017 KRW (₩) | Dec. 31, 2017 GBP (£) | Dec. 31, 2017 CAD | Dec. 31, 2017 JPY (¥) | Dec. 31, 2017 SGD | Dec. 31, 2017 SEK | Dec. 31, 2017 EUR (€) | Dec. 31, 2017 HKD | Dec. 31, 2017 BRL | Dec. 31, 2016 USD ($) | Aug. 05, 2016 USD ($)
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred taxes used to offset fair value of interest rate swap |  | $ (2,200,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (1,900,000) |
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 |  | $ 44,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount expected to be reclassified from accumulated other comprehensive income to earnings in next twelve months, net of tax |  | 33,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount expected to be reclassified from accumulated other comprehensive income to earnings in next twelve months, gross |  | 1,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount expected to be reclassified from accumulated other comprehensive income to earnings in next twelve months, net of tax |  | 840,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swap |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of derivative | $ 150,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 42,500,000
Fixed rate | 0.9825% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.12%
Quarterly reduction of notional amount | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred taxes used to offset fair value of interest rate swap |  | $ (1,500,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swap | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 175,000,000
Foreign currency forward contracts | Designated as hedging instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average number of contracts entered into per month |  | 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 |  |  | AUD 5,600 | ¥ 22,990 | DKK 1,881 | MXN 17,540 | SFr 242 | ₩ 1,800,000 | £ 1,868 | CAD 2,076 | ¥ 178,500 | SGD 5,023 | SEK 4,775 | € 23,333 | HKD 11,000 | BRL 8,500 |  |
Average number of contracts entered into per month |  | 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 Derivative, Quarterly Reduction of Notional Amount + 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35736893&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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