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Derivatives - Foreign Currency Exchange Contracts (Details) - Not Designated as Hedging Instrument | 3 Months Ended |
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Mar. 31, 2018 USD ($) $ / R$ ¥ / $ $ / € | Mar. 31, 2017 USD ($) | Dec. 31, 2017 USD ($) $ / R$ ¥ / $ $ / €
USD/Euro Foreign Exchange Forward, April 3, 2018 | USD |  |  |
Derivative [Line Items] |  |  |
Notional value | $ 12,000,000 |  |
Forward rate | $ / € | 1.2247 |  |
Unrealized gain/(loss) recorded at balance sheet date | $ (77,000) |  |
USD/Chinese Yuan Renminbi Foreign Exchange Forward, April 3, 2018 | Chinese Yuan Renminbi |  |  |
Derivative [Line Items] |  |  |
Notional value | $ 25,000,000 |  |
Forward rate | ¥ / $ | 6.3895 |  |
Unrealized gain/(loss) recorded at balance sheet date | $ (504,000) |  |
USD/Brazilian Real Foreign Exchange Forward, March 29, 2018 | USD |  |  |
Derivative [Line Items] |  |  |
Notional value | $ 2,000,000 |  |
Forward rate | $ / R$ | 3.2755 |  |
Unrealized gain/(loss) recorded at balance sheet date | $ 18,000 |  |
USD/Euro Foreign Exchange Forward, January 5, 2018 | USD |  |  |
Derivative [Line Items] |  |  |
Notional value |  |  | $ 17,000,000
Forward rate | $ / € |  |  | 1.1858
Unrealized gain/(loss) recorded at balance sheet date |  | $ (220,000) |
USD/Chinese Yuan Renminbi Foreign Exchange Forward, January 5, 2018 | Chinese Yuan Renminbi |  |  |
Derivative [Line Items] |  |  |
Notional value |  |  | $ 20,000,000
Forward rate | ¥ / $ |  |  | 6.6481
Unrealized gain/(loss) recorded at balance sheet date |  | (410,000) |
USD/Brazilian Real Foreign Exchange Forward, January 24, 2018 | USD |  |  |
Derivative [Line Items] |  |  |
Notional value |  |  | $ 2,500,000.0
Forward rate | $ / R$ |  |  | 3.2350
Unrealized gain/(loss) recorded at balance sheet date |  | $ 65,000 |

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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 Contractual rate at which a foreign currency can be purchased or sold. + References No definition available. + Details
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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
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