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Fair Value of Financial Instruments Additional Information (Details) - Forward contracts - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Derivative, notional amount | $ 707,600 |  | $ 626,500
Other accounts receivable |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Fair value foreign currency forward contracts, asset | 388 |  | $ 431
Other expenses, net |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Recognized (losses) gains of foreign currency forward contracts | (10,415) | $ 4,819 |
Other, net |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Change in the fair value of foreign currency forward contracts | 10,400 | (4,800) |
Cash settlements | $ (10,400) |  |
Cash receipts |  | $ 100 |

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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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