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Financial Instruments - Additional Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Derivative [Line Items] |  |
Accrued interest | $ 7,563 | $ 5,754
Unrealized gain on cash flow hedges | $ 10,510 | 18,046
0.125% Convertible Senior Notes |  |
Derivative [Line Items] |  |
Stated interest rate | 0.125% |
Estimated fair value | $ 1,098,342 |
Foreign exchange forward contracts |  |
Derivative [Line Items] |  |
Foreign exchange forward contracts, notional value | 340,843 | 285,700
Foreign exchange forward contracts | Cash Flow Hedging |  |
Derivative [Line Items] |  |
Realized gains (losses) related to the maturity of foreign exchange forward contracts | (2,985) | $ (5,181)
Foreign exchange forward contracts | Cash Flow Hedging | Other Current Liabilities |  |
Derivative [Line Items] |  |
Unrealized gain on cash flow hedges | $ 16,340 |

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