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Financial Instruments and Fair Value Measurement (Details) - Fair Value, Inputs, Level 2 - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Receivables from hedges/derivatives | $ 4 | $ 195
Prepaid expenses and other current assets | 4 | 195
Liabilities from derivatives | 13,377 | 23,127
Other current liabilities | 1,322 | 296
Other liabilities (non-current) | 12,055 | 22,831
Term loan |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of loans | 647,923 | 667,980
Local bank loans |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of loans | $ 68,443 | $ 75,640

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