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III. Financial Risk Management (Details Textual) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |  |  |
Debt to equity ratio |  | 0.05 | 0.06 |
Reserve of exchange differences on translation |  | $ 2,300 | $ 600 |
Total borrowings |  | 619,007 | 822,152 |
Gain (loss) on interest rate risk if market interest rates were higher |  | $ (7,100) | $ (7,700) |
Concentration Risk, percentage |  | 88.00% | 96.00% |
Current trade receivables |  | $ 968,148 | $ 1,348,160 | $ 1,737,366
Liquid financial assets, percentage |  | 12.00% | 12.00% |
Financial liabilities, fair value as a percentage of carrying value |  | 100.00% | 100.00% |
Reserve of cash flow hedges, continuing hedges |  | $ (4,800) | $ 2,600 |
UNITED STATES |  |  |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |  |  |
Liquid financial assets, percentage denominated by a specific currency |  | 95.00% | 95.00% |
Allowance for doubtful accounts - trade receivables [member] |  |  |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |  |  |
Current trade receivables |  | $ 53,700 | $ 48,800 |
Past due [member] |  |  |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |  |  |
Current trade receivables |  | 195,900 | 242,700 |
Guarantees under credit insurance [member] |  |  |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |  |  |
Current trade receivables |  | 134,900 | 178,700 |
Letter of credit and other bank guarantees [member] |  |  |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |  |  |
Current trade receivables |  | 47,800 | 55,200 |
Other guarantees [member] |  |  |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |  |  |
Current trade receivables |  | 8,800 | 600 |
Financial guarantee contracts [member] | Past due [member] |  |  |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |  |  |
Current trade receivables |  | 20,700 | 28,700 |
Fixed interest rate [member] |  |  |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |  |  |
Total borrowings | [1] | 237,320 | $ 768,002 |
Current borrowings |  | $ 197,000 |  |
Concentration Risk, percentage | [1] | 38.00% | 93.00% |
One percent change, Argentine Peso / U.S. dollar foreign exchange risk [member] |  |  |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |  |  |
Reserve of exchange differences on translation |  | $ 400 | $ 1,000 |
One percent change, Euro / U.S. dollar foreign exchange risk [member] |  |  |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |  |  |
Foreign exchange risk, currency exposure |  | 2,900 | 1,000 |
One percent change, Saudi Arabian Riyal / U.S. dollar foreign exchange risk [member] |  |  |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |  |  |
Foreign exchange risk, currency exposure |  | 5,100 | 4,600 |
One percent change, Saudi Arabian Riyal / U.S. dollar foreign exchange risk [member] | Foreign exchange derivatives contracts [member] |  |  |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |  |  |
Foreign exchange risk, currency exposure |  | $ 1,000 | $ 4,900 |
[1] | Out of the $237 million fixed rate borrowings, $197 million are short-term.

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