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Borrowings and debt (Details 1) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Borrowings and debts |  |
Total short-term borrowings | $ 331,585 | $ 1,573,663
Total short-term debt | 49,350 | 22,000
Total short-term borrowings and debt | 380,935 | 1,595,663
US Dollar [Member] |  |
Borrowings and debts |  |
Total short-term borrowings and debt | 299,957 | 1,476,000
Mexican Peso [Member] |  |
Borrowings and debts |  |
Total short-term borrowings and debt | 80,978 | 119,663
Fixed interest rate [member] |  |
Borrowings and debts |  |
Total short-term borrowings | 55,000 | 607,500
Total short-term debt | $ 0 | $ 22,000
Fixed interest rate [member] | Mexican Peso [Member] | Short-term borrowings [member] |  |
Borrowings and debts |  |
Borrowing and debt | 0.00% | 8.08%
Floating interest rate [member] |  |
Borrowings and debts |  |
Total short-term borrowings | $ 276,585 | $ 966,163
Total short-term debt | $ 49,350 | $ 0
Minimum | Fixed interest rate [member] | Short Term Borrowings And Debt [Member] | US Dollar [Member] |  |
Borrowings and debts |  |
Borrowing and debt | 0.45% | 2.07%
Minimum | Floating interest rate [member] | Short Term Borrowings And Debt [Member] | US Dollar [Member] |  |
Borrowings and debts |  |
Borrowing and debt | 0.47% | 2.09%
Minimum | Floating interest rate [member] | Short Term Borrowings And Debt [Member] | Mexican Peso [Member] |  |
Borrowings and debts |  |
Borrowing and debt | 4.97% | 7.71%
Maximum | Fixed interest rate [member] | Short Term Borrowings And Debt [Member] | US Dollar [Member] |  |
Borrowings and debts |  |
Borrowing and debt | 1.40% | 2.52%
Maximum | Floating interest rate [member] | Short Term Borrowings And Debt [Member] | US Dollar [Member] |  |
Borrowings and debts |  |
Borrowing and debt | 1.65% | 2.35%
Maximum | Floating interest rate [member] | Short Term Borrowings And Debt [Member] | Mexican Peso [Member] |  |
Borrowings and debts |  |
Borrowing and debt | 5.05% | 8.31%

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