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Financial instruments (Details 9) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 USD ($)
Series H bonds [Member] |
Financial instruments [Line Items] |
Contract amount | $ 119,938
Currency | UF
Derivative contracts, Maturity | Jan. 04, 2023
Series O bonds [Member] |
Financial instruments [Line Items] |
Contract amount | $ 58,748
Currency | UF
Derivative contracts, Maturity | Feb. 01, 2022
Series P bonds [Member] |
Financial instruments [Line Items] |
Contract amount | $ 134,228
Currency | UF
Derivative contracts, Maturity | Jan. 15, 2028
Series Q bonds [Member] |
Financial instruments [Line Items] |
Contract amount | $ 106,933
Currency | UF
Derivative contracts, Maturity | Jun. 01, 2030

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