v3.20.4

Derivative financial instruments, Breakdown of maturities of notional and fair value amounts (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Breakdown of Maturities of Notional and Fair Value Amounts [Abstract] |  |  |
Loss on cash flow hedges | $ 58,381 | $ 55,765 | $ 67,519
Cap [Member] |  |  |
Breakdown of Maturities of Notional and Fair Value Amounts [Abstract] |  |  |
Notionals | 907,752 | 593,715 |
Fair value | $ 898 | $ 1,619 |
Cap [Member] | 2020 [Member] |  |  |
Breakdown of Maturities of Notional and Fair Value Amounts [Abstract] |  |  |
Notionals | 61,364 | 43,266 |
Fair value | $ 59 | $ 118 |
Cap [Member] | Between 1 and 2 Years [Member] |  |  |
Breakdown of Maturities of Notional and Fair Value Amounts [Abstract] |  |  |
Notionals | 296,828 | 45,955 |
Fair value | $ 255 | $ 128 |
Cap [Member] | Between 2 and 3 Years [Member] |  |  |
Breakdown of Maturities of Notional and Fair Value Amounts [Abstract] |  |  |
Notionals | 257,548 | 49,259 |
Fair value | $ 305 | $ 140 |
Cap [Member] | Subsequent Years [Member] |  |  |
Breakdown of Maturities of Notional and Fair Value Amounts [Abstract] |  |  |
Notionals | 292,011 | 455,235 |
Fair value | $ 280 | $ 1,234 |
Swap [Member] |  |  |
Breakdown of Maturities of Notional and Fair Value Amounts [Abstract] |  |  |
Notionals | 1,499,466 | 2,180,085 |
Fair value | $ (302,302) | $ (298,744) |
Swap [Member] | 2020 [Member] |  |  |
Breakdown of Maturities of Notional and Fair Value Amounts [Abstract] |  |  |
Notionals | 120,874 | 117,574 |
Fair value | $ (21,042) | $ (18,721) |
Swap [Member] | Between 1 and 2 Years [Member] |  |  |
Breakdown of Maturities of Notional and Fair Value Amounts [Abstract] |  |  |
Notionals | 249,785 | 124,908 |
Fair value | $ (48,276) | $ (19,787) |
Swap [Member] | Between 2 and 3 Years [Member] |  |  |
Breakdown of Maturities of Notional and Fair Value Amounts [Abstract] |  |  |
Notionals | 276,111 | 240,570 |
Fair value | $ (55,220) | $ (21,802) |
Swap [Member] | Subsequent Years [Member] |  |  |
Breakdown of Maturities of Notional and Fair Value Amounts [Abstract] |  |  |
Notionals | 852,696 | 1,697,033 |
Fair value | $ (177,764) | $ (238,434) |
Cash Flow Hedge [Member] |  |  |
Breakdown of Maturities of Notional and Fair Value Amounts [Abstract] |  |  |
Fair value of financial liabilities | $ 328,184 | 298,744 |
Interest Rate Derivatives [Member] | Euros [Member] |  |  |
Breakdown of Maturities of Notional and Fair Value Amounts [Abstract] |  |  |
Percentage of notional amount of project debt hedged | 100.00% |  |
Maturity date | 2030 |  |
Percent of notional amount of debt hedged in next 12 months | 100.00% |  |
Percentage of notional amount of debt hedged in year two | 75.00% |  |
Interest Rate Derivatives [Member] | Euros [Member] | Bottom of Range [Member] |  |  |
Breakdown of Maturities of Notional and Fair Value Amounts [Abstract] |  |  |
Average guaranteed interest rates | 0.00% |  |
Interest Rate Derivatives [Member] | Euros [Member] | Top of Range [Member] |  |  |
Breakdown of Maturities of Notional and Fair Value Amounts [Abstract] |  |  |
Average guaranteed interest rates | 4.87% |  |
Interest Rate Derivatives [Member] | U.S. Dollars [Member] |  |  |
Breakdown of Maturities of Notional and Fair Value Amounts [Abstract] |  |  |
Maturity date | 2034 |  |
Interest Rate Derivatives [Member] | U.S. Dollars [Member] | Bottom of Range [Member] |  |  |
Breakdown of Maturities of Notional and Fair Value Amounts [Abstract] |  |  |
Percentage of notional amount of project debt hedged | 72.00% |  |
Average guaranteed interest rates | 1.98% |  |
Interest Rate Derivatives [Member] | U.S. Dollars [Member] | Top of Range [Member] |  |  |
Breakdown of Maturities of Notional and Fair Value Amounts [Abstract] |  |  |
Percentage of notional amount of project debt hedged | 100.00% |  |
Average guaranteed interest rates | 5.27% |  |
Interest Rate Derivatives [Member] | Cash Flow Hedge [Member] |  |  |
Breakdown of Maturities of Notional and Fair Value Amounts [Abstract] |  |  |
Loss on cash flow hedges | $ (58,381) | (55,765) | $ (67,519)
After-tax result accumulated in equity | 96,641 | 73,797 |
Fair value of financial liabilities | 302,302 | 298,744 |
Notes Conversion Option [Member] | Cash Flow Hedge [Member] |  |  |
Breakdown of Maturities of Notional and Fair Value Amounts [Abstract] |  |  |
Fair value of financial liabilities | $ 25,882 | $ 0 |

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