Fair value measurements (Financial assets and liabilities measured at fair value on recurring basis) (Details) - USD ($) $ in Thousands |
Dec. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Assets | ||
| Derivative assets | $ 11,664 | $ 69,105 |
| Liabilities | ||
| Derivative liabilities (Note 11) | 97,066 | 29,321 |
| Recurring | ||
| Assets | ||
| Derivative assets | 11,664 | 69,105 |
| Liabilities | ||
| Derivative liabilities (Note 11) | 97,066 | 29,321 |
| Recurring | Level 1 | ||
| Assets | ||
| Derivative assets | 0 | 0 |
| Liabilities | ||
| Derivative liabilities (Note 11) | 0 | 0 |
| Recurring | Level 2 | ||
| Assets | ||
| Derivative assets | 11,664 | 69,105 |
| Liabilities | ||
| Derivative liabilities (Note 11) | 97,066 | 29,321 |
| Recurring | Level 3 | ||
| Assets | ||
| Derivative assets | 0 | 0 |
| Liabilities | ||
| Derivative liabilities (Note 11) | $ 0 | $ 0 |
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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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