Variable interest entities (Maximum exposure to loss in VIEs) (Details) - USD ($) $ in Thousands |
Jun. 30, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Variable Interest Entities [Abstract] | ||
| Carrying value of debt and equity investments and maximum exposure to loss | $ 129,512 | $ 125,955 |
| X | ||||||||||
- Definition Variable Interest Entities [Abstract] No definition available.
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| X | ||||||||||
- Definition Variable Interest Entity, Entity Maximum Loss Exposure, Equity Investment and Cost Method Investment Amount No definition available.
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