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Bank call loans - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Bank Call Loans [Abstract] |  |  |
Interest expense on bank call loans | $ 1.8 | $ 0.7 | $ 0.8

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- Definition Bank Call Loans [Abstract] + References No definition available. + Details
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- Definition Interest expense on bank call loans. + References No definition available. + Details
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