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Long-term investments - Combined Information for APUC's interest in VIE's (Details) - Variable Interest Entity, Not Primary Beneficiary - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
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Variable Interest Entity [Line Items] |  |
Carrying amount | $ 121,176 | $ 122,752
Development loans receivable | 91,044 | 52,923
Performance guarantees and other commitments on behalf of VIEs | 674,874 | 658,224
APUC's maximum exposure in regard to VIE's | $ 887,094 | $ 833,899

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