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Financial Instrument - Risk Management and Fair Value - Summary of Carrying Amount and Fair Values of Financial Assets and Financial Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure of detailed information about financial instruments [line items] |  |
Long-term investments | $ 119,617 | $ 134,347
Loans and borrowings | 1,163,900 | 1,060,765
Financial Assets at Fair Value, Class [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Long-term investments | 120,938 | 155,051
Financial Liabilities at Fair Value, Class [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans and borrowings | $ 1,327,282 | $ 1,068,961

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