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Income Tax - Accrued Interest and Penalties on Uncertain Tax Position (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
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Disclosure Of Change In Uncertain Tax Positions [Abstract] |  |  |
Accrued interest on uncertain tax position | $ 597 | $ 713 | $ 867
Accrued penalties on uncertain tax position | 339 | 384 | 461
Total accrued interest and penalties on uncertain tax position | $ 936 | $ 1,097 | $ 1,328

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- Definition Accrued penalties on uncertain tax position. + References No definition available. + Details
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