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Income Tax - Accrued Interest and Penalties on Uncertain Tax Position (Detail) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
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Disclosure Of Change In Tax Positions [Abstract] |  |  |
Accrued interest on uncertain tax position | $ 867 | $ 800 | $ 897
Accrued penalties on uncertain tax position | 461 | 486 | 535
Total accrued interest and penalties on uncertain tax position | $ 1,328 | $ 1,286 | $ 1,432

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