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Employee Benefit Plans (Pension Benefit Plan) - Summary of Net Amounts Recognized Balance Sheet for the Unfunded Pension Liability (Detail) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Compensation And Retirement Disclosure [Abstract] |  |
Current liability | $ 0 | $ 0
Pension liability | 15,886 | 13,086
Total | $ 15,886 | $ 13,086

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