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Employee Benefit Plans - Summary of Expected Benefit Payments (Detail)
$ in Thousands
Dec. 31, 2016
USD ($)
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]  
2017 $ 2,782
2018 2,407
2020 2,146
2021 1,960
2021 1,785
2022 to 2026 $ 5,238