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Employee Benefit Plans (Pension Benefit Plan) - Schedule of Pension Benefit Payments Expected Future Service (Detail)
$ in Thousands
Dec. 31, 2016
USD ($)
Compensation And Retirement Disclosure [Abstract]  
2018 $ 549
2019 772
2020 1,090
2021 1,225
2022 1,315
2023 – 2027 6,301
Total $ 11,252