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Employee Benefit Plans - Components of Net Periodic Pension Cost for Defined Benefit Pension Plan and Retirement Plan (Detail) - USD ($)
$ in Thousands
3 Months Ended
Apr. 01, 2017
Apr. 02, 2016
Compensation and Retirement Disclosure [Abstract]    
Service cost $ 133 $ 133
Interest cost 332 342
Expected return on plan assets (383) (370)
Amortization of actuarial losses 203 191
Net periodic pension cost $ 285 $ 296