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Retirement Plan - Schedule of Net Periodic Pension Cost (Detail) - USD ($)
$ in Thousands
12 Months Ended
Jun. 28, 2018
Jun. 29, 2017
Jun. 30, 2016
Retirement Benefits [Abstract]      
Service cost $ 607 $ 631 $ 491
Interest cost 851 811 843
Recognized loss amortization 162 365 50
Prior service cost amortization 957 957 957
Net periodic pension cost $ 2,577 $ 2,764 $ 2,341