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Retirement Plan - Changes in Projected Benefit Obligation (Detail) - USD ($)
$ in Thousands
12 Months Ended
Jun. 27, 2019
Jun. 28, 2018
Jun. 29, 2017
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Projected benefit obligation at beginning of year $ 21,934 $ 21,641  
Service cost 610 607 $ 631
Interest cost 895 851 811
Actuarial loss (gain) 2,597 (511) (1,938)
Benefits paid (654) (654)  
Projected benefit obligation at end of year $ 25,382 $ 21,934 $ 21,641