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Retirement Plan - Additional Information (Detail) - SERP [Member] - USD ($)
$ in Thousands
Jun. 25, 2020
Jun. 27, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Accumulated benefit obligation $ 25,839 $ 20,985
Current portion of the SERP liability 631 $ 645
Prior service cost to be recognized in the next fiscal year as net pension expense 478  
Net loss to be recognized in the next fiscal year as net pension expense $ 1,183