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Retirement Plan - Additional Information (Detail) - SERP [Member] - USD ($)
$ in Thousands
Jun. 27, 2019
Jun. 28, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Accumulated benefit obligation $ 20,985 $ 18,582
Current portion of the SERP liability 645 $ 646
Prior service cost to be recognized in the next fiscal year as net pension expense 957  
Net loss to be recognized in the next fiscal year as net pension expense $ 416