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Stock-Based Compensation Plans - Summary of Compensation Expense (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Dec. 27, 2018
Dec. 28, 2017
Dec. 27, 2018
Dec. 28, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]        
Stock-based compensation expense $ 900 $ 891 $ 1,516 $ 1,429