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Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Dec. 24, 2020
Dec. 26, 2019
Sep. 26, 2019
Dec. 24, 2020
Dec. 26, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Balance at beginning of period       $ (8,630)  
Net current-period other comprehensive income $ 311 $ 258   623 $ 515
Impact of adopting ASU 2018-02     $ 0    
Balance at end of period (8,007) (4,786)   (8,007) (4,786)
Accumulated Other Comprehensive Loss [Member]          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Balance at beginning of period [1]     (4,325) (8,630) (4,325)
Other comprehensive income before reclassifications [1]       0 0
Amounts reclassified from accumulated other comprehensive loss [1]       830 687
Tax effect [1]       (207) (172)
Net current-period other comprehensive income [1]       623 515
Impact of adopting ASU 2018-02     $ (976) 0 [1] (976) [1]
Balance at end of period [1] $ (8,007) $ (4,786)   $ (8,007) $ (4,786)
[1] Amounts in parenthesis indicate debits/expense.