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Accumulated Other Comprehensive Loss - Reclassifications Out of AOCL (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Dec. 27, 2018
Dec. 28, 2017
Dec. 27, 2018
Dec. 28, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other expense $ (486) $ (493) $ (973) $ (985)
Income tax expense 3,814 4,954 5,605 9,963
Amortization of Defined Benefit Pension Items [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Total before tax (263) (281) (526) (560)
Amortization of defined pension items, net of tax (197) (170) (394) (341)
Reclassifications from AOCL to Earnings [Member] | Unrecognized Prior Service Cost [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other expense (240) (240) (479) (479)
Reclassifications from AOCL to Earnings [Member] | Unrecognized Net Loss [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other expense (23) (41) (47) (81)
Reclassifications from AOCL to Earnings [Member] | Amortization of Defined Benefit Pension Items [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Income tax expense $ 66 $ 111 $ 132 $ 219