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Accumulated Other Comprehensive Loss - Reclassifications Out of AOCL (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Dec. 28, 2017
Dec. 29, 2016
Dec. 28, 2017
Dec. 29, 2016
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Unrecognized prior service cost $ (240) $ (240) $ (479) $ (479)
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Unrecognized net loss (41) (91) (81) (182)
Amortization of Defined Benefit Pension Items [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Total amortization of pension items before tax (281) (331) (560) (661)
Income tax expense 111 126 219 251
Amortization of defined pension items, net of tax $ (170) $ (205) $ (341) $ (410)