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Retirement Plan - Schedule of Net Periodic Benefit Costs (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Dec. 29, 2016
Dec. 24, 2015
Dec. 29, 2016
Dec. 24, 2015
Compensation and Retirement Disclosure [Abstract]        
Service cost $ 158 $ 122 $ 316 $ 245
Interest cost 202 212 405 422
Amortization of prior service cost 240 240 479 479
Amortization of loss 91 13 182 25
Net periodic benefit cost $ 691 $ 587 $ 1,382 $ 1,171