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Retirement Plan - Schedule of Net Periodic Benefit Costs (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Dec. 24, 2015
Dec. 25, 2014
Dec. 24, 2015
Dec. 25, 2014
Compensation and Retirement Disclosure [Abstract]        
Service cost $ 122 $ 97 $ 245 $ 193
Interest cost 212 160 422 321
Amortization of prior service cost 240 240 479 479
Amortization of loss 13   25  
Net periodic benefit cost $ 587 $ 497 $ 1,171 $ 993