Retirement Plan - Schedule of Net Periodic Benefit Cost (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Mar. 28, 2019	Mar. 29, 2018	Mar. 28, 2019	Mar. 29, 2018
Retirement Benefits [Abstract]
Service cost	$ 152	$ 152	$ 457	$ 456
Interest cost	224	213	671	638
Amortization of prior service cost	239	239	718	718
Amortization of loss	24	40	71	121
Net periodic benefit cost	$ 639	$ 644	$ 1,917	$ 1,933

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Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan.

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Amount of cost recognized for passage of time related to defined benefit plan.

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Amount of net periodic benefit cost (credit) for defined benefit plan.

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Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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