Changes in AOCI, Net of Tax (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 27, 2020	Mar. 29, 2019	Mar. 27, 2020	Mar. 29, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 928,327	$ 801,533	$ 863,099	$ 740,939
Tax effects
Total other comprehensive (loss) income, net of tax	(8,231)	998	(7,997)	1,178
Ending Balance	933,409	828,888	933,409	828,888
Unrealized net (Losses) Gains on Available-for- sale Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			952	(1,091)
Other comprehensive income before reclassification adjustment			(1,310)	1,203
Amounts reclassified out of AOCI to the unaudited condensed consolidated statements of operations and comprehensive income			(93)	196
Total other comprehensive (loss) income, net of tax			(1,403)	1,399
Ending Balance	(451)	308	(451)	308
Unrealized net (Losses) Gains on Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			32	33
Other comprehensive income before reclassification adjustment			(7,565)
Amounts reclassified out of AOCI to the unaudited condensed consolidated statements of operations and comprehensive income				(2)
Total other comprehensive (loss) income, net of tax			(6,719)	(2)
Ending Balance	(6,687)	31	(6,687)	31
Retirement benefit plan - Prior service cost
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(2,537)	0
Other comprehensive income before reclassification adjustment			478
Total other comprehensive (loss) income, net of tax			478	0
Ending Balance	(2,059)	0	(2,059)	0
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(833)	(199)
Other comprehensive income before reclassification adjustment			(353)	(219)
Total other comprehensive (loss) income, net of tax			(353)	(219)
Ending Balance	(1,186)	(418)	(1,186)	(418)
AOCI Attributable to Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(2,386)	(1,257)
Other comprehensive income before reclassification adjustment			(8,750)	984
Amounts reclassified out of AOCI to the unaudited condensed consolidated statements of operations and comprehensive income			753	194
Total other comprehensive (loss) income, net of tax			(7,997)	1,178
Ending Balance	$ (10,383)	$ (79)	$ (10,383)	$ (79)