Financial Instruments Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands		Sep. 28, 2018	Jun. 29, 2018
Assets
Derivative assets		$ 249
Total		150,813	$ 185,593
Liabilities
Derivative liabilities			1,745
Total			1,745
Cash Equivalents
Assets
Marketable securities		18,181	11,324
Corporate bonds and commercial papers
Assets
Marketable securities		95,923	127,705
U.S. agency and U.S. treasury securities
Assets
Marketable securities		33,745	43,410
Sovereign And Municipal Securities
Assets
Marketable securities		2,715	3,154
Significant Other Observable Inputs (Level 2)
Assets
Derivative assets	[1]	249
Total		150,813	185,593
Liabilities
Derivative liabilities	[2]		1,745
Total			1,745
Significant Other Observable Inputs (Level 2) | Cash Equivalents
Assets
Marketable securities		18,181	11,324
Significant Other Observable Inputs (Level 2) | Corporate bonds and commercial papers
Assets
Marketable securities		95,923	127,705
Significant Other Observable Inputs (Level 2) | U.S. agency and U.S. treasury securities
Assets
Marketable securities		33,745	43,410
Significant Other Observable Inputs (Level 2) | Sovereign And Municipal Securities
Assets
Marketable securities		$ 2,715	$ 3,154

[1] Foreign currency forward contracts with a notional amount of $6.0 million. Foreign currency option contracts with a notional amount of $19.0 million.

[2] Foreign currency forward contracts with a notional amount of $7.0 million and Canadian dollars 0.4 million. Foreign currency option contracts with a notional amount of $30.0 million.