Financial Instruments Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands		Mar. 30, 2018	Jun. 30, 2017
Assets
Derivative assets			$ 15
Total		$ 184,572	154,050
Liabilities
Derivative liabilities		29
Total		29
Cash Equivalents
Assets
Marketable securities		15,128	2,585
Corporate bonds and commercial papers
Assets
Marketable securities		124,542	98,274
U.S. agency and U.S. treasury securities
Assets
Marketable securities		40,629	50,666
Sovereign And Municipal Securities
Assets
Marketable securities		4,273	2,510
Significant Other Observable Inputs (Level 2)
Assets
Derivative assets	[1]		15
Total		184,572	154,050
Liabilities
Derivative liabilities	[2]	29
Total		29
Significant Other Observable Inputs (Level 2) | Cash Equivalents
Assets
Marketable securities		15,128	2,585
Significant Other Observable Inputs (Level 2) | Corporate bonds and commercial papers
Assets
Marketable securities		124,542	98,274
Significant Other Observable Inputs (Level 2) | U.S. agency and U.S. treasury securities
Assets
Marketable securities		40,629	50,666
Significant Other Observable Inputs (Level 2) | Sovereign And Municipal Securities
Assets
Marketable securities		$ 4,273	$ 2,510

[1] Foreign currency forward contracts with notional amount of $1.0 million and Canadian Dollars 0.6 million.

[2] Foreign currency forward contracts with notional amount of $14.0 million and Canadian Dollars 0.1 million.