Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Tax Credit Carryforward [Line Items]
Income taxes at federal statutory rates	28.00%
Reductions as a result of a lapse of the applicable statute of limitations	$ 81	$ 273
Settlements of previously recognized positions	0	793
Excess Tax Benefit from Share-based Compensation, Operating Activities	7,897	$ 4,066
Operating Loss Carryforward, Increase In Carrying Value	3,716
Tax Cuts And Jobs Act Of 2017 Change In Tax Rate Deferred Tax Asset Income Tax Expense Benefit	861
Tax Cuts and Jobs Act of 2017, Transition Tax for Accumulated Foreign Earnings,Income Tax Expense (Benefit)	5,627
Tax Cuts And Jobs Act Of 2017 Incomplete Accounting Transition Tax For Accumulated Foreign Earnings Provisional Income Tax Expense Benefit	801
Tax Cuts and Jobs Act of 2017,Incomplete Accounting, Additional Cash Paid	386
Domestic Tax Authority | Research and development credit carryforwards
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	$ 1,227
Domestic Tax Authority | Research and development credit carryforwards | Maximum
Tax Credit Carryforward [Line Items]
Tax carryforward expiration year	2029
State and Local Jurisdiction | Research and development credit carryforwards
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	$ 17,557