Income Taxes - Provision For (Benefit From) Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Income Tax Reconciliation
Federal tax provision at statutory rate	$ 73,723	$ 62,815	$ 44,989
State income taxes	1,153	2,114	78
Subpart F and dividend income	3,581	2,799	6,667
Foreign taxes and rate differences	(663)	(222)	1,881
Stock-based compensation	1,359	763	631
Tax credits	(3,867)	(3,562)	(8,902)
Tax contingencies	(581)	(641)	(261)
Return to provision adjustments	658	384	150
Domestic Production Activity Deduction	(4,892)	(3,600)	(2,443)
Valuation allowance	49	176	(16)
Other	168	38	(24)
Provision for income taxes	$ 70,688	$ 61,064	$ 42,750