Income Taxes (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Income Tax Reconciliation
Federal tax provision (benefit) at statutory rate	$ 62,815	$ 44,989	$ 20,103
State income taxes	2,114	78	88
Subpart F and dividend income	2,799	6,667	4,456
Foreign taxes and rate differences	(222)	1,881	2,298
Stock-based compensation	763	631	900
Tax credits	(3,562)	(8,902)	(4,816)
Tax contingencies	(641)	(261)	(168)
Return to provision adjustments	384	150	(149)
Domestic production activity deduction	(3,600)	(2,443)	0
Valuation allowance	176	(16)	(1,813)
Benefit from foreign restructuring	0	0	(9,266)
Other	38	(24)	543
Provision for (benefit from) income taxes	$ 61,064	$ 42,750	$ 12,176