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Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Difference between expected income tax provision applying domestic federal statutory tax rate and reported income tax provision
Expected provision for Federal income taxes at the statutory rate	$ 19,887	$ 12,570	$ 10,670
State income taxes, net of Federal benefit	2,275	1,252	970
Charges without tax benefit	1,405	1,231	1,004
Change in valuation allowance	0	(140)	(544)
Cumulative non-deductible expenses	0	0	2,139
IRS S199 deduction	(1,546)	(844)	(687)
Research & Development Credit	(1,793)	(1,450)	0
Foreign tax differential	(182)	(160)	0
Other	(112)	(551)	(250)
Provision for income taxes	$ 19,934	$ 11,908	$ 13,302

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