Income Taxes Effective Tax Rate Reconciliation (Details)	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Computed expected tax expense	35.00%	35.00%	35.00%
State income taxes, net of federal income tax benefits	1.40%	2.80%	2.20%
Research and development credit	(1.50%)	(0.80%)	(3.50%)
Domestic production activities deduction	(2.00%)	(2.20%)	(2.30%)
Other reconciling items (net)	0.40%	0.30%	0.20%
Effective Income Tax Rate Continuing Operations, percent	33.30%	35.10%	31.60%