Effective Tax Rate Reconciliation (Details)	12 Months Ended
	Jun. 30, 2017 Rate	Jun. 30, 2016 Rate	Jun. 30, 2015 Rate
Income Tax Disclosure [Abstract]
Computed expected tax expense	35.00%	35.00%	35.00%
State income taxes, net of federal income tax benefits	2.60%	1.90%	1.40%
Research and development credit	(2.00%)	(2.50%)	(1.50%)
Domestic production activities deduction	(2.10%)	(1.90%)	(2.00%)
Sale of subsidiary stock	0.00%	(1.70%)	0.00%
Tax effects of share-based payments	(0.70%)	(0.00%)	(0.00%)
Other reconciling items (net)	0.20%	0.20%	0.40%
Effective Income Tax Rate Continuing Operations, percent	33.00%	31.00%	33.30%