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Effective Tax Rate Reconciliation (Details)
12 Months Ended
Jun. 30, 2016
Rate
Jun. 30, 2015
Rate
Jun. 30, 2014
Rate
Income Tax Disclosure [Abstract]      
Computed expected tax expense 35.00% 35.00% 35.00%
State income taxes, net of federal income tax benefits 1.90% 1.40% 2.80%
Research and development credit (2.50%) (1.50%) (0.80%)
Domestic production activities deduction (1.90%) (2.00%) (2.20%)
Sale of subsidiary stock (1.70%) 0.00% 0.00%
Other reconciling items (net) 0.20% 0.40% 0.30%
Effective Income Tax Rate Continuing Operations, percent 31.00% 33.30% 35.10%