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Income Taxes Disclosure Tax Rates S-12 (Detail Level 4)
 12 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2009
Computed "expected" tax expense, percent 35.0 35.0 35.0
State income taxes net of federal income tax benefits, percent 2.6 2.5 2.7
Research and development credit, percent   (0.7) (3.0)
Permanent book/tax differences, percent (2.0) (0.9) (0.4)
Section 199 - prior year benefits, percent (0.2) (1.8) 0.0
Deferred tax adjustments, percent 0.5 0.7  
Valuation Allowance, percent 0.0 0.0 0.2
Other reconciling net, percent (0.1) 0.0 0.0
Effective Income Tax Rate Continuing Operations, percent 33.8 34.8 34.5