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Schedule of Share-Based Compensation Recognized in Consolidated Statements of Income and Comprehensive Income (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Total share-based compensation expense $ 6,880 $ 6,935
Cost Of Molecular Diagnostic Testing
   
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Total share-based compensation expense 198 223
Cost of Pharmaceutical and Clinical Services
   
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Total share-based compensation expense 160 62
Research And Development Expense
   
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Total share-based compensation expense 764 782
Selling, General, and Administrative Expenses
   
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Total share-based compensation expense $ 5,758 $ 5,868