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Segment Performance Based on Income (Loss) before Interest Income and Other Income and Expense (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2012
Segment Reporting Information [Line Items]      
Revenues $ 778,216 $ 613,165 $ 496,005
Depreciation and amortization 13,819 8,889 9,069
Segment operating income (loss) 274,442 228,002 180,318
Research
     
Segment Reporting Information [Line Items]      
Depreciation and amortization 2,001 2,182 2,021
Segment operating income (loss) (64,981) (56,428) (49,231)
Molecular Diagnostics
     
Segment Reporting Information [Line Items]      
Revenues 748,198 582,392 472,390
Depreciation and amortization 9,887 4,974 5,395
Segment operating income (loss) 338,020 291,509 237,737
Pharmaceutical and Clinical Services
     
Segment Reporting Information [Line Items]      
Revenues 30,018 30,773 23,615
Depreciation and amortization 1,931 1,733 1,653
Segment operating income (loss) $ 1,403 $ (7,079) $ (8,188)