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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	3 Months Ended		9 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]
Revenue	$ 182,924	$ 156,472	$ 589,450	$ 439,050
Depreciation and amortization	3,479	4,455	8,291	6,635
Segment operating income (loss)	55,287	57,918	221,188	162,086
Research
Segment Reporting Information [Line Items]
Depreciation and amortization	502	1,210	1,494	1,818
Segment operating income (loss)	(15,455)	(17,224)	(48,422)	(47,989)
Molecular Diagnostics
Segment Reporting Information [Line Items]
Revenue	176,191	148,384	565,335	416,304
Depreciation and amortization	2,506	2,424	5,335	3,543
Segment operating income (loss)	70,815	76,165	266,794	214,195
Companion Diagnostics
Segment Reporting Information [Line Items]
Revenue	6,733	8,088	24,115	22,746
Depreciation and amortization	471	821	1,462	1,274
Segment operating income (loss)	$ (73)	$ (1,023)	$ 2,816	$ (4,120)

X

- Definition

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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+ References

No definition available.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

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