Fair Value Measurements (Details) $ in Thousands	Sep. 30, 2015 USD ($)
Level 3
Financial assets carried at fair value:
Term loan fair value	$ 294,800
Recurring basis
Financial assets carried at fair value:
Total financial assets	643,421
Total financial liabilities	(1,576)
Recurring basis \| Money market funds
Financial assets carried at fair value:
Cash equivalents:	340,573
Recurring basis \| Corporate debt securities
Financial assets carried at fair value:
Cash equivalents:	25,109
Marketable securities:	109,335
Recurring basis \| Commercial paper
Financial assets carried at fair value:
Cash equivalents:	24,000
Marketable securities:	140,245
Recurring basis \| Level 1
Financial assets carried at fair value:
Total financial assets	340,573
Total financial liabilities	0
Recurring basis \| Level 1 \| Money market funds
Financial assets carried at fair value:
Cash equivalents:	340,573
Recurring basis \| Level 1 \| Corporate debt securities
Financial assets carried at fair value:
Cash equivalents:	0
Marketable securities:	0
Recurring basis \| Level 1 \| Commercial paper
Financial assets carried at fair value:
Cash equivalents:	0
Marketable securities:	0
Recurring basis \| Level 2
Financial assets carried at fair value:
Total financial assets	302,848
Total financial liabilities	(1,576)
Recurring basis \| Level 2 \| Money market funds
Financial assets carried at fair value:
Cash equivalents:	0
Recurring basis \| Level 2 \| Corporate debt securities
Financial assets carried at fair value:
Cash equivalents:	25,109
Marketable securities:	109,335
Recurring basis \| Level 2 \| Commercial paper
Financial assets carried at fair value:
Cash equivalents:	24,000
Marketable securities:	140,245
Recurring basis \| Level 3
Financial assets carried at fair value:
Total financial assets	0
Total financial liabilities	0
Recurring basis \| Level 3 \| Money market funds
Financial assets carried at fair value:
Cash equivalents:	0
Recurring basis \| Level 3 \| Corporate debt securities
Financial assets carried at fair value:
Cash equivalents:	0
Marketable securities:	0
Recurring basis \| Level 3 \| Commercial paper
Financial assets carried at fair value:
Cash equivalents:	0
Marketable securities:	0
Prepaid and other current assets \| Foreign currency forward contracts \| Recurring basis
Financial assets carried at fair value:
Foreign currency forward contracts	3,508
Prepaid and other current assets \| Foreign currency forward contracts \| Recurring basis \| Level 1
Financial assets carried at fair value:
Foreign currency forward contracts	0
Prepaid and other current assets \| Foreign currency forward contracts \| Recurring basis \| Level 2
Financial assets carried at fair value:
Foreign currency forward contracts	3,508
Prepaid and other current assets \| Foreign currency forward contracts \| Recurring basis \| Level 3
Financial assets carried at fair value:
Foreign currency forward contracts	0
Other Assets \| Foreign currency forward contracts \| Recurring basis
Financial assets carried at fair value:
Foreign currency forward contracts	651
Other Assets \| Foreign currency forward contracts \| Recurring basis \| Level 1
Financial assets carried at fair value:
Foreign currency forward contracts	0
Other Assets \| Foreign currency forward contracts \| Recurring basis \| Level 2
Financial assets carried at fair value:
Foreign currency forward contracts	651
Other Assets \| Foreign currency forward contracts \| Recurring basis \| Level 3
Financial assets carried at fair value:
Foreign currency forward contracts	0
Other liabilities, current portion \| Foreign currency forward contracts \| Recurring basis
Financial assets carried at fair value:
Foreign currency forward contracts	(1,552)
Other liabilities, current portion \| Foreign currency forward contracts \| Recurring basis \| Level 1
Financial assets carried at fair value:
Foreign currency forward contracts	0
Other liabilities, current portion \| Foreign currency forward contracts \| Recurring basis \| Level 2
Financial assets carried at fair value:
Foreign currency forward contracts	(1,552)
Other liabilities, current portion \| Foreign currency forward contracts \| Recurring basis \| Level 3
Financial assets carried at fair value:
Foreign currency forward contracts	0
Other liabilities, excluding current portion \| Foreign currency forward contracts \| Recurring basis
Financial assets carried at fair value:
Foreign currency forward contracts	(24)
Other liabilities, excluding current portion \| Foreign currency forward contracts \| Recurring basis \| Level 1
Financial assets carried at fair value:
Foreign currency forward contracts	0
Other liabilities, excluding current portion \| Foreign currency forward contracts \| Recurring basis \| Level 2
Financial assets carried at fair value:
Foreign currency forward contracts	(24)
Other liabilities, excluding current portion \| Foreign currency forward contracts \| Recurring basis \| Level 3
Financial assets carried at fair value:
Foreign currency forward contracts	0
Variable Interest Entity, Primary Beneficiary \| BioAxone Biosciences Inc \| Level 1
Financial assets carried at fair value:
Cash and cash equivalents	$ 75,400

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

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

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

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