The cash outflow for a financial contract that meets the hedge criteria as either cash flow hedge, fair value hedge or hedge of net investment in foreign operations.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 27
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3581-108585

Name:	us-gaap_PaymentsForHedgeFinancingActivities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Convertible Senior Notes - Schedule of Note Hedges (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Nov. 30, 2013	Mar. 31, 2019	Jun. 30, 2017
2022 Note Hedge
Derivative [Line Items]
Purchase		$ 128,017
Initial Shares (in shares)			5,806,936
Shares as of March 31, 2019 (in shares)		5,806,936
2018 Note Hedge
Derivative [Line Items]
Purchase		$ 135,815
Initial Shares (in shares)	7,783,023
Shares as of March 31, 2019 (in shares)		0