Schedule of Potential Shares of Common Stock Excluded from the Calculation of Diluted Net Income Per Share (Details) - shares shares in Thousands	12 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total anti-dilutive shares	7,466	140	153
0.25% Convertible Senior Note Due 2022
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total anti-dilutive shares	7,331
Stock Options And Restricted Shares
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total anti-dilutive shares	135	140	153

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration