The Company and its Significant Accounting Policies - Schedule of all potentially dilutive securities excluded from the computation of basic and diluted net income (loss) per common 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]
Anti-dilutive securities excluded from the computation of diluted net income (loss) per share (in shares)	7,843	16,068	16,222
Stock options
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from the computation of diluted net income (loss) per share (in shares)	2,684	2,463	2,377
RSUs, PSUs and MSUs
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from the computation of diluted net income (loss) per share (in shares)	5,159	5,227	5,467
3.50% Convertible Notes
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from the computation of diluted net income (loss) per share (in shares)		8,378	8,378