Stockholders' Equity (Shares Reserved for Issuance) (Details) - shares shares in Thousands	Jun. 30, 2016	Jun. 30, 2015
Class Of Stock [Line Items]
Shares reserved for future issuance	26,011	32,723
Stock Option Plan
Class Of Stock [Line Items]
Shares reserved for future issuance	10,609	15,273
Employee Stock Options And Awards Available For Grant
Class Of Stock [Line Items]
Shares reserved for future issuance	5,401	5,450
Employee Stock Purchase Plan
Class Of Stock [Line Items]
Shares reserved for future issuance	10,001	12,000