Stockholders' Equity (Shares Reserved for Issuance) (Details) - shares shares in Thousands	Jun. 30, 2017	Jun. 30, 2016
Class Of Stock [Line Items]
Shares reserved for issuance	25,140	26,011
2014 Employee Stock Purchase Plan
Class Of Stock [Line Items]
Shares reserved for issuance	7,785	10,001
Employee Stock Options and Awards Outstanding
Class Of Stock [Line Items]
Shares reserved for issuance	9,726	10,609
2013 Employee Plan Shares Available for Grant
Class Of Stock [Line Items]
Shares reserved for issuance	7,629	5,401