Employee Benefit Plans (Common Stock Reserved for Future Issuance) (Details) - shares shares in Thousands	Sep. 30, 2020	Jun. 30, 2020
Class Of Stock [Line Items]
Shares reserved for issuance	25,893	30,878
2014 Employee Stock Purchase Plan
Class Of Stock [Line Items]
Shares reserved for issuance	5,913	7,364
Employee Stock Options and Awards Outstanding
Class Of Stock [Line Items]
Shares reserved for issuance	13,549	10,396
2013 Equity Incentive Plan Shares Available for Grant
Class Of Stock [Line Items]
Shares reserved for issuance	6,431	13,118