Balance Sheet Accounts (Components of Property and Equipment) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 30, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 126,459	$ 80,399
Less: accumulated depreciation and amortization	(57,894)	(50,159)
Property and equipment, net	68,565	30,240
Computers and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	63,539	34,716
Purchased software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	16,329	11,785
Office equipment, furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	17,272	10,852
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 29,319	$ 23,046