Balance Sheet Accounts (Components of Property and Equipment) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Jun. 30, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 151,802	$ 80,399
Less: accumulated depreciation and amortization	(65,315)	(50,159)
Property and equipment, net	86,487	30,240
Computers and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	69,712	34,716
Purchased software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	16,908	11,785
Office equipment, furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	18,143	10,852
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 47,039	$ 23,046