Balance Sheet Accounts (Components of Property and Equipment) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Jun. 30, 2018
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 155,820	$ 147,116
Less: accumulated depreciation and amortization	(81,321)	(68,597)
Property and equipment, net	74,499	78,519
Computers and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	70,121	60,677
Purchased software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	22,968	21,389
Office equipment, furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	11,564	14,980
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 51,167	$ 50,070