Balance Sheet Accounts (Components of Property and Equipment) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 151,007	$ 147,116
Less: accumulated depreciation and amortization	(74,783)	(68,597)
Property and equipment, net	76,224	78,519
Computers and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	63,456	60,677
Purchased software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	21,558	21,389
Office equipment, furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	15,034	14,980
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 50,959	$ 50,070