Balance Sheet Accounts (Components of Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 30, 2017
Line Of Credit Facility [Line Items]
Current portion of long-term debt	$ 22,426	$ 12,280
Less: unamortized debt issuance costs	(538)	(164)
Long-term debt, less current portion	160,712	80,422
Less: unamortized debt issuance costs	(1,350)	(846)
Total debt	183,138	92,702
Term Loan
Line Of Credit Facility [Line Items]
Current portion of long-term debt	22,964	12,444
Long-term debt, less current portion	152,062	71,268
Revolver
Line Of Credit Facility [Line Items]
Long-term debt, less current portion	$ 10,000	$ 10,000