Balance Sheet Accounts (Summary of Cash and Cash Equivalents) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Cash	$ 112,996	$ 89,847
Cash equivalents	4,284	4,275
Total cash and cash equivalents	$ 117,280	$ 94,122	$ 88,334	$ 76,225