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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
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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

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