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Income Taxes - Reconciliation of Income Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Income Taxes at U.S Statutory Rate | $ 412 | $ 65,359 | $ 77,286
State Income Taxes, Net of Federal Tax Benefits | 1,283 | 289 | 2,975
US Income Tax Provided On International Income | 12,422 | 7,347 | 1,010
Combined Tax Effects of International Income | 10,583 | 162 | (9,333)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Amount | 5,651 | 0 | 0
Change in valuation allowance and other uncertain tax positions | 755 | (1,473) | (90,817)
Research and Development Credit | (4,093) | (3,911) | (3,141)
Change In Permanent Reinvestment Assertion | 0 | 6,093 | 0
Combined effects of tax reform |  | (9,280) | 86,044
Discrete Benefit for Swiss Tax Reform | (14,500) |  |
Effective income tax rate reconciliation, Combined effects of U.S. CARES Act, Amount | (6,913) |  |
Adjustment to deferred tax charges on intra-entity transfers | 0 | 0 | 5,297
Other | 1,407 | (1,227) | 660
Provision for income taxes | $ 7,007 | $ 63,359 | $ 69,981

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