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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Jun. 30, 2017
--- | --- | ---
Deferred tax assets: |  |
Tax credits and net operating losses | $ 171,701 | $ 134,052
Employee benefits accrual | 64,707 | 106,637
Stock-based compensation | 8,902 | 15,252
Inventory reserves | 62,232 | 95,200
Non-deductible reserves | 29,841 | 43,140
Depreciation and amortization | 701 | 3,415
Unearned revenue | 11,104 | 15,757
Unrealized loss on investments | 956 | 0
Other | 25,602 | 26,538
Gross deferred tax assets | 375,746 | 439,991
Valuation allowance | (163,570) | (120,708)
Net deferred tax assets | 212,176 | 319,283
Deferred tax liabilities: |  |
Unremitted earnings of foreign subsidiaries not indefinitely reinvested | (7,146) | (13,213)
Deferred profit | (13,027) | (13,657)
Unrealized gain on investments | 0 | (2,707)
Total deferred tax liabilities | (20,173) | (29,577)
Total net deferred tax assets | $ 192,003 | $ 289,706

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