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MARKETABLE SECURITIES - Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Jun. 30, 2021
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | $ 791,517 | $ 339,282
Gross Unrealized Losses | (3,007) | (334)
Corporate debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 383,964 | 161,012
Gross Unrealized Losses | (1,312) | (135)
Sovereign securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 1,993 |
Gross Unrealized Losses | (10) |
Municipal securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 60,649 | 21,605
Gross Unrealized Losses | (247) | (33)
U.S. Government agency securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 66,225 | 38,904
Gross Unrealized Losses | (224) | (49)
U.S. Treasury securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 278,686 | 117,761
Gross Unrealized Losses | $ (1,214) | $ (117)

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