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MARKETABLE SECURITIES - Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Jun. 30, 2023
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Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 Months, Fair Value | $ 892,435 |
Less than 12 Months, Gross Unrealized Losses | (6,111) |
12 Months or Greater, Fair Value | 449,457 |
12 Months or Greater, Gross Unrealized Losses | (8,974) |
Fair Value | 1,341,892 |
Gross Unrealized Losses | (15,085) |
Corporate debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 Months, Fair Value | 463,017 | $ 310,613
Less than 12 Months, Gross Unrealized Losses | (2,772) | (2,242)
12 Months or Greater, Fair Value | 165,161 | 161,263
12 Months or Greater, Gross Unrealized Losses | (3,244) | (3,671)
Fair Value | 628,178 | 471,876
Gross Unrealized Losses | (6,016) | (5,913)
Municipal securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 Months, Fair Value | 11,480 | 9,011
Less than 12 Months, Gross Unrealized Losses | (147) | (199)
12 Months or Greater, Fair Value | 14,834 | 17,253
12 Months or Greater, Gross Unrealized Losses | (409) | (538)
Fair Value | 26,314 | 26,264
Gross Unrealized Losses | (556) | (737)
Sovereign securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 Months, Fair Value |  | 80,793
Less than 12 Months, Gross Unrealized Losses |  | (459)
12 Months or Greater, Fair Value |  | 36,406
12 Months or Greater, Gross Unrealized Losses |  | (459)
Fair Value |  | 117,199
Gross Unrealized Losses |  | (918)
U.S. Government agency securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 Months, Fair Value | 112,180 | 288,376
Less than 12 Months, Gross Unrealized Losses | (736) | (4,117)
12 Months or Greater, Fair Value | 19,667 | 183,475
12 Months or Greater, Gross Unrealized Losses | (140) | (4,665)
Fair Value | 131,847 | 471,851
Gross Unrealized Losses | (876) | (8,782)
U.S. Treasury securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 Months, Fair Value | 305,758 | 688,793
Less than 12 Months, Gross Unrealized Losses | (2,456) | (7,017)
12 Months or Greater, Fair Value | 249,795 | 398,397
12 Months or Greater, Gross Unrealized Losses | (5,181) | (9,333)
Fair Value | 555,553 | 1,087,190
Gross Unrealized Losses | $ (7,637) | $ (16,350)

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