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MARKETABLE SECURITIES - Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Jun. 30, 2023
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 Months, Fair Value | $ 321,044 | $ 688,793
Less than 12 Months, Gross Unrealized Losses | (933) | (7,017)
12 Months or Greater, Fair Value | 319,954 | 398,397
12 Months or Greater, Gross Unrealized Losses | (4,476) | (9,333)
Fair Value | 640,998 | 1,087,190
Gross Unrealized Losses | (5,409) | (16,350)
Corporate debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 Months, Fair Value | 190,129 | 310,613
Less than 12 Months, Gross Unrealized Losses | (371) | (2,242)
12 Months or Greater, Fair Value | 139,118 | 161,263
12 Months or Greater, Gross Unrealized Losses | (1,621) | (3,671)
Fair Value | 329,247 | 471,876
Gross Unrealized Losses | (1,992) | (5,913)
Municipal securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 Months, Fair Value | 6,173 | 9,011
Less than 12 Months, Gross Unrealized Losses | (29) | (199)
12 Months or Greater, Fair Value | 13,192 | 17,253
12 Months or Greater, Gross Unrealized Losses | (214) | (538)
Fair Value | 19,365 | 26,264
Gross Unrealized Losses | (243) | (737)
U.S. Government agency securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 Months, Fair Value | 42,904 | 80,793
Less than 12 Months, Gross Unrealized Losses | (74) | (459)
12 Months or Greater, Fair Value | 2,770 | 36,406
12 Months or Greater, Gross Unrealized Losses | (9) | (459)
Fair Value | 45,674 | 117,199
Gross Unrealized Losses | (83) | (918)
U.S. Treasury securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 Months, Fair Value | 81,838 | 288,376
Less than 12 Months, Gross Unrealized Losses | (459) | (4,117)
12 Months or Greater, Fair Value | 164,874 | 183,475
12 Months or Greater, Gross Unrealized Losses | (2,632) | (4,665)
Fair Value | 246,712 | 471,851
Gross Unrealized Losses | $ (3,091) | $ (8,782)

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