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MARKETABLE SECURITIES - Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Jun. 30, 2021
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | $ 917,131 | $ 339,282
Gross Unrealized Losses | (15,084) | (334)
Corporate debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 439,540 | 161,012
Gross Unrealized Losses | (6,244) | (135)
Sovereign securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 2,969 |
Gross Unrealized Losses | (46) |
Municipal securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 65,352 | 21,605
Gross Unrealized Losses | (1,011) | (33)
U.S. Government agency securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 75,936 | 38,904
Gross Unrealized Losses | (1,012) | (49)
U.S. Treasury securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 333,334 | 117,761
Gross Unrealized Losses | $ (6,771) | $ (117)

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- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455 + Details
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