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MARKETABLE SECURITIES - Marketable Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Interest receivable | $ 2,700 | $ 1,200
Amortized Cost | 264,736 | 253,764
Gross Unrealized Gains | 22 | 71
Gross Unrealized Losses | (2,862) | (5,394)
Estimated Fair Market Value | 261,896 | 248,441
Investments due in 3 months or less: |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 36,088 | 21,803
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (207) | (135)
Estimated Fair Market Value | 35,881 | 21,668
Investments due in 4-12 months: |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 39,377 | 173,833
Gross Unrealized Gains | 4 | 0
Gross Unrealized Losses | (664) | (4,019)
Estimated Fair Market Value | 38,717 | 169,814
Investments due in 12 months or greater: |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 189,271 | 58,128
Gross Unrealized Gains | 18 | 71
Gross Unrealized Losses | (1,991) | (1,240)
Estimated Fair Market Value | 187,298 | 56,959
Corporate securities | Investments due in 3 months or less: |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 36,088 | 21,803
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (207) | (135)
Estimated Fair Market Value | 35,881 | 21,668
Corporate securities | Investments due in 4-12 months: |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 39,377 | 173,833
Gross Unrealized Gains | 4 | 0
Gross Unrealized Losses | (664) | (4,019)
Estimated Fair Market Value | 38,717 | 169,814
Corporate securities | Investments due in 12 months or greater: |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 189,271 | 58,128
Gross Unrealized Gains | 18 | 71
Gross Unrealized Losses | (1,991) | (1,240)
Estimated Fair Market Value | $ 187,298 | $ 56,959

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 + Details
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