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MARKETABLE SECURITIES - Continuous Unrealized Loss Position (Details) - USD ($) | 3 Months Ended | 6 Months Ended
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Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Less Than 12 Months Estimated Fair Market Value, Total marketable securities | $ 245,800,000 |  | $ 245,800,000 |
Less Than 12 Months Gross Unrealized Losses, Total marketable securities | (6,188,000) |  | (6,188,000) |
12 Months or Longer Estimated Fair Market Value, Total marketable securities | 10,533,000 |  | 10,533,000 |
12 Months or Longer Gross Unrealized Losses, Total marketable securities | (318,000) |  | (318,000) |
Total Estimated Fair Market Value, Total marketable securities | 256,333,000 |  | 256,333,000 |
Total Gross Unrealized Losses, Total marketable securities | (6,506,000) |  | (6,506,000) |
Unrealized losses on marketable securities | 0 | $ 0 | 0 | $ 0
Corporate securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Less Than 12 Months Estimated Fair Market Value, Total marketable securities | 245,800,000 |  | 245,800,000 |
Less Than 12 Months Gross Unrealized Losses, Total marketable securities | (6,188,000) |  | (6,188,000) |
12 Months or Longer Estimated Fair Market Value, Total marketable securities | 10,533,000 |  | 10,533,000 |
12 Months or Longer Gross Unrealized Losses, Total marketable securities | (318,000) |  | (318,000) |
Total Estimated Fair Market Value, Total marketable securities | 256,333,000 |  | 256,333,000 |
Total Gross Unrealized Losses, Total marketable securities | $ (6,506,000) |  | $ (6,506,000) |

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, 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 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + Details
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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 continuous unrealized loss position for 12 months or longer, 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 7 -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 + Details
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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 continuous unrealized loss position for less than 12 months, 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 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27337-111563 + Details
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