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FAIR VALUE MEASUREMENT - Assets and Liabilities Measured At Fair Value (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Assets: |  |
Cash equivalents—Money market funds | $ 258,258 | $ 252,650
Equity securities, at fair value | 38,400 | 82,823
Available-for-sale debt securities | 10,232 |
Trading securities held in a "rabbi trust" | 443 | 399
Total assets | 307,333 | 335,872
Liabilities: |  |
Deferred compensation accrual "rabbi trust" | 460 | 396
Total liabilities | 460 | 396
Level 1 |  |
Assets: |  |
Cash equivalents—Money market funds | 258,258 | 252,650
Equity securities, at fair value | 15 | 36
Available-for-sale debt securities | 0 |
Trading securities held in a "rabbi trust" | 443 | 399
Total assets | 258,716 | 253,085
Liabilities: |  |
Deferred compensation accrual "rabbi trust" | 460 | 396
Total liabilities | 460 | 396
Level 2 |  |
Assets: |  |
Cash equivalents—Money market funds | 0 | 0
Equity securities, at fair value | 0 | 0
Available-for-sale debt securities | 0 |
Trading securities held in a "rabbi trust" | 0 | 0
Total assets | 0 | 0
Liabilities: |  |
Deferred compensation accrual "rabbi trust" | 0 | 0
Total liabilities | 0 | 0
Level 3 |  |
Assets: |  |
Cash equivalents—Money market funds | 0 | 0
Equity securities, at fair value | 38,385 | 82,787
Available-for-sale debt securities | 10,232 |
Trading securities held in a "rabbi trust" | 0 | 0
Total assets | 48,617 | 82,787
Liabilities: |  |
Deferred compensation accrual "rabbi trust" | 0 | 0
Total liabilities | $ 0 | $ 0

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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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). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aa) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481830/320-10-45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479130/326-30-45-1 + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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- Definition Aggregate carrying value as of the balance sheet date of the liabilities for deferred compensation arrangements. Represents currently earned compensation under cash arrangements (such as a profit-sharing plan, rabbi trust, and employee contract--excluding equity-based arrangements) that is not actually paid until a later date. + References No definition available. + Details
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