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INVESTMENTS - Equity Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Debt and Equity Securities, FV-NI [Line Items]
Cost	$ 543,833	$ 494,356
Gross unrealized gains	110,296	68,694
Gross unrealized losses	(65,618)	(77,797)
Fair value	588,511	485,253
Common stocks
Debt and Equity Securities, FV-NI [Line Items]
Cost	2,843	7,279
Gross unrealized gains	101	636
Gross unrealized losses	(398)	(442)
Fair value	2,546	7,473
Preferred stocks
Debt and Equity Securities, FV-NI [Line Items]
Cost	5,496	115
Gross unrealized gains	218	0
Gross unrealized losses	(113)	(43)
Fair value	5,601	72
Exchange-traded funds
Debt and Equity Securities, FV-NI [Line Items]
Cost	182,989	207,505
Gross unrealized gains	105,858	68,058
Gross unrealized losses	(1,572)	(5,757)
Fair value	287,275	269,806
Bond mutual funds
Debt and Equity Securities, FV-NI [Line Items]
Cost	352,505	279,457
Gross unrealized gains	4,119	0
Gross unrealized losses	(63,535)	(71,555)
Fair value	$ 293,089	$ 207,902

X

- Definition

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(2))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
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-Section 45
-Paragraph 1
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483467/210-10-45-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1A
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482736/825-10-45-1A

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Cost of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(1))
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Amount of unrealized gain on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 321
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 321
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
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-URI https://asc.fasb.org//1943274/2147479536/321-10-50-4

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