INVESTMENTS - Net Investment Gains and Losses (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Realized Investment Gains (Losses) [Abstract]
Net realized gains (losses) on fixed maturity, available-for-sale securities	$ (1,404)	$ (7,274)	$ (442)
Change in allowance for credit losses	0	1	1
Net realized gains (losses) on equity securities sold	0	1,362	150
Unrealized gains (losses) on equity securities still held at reporting date	0	0	1,842
Net gains (losses) recognized on equity securities	0	1,362	1,992
Net realized gains (losses) on mortgage loans	(2,864)	10	(5)
Net realized gains (losses) on other long-term assets	446	472	(319)
Net realized gains (losses) on real estate	0	0	47
Net Realized Investment Gains (Losses)	$ (3,822)	$ (5,429)	$ 1,274

Amount, excluding accrued interest, of credit loss expense (reversal of expense) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) with previously recorded allowance and not intended to be sold and not more likely than not will be required to sell before recovery of amortized cost basis.

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Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Amount of realized gain (loss) from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Amount of unrealized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Amount of gain (loss) included in earnings for investments classified as other.

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The net gain (loss) resulting from sales and other disposals of real estate owned for investment purposes.

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Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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