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INVESTMENTS - Fixed Maturities Held to Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Held to maturity
Amortized cost	$ 503,776	$ 686,296
Allowance for expected credit losses	0	0
Net carrying value	503,776	686,296
Gross unrealized gains	2,220	303
Gross unrealized losses	(6,458)	(10,748)
Fair value	499,538	675,851
Corporate debt
Held to maturity
Amortized cost	123,992	95,200
Allowance for expected credit losses	0	0
Net carrying value	123,992	95,200
Gross unrealized gains	1,654	298
Gross unrealized losses	(6,327)	(8,827)
Fair value	119,319	86,671
Held-to-maturity securities with maturity after one year through three years	28,000	0
Held-to-maturity securities with maturity after three years through ten years	96,000	95,000
ABS
Held to maturity
Amortized cost	379,784	591,096
Allowance for expected credit losses	0	0
Net carrying value	379,784	591,096
Gross unrealized gains	566	5
Gross unrealized losses	(131)	(1,921)
Fair value	380,219	589,180
Held-to-maturity securities without a single maturity date	$ 380,000	$ 591,000

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