INVESTMENTS - Schedule of Cost or Amortized Cost and Fair Value of Securities Available for Sale (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,449,624	$ 1,353,532
Allowance for Expected Credit Losses	(827)	(1,018)	$ (566)
Gross Unrealized Gains	7,688	2,679
Gross Unrealized Losses	(61,456)	(86,114)
Fair Value	1,395,029	1,269,079
U.S. government obligations and agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	24,327	20,284
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	166	35
Gross Unrealized Losses	(304)	(572)
Fair Value	24,189	19,747
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	980,061	920,337
Allowance for Expected Credit Losses	(712)	(894)
Gross Unrealized Gains	5,251	1,580
Gross Unrealized Losses	(34,947)	(52,075)
Fair Value	949,653	868,948
Mortgage-backed and asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	419,884	387,538
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	2,226	1,041
Gross Unrealized Losses	(24,838)	(31,549)
Fair Value	397,272	357,030
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	15,872	15,893
Allowance for Expected Credit Losses	(1)	(3)
Gross Unrealized Gains	4	0
Gross Unrealized Losses	(1,106)	(1,536)
Fair Value	14,769	14,354
Redeemable preferred stock
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	9,480	9,480
Allowance for Expected Credit Losses	(114)	(121)	$ (93)
Gross Unrealized Gains	41	23
Gross Unrealized Losses	(261)	(382)
Fair Value	$ 9,146	$ 9,000

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) 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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Amortized cost of 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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