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GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Changes in Carrying Amount of Goodwill and Intangibles (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Goodwill
Balance, beginning	$ 497,318	$ 497,318	$ 497,260
Goodwill true-up			58
Balance, ending	497,318	497,318	497,318
Intangible Assets
Balance, beginning	92,546
Amortization	(21,580)	(24,220)	(26,883)
Balance, ending	71,018	92,546
Core Deposit Intangibles
Intangible Assets
Balance, beginning	92,546	116,712	143,525
Amortization	(21,528)	(24,166)	(26,813)
Balance, ending	71,018	92,546	116,712
Servicing Assets
Intangible Assets
Balance, beginning	146	212	309
Amortization	(52)	(54)	(70)
Decrease due to payoff of serviced loans	(24)	(12)	(27)
Balance, ending	$ 70	$ 146	$ 212

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