INCOME TAXES - Schedule of the Deferred Tax Assets and Liabilities (Details) - USD ($)	Dec. 31, 2025	Dec. 31, 2024
Deferred tax assets:
ACL	$ 70,282,000	$ 23,685,000
Unrealized loss on cash flow hedge	2,744,000	7,256,000
Unrealized losses on securities available for sale, net	43,634,000	61,479,000
Unrealized losses on securities held to maturity	6,335,000	8,068,000
Stock-based compensation	8,089,000	6,431,000
Purchase accounting adjustments	3,695,000	2,076,000
Accrued vacation	713,000	493,000
Lease liabilities	8,016,000	2,951,000
Employee costs	12,359,000	5,725,000
Tax credits	2,873,000	0
State net operating loss carryovers	712,000	0
Other	1,931,000	0
Deferred tax assets before valuation allowances	161,383,000	118,164,000
Valuation allowances	(712,000)	0
Total deferred tax assets	160,671,000	118,164,000
Deferred tax liabilities:
Basis in premises and equipment	(6,716,000)	(2,419,000)
Affordable housing partnerships and other investments	(8,920,000)	(8,011,000)
Purchase accounting adjustments	(927,000)	(1,022,000)
Mortgage servicing assets	(872,000)	(745,000)
Basis in core deposit, customer intangible assets, and asset purchase goodwill	(20,427,000)	(3,325,000)
Deferred loan origination costs	(1,836,000)	(3,317,000)
Right of use assets	(7,427,000)	(2,835,000)
Unrealized gain on equity securities	(1,268,000)	(172,000)
Other	(900,000)	(856,000)
Total deferred tax liabilities	(49,293,000)	(22,702,000)
Net deferred tax asset	$ 111,378,000	$ 95,462,000