GOODWILL AND OTHER INTANGIBLE ASSETS--Schedule of Other Intangibles (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 151,186	$ 150,626
Finite-Lived Intangible Assets, Accumulated Amortization	(74,184)	(71,335)
Servicing Asset	27,889	27,217
Core deposits
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	41,750	41,750
Finite-Lived Intangible Assets, Accumulated Amortization	(33,028)	(32,302)
Customer lists
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	72,278	72,278
Finite-Lived Intangible Assets, Accumulated Amortization	(28,399)	(26,822)
Other
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	9,269	9,381
Finite-Lived Intangible Assets, Accumulated Amortization	(3,396)	(3,416)
Servicing Contracts
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	$ (9,361)	$ (8,795)