GOODWILL AND OTHER INTANGIBLE ASSETS--Schedule of Other Intangibles (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 149,917	$ 146,064
Finite-Lived Intangible Assets, Accumulated Amortization	(68,370)	(62,115)
Servicing Asset	26,508	23,791
Core deposits
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	41,750	41,750
Finite-Lived Intangible Assets, Accumulated Amortization	(31,575)	(29,395)
Customer lists
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	72,278	69,563
Finite-Lived Intangible Assets, Accumulated Amortization	(25,246)	(20,553)
Other
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	9,381	10,960
Finite-Lived Intangible Assets, Accumulated Amortization	(3,284)	(5,477)
Servicing Contracts
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	$ (8,265)	$ (6,690)