GOODWILL AND OTHER INTANGIBLE ASSETS--Schedule of Other Intangibles (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 144,503	$ 146,739
Finite-Lived Intangible Assets, Accumulated Amortization	(55,841)	(52,820)
Servicing Asset	22,230	21,347
Core deposits
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	41,750	41,750
Finite-Lived Intangible Assets, Accumulated Amortization	(27,941)	(26,488)
Customer lists
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	69,563	69,563
Finite-Lived Intangible Assets, Accumulated Amortization	(17,506)	(14,457)
Other
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	10,960	14,079
Finite-Lived Intangible Assets, Accumulated Amortization	(4,668)	(7,064)
Servicing Contracts
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	$ (5,726)	$ (4,811)