GOODWILL AND INTANGIBLE ASSETS - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	$ 125,695	$ 115,763
Accumulated Amortization	(58,655)	(41,360)
Net Intangible Assets		74,403
Indefinite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	187,250
Accumulated Amortization	(58,655)	(41,360)
Net Intangible Assets	$ 128,595	$ 74,403
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration]	Noninterest expenses	Noninterest expenses
Trade Names
Indefinite-Lived Intangible Assets [Line Items]
Indefinite-lived trademark	$ 2,900
Core deposits
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	104,751	$ 93,811
Accumulated Amortization	(40,443)	(30,103)
Net Intangible Assets	$ 64,308	$ 63,708
Amortization Period	10 years	10 years
Indefinite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (40,443)	$ (30,103)
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	68,281	15,281
Accumulated Amortization	(12,937)	(7,876)
Net Intangible Assets	55,344	7,405
Indefinite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (12,937)	$ (7,876)
Customer relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortization Period	7 years	7 years
Customer relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortization Period	15 years	15 years
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	$ 200
Accumulated Amortization	(200)
Net Intangible Assets	$ 0
Amortization Period	1 year
Indefinite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (200)
Loan servicing rights
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	11,118	$ 6,671
Accumulated Amortization	(5,075)	(3,381)
Net Intangible Assets	6,043	3,290
Impairment losses (reversals)	300	(300)
Indefinite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (5,075)	$ (3,381)
Loan servicing rights | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortization Period	10 years	10 years
Loan servicing rights | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortization Period	25 years	25 years