GOODWILL AND OTHER INTANGIBLE ASSETS - Gross Carrying Amounts and Accumulated Amortization of Intangible Assets and Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 42,944	$ 42,944
Accumulated Amortization	(23,089)	(17,024)
Net Carrying Amount	19,855	25,920
Goodwill, gross	363,436	370,223
Goodwill	363,436	370,223	$ 370,223
Core deposit intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	29,038	29,038
Accumulated Amortization	(16,694)	(12,624)
Net Carrying Amount	$ 12,344	$ 16,414
Core deposit intangibles | Weighted Average
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	6 years 6 months	7 years 4 months 24 days
Other identifiable intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 13,906	$ 13,906
Accumulated Amortization	(6,395)	(4,400)
Net Carrying Amount	$ 7,511	$ 9,506
Other identifiable intangibles | Weighted Average
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	8 years 9 months 18 days	9 years 8 months 12 days