GOODWILL AND INTANGIBLE ASSETS - Summary of Acquired Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 191,569	$ 196,111
Accumulated Amortization	85,375	70,173
Core deposit premiums
Finite-Lived Intangible Assets [Line Items]
Gross Amount	99,032	103,574
Accumulated Amortization	63,518	58,456
Referral relationships
Finite-Lived Intangible Assets [Line Items]
Gross Amount	88,651	88,651
Accumulated Amortization	20,367	10,943
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Amount	2,734	2,734
Accumulated Amortization	1,096	612
Patent
Finite-Lived Intangible Assets [Line Items]
Gross Amount	420	420
Accumulated Amortization	42	0
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Amount	732	732
Accumulated Amortization	$ 352	$ 162