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COMMITMENTS AND CONTINGENCIES - Legal Contingencies (Details) - USD ($) $ in Thousands				3 Months Ended
	Aug. 16, 2023	May 15, 2023	Feb. 20, 2023	Jun. 30, 2023	Dec. 31, 2022	Dec. 31, 2023	Jan. 01, 2023	Dec. 31, 2021	Dec. 31, 2020
Litigation
Allowance for Credit Losses					$ 25,333	$ 40,048	$ 25,333	$ 23,936	$ 31,838
Allowance for credit losses on unfunded commitments
Litigation
Allowance for Credit Losses						3,800	$ 0
TGC Cases
Litigation
Settlement amount	$ 13,000		$ 13,000
Accrual recorded					13,000
Insurance recovery receivable					7,400
Net settlement amount included in other noninterest expense					5,600
DeBaere and Miller cases
Litigation
Settlement amount		$ 3,400
Accrual recorded					2,600
Accrual included in other noninterest expense				$ 800	$ 2,600
John Pickett Cases
Litigation
Accrual recorded						$ 200