REVENUE (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Non-interest income (in-scope of Topic 606)									$ 42,752	$ 40,874	$ 46,103
Non-interest income (out-of-scope of Topic 606)									30	28,063	97,145
Total non-interest income	$ (8,383)	$ 17,465	$ 17,094	$ 16,606	$ 15,654	$ 16,251	$ 16,351	$ 20,681	42,782	68,937	143,248
Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Non-interest income (in-scope of Topic 606)									24,160	22,396	20,249
Wealth management fees
Disaggregation of Revenue [Line Items]
Non-interest income (in-scope of Topic 606)									10,197	10,008	10,530
Interchange income
Disaggregation of Revenue [Line Items]
Non-interest income (in-scope of Topic 606)									8,395	8,470	8,321
Insurance commissions and fees
Disaggregation of Revenue [Line Items]
Non-interest income (in-scope of Topic 606)									$ 0	$ 0	$ 7,003