GOODWILL, OTHER INTANGIBLE ASSETS AND MORTGAGE SERVICING RIGHTS (Mortgage Servicing Rights) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Serviced Loans
Servicing Assets at Amortized Value [Line Items]
Loans serviced for others	$ 2,780,000	$ 2,770,000
Mortgage Servicing Rights
Servicing Assets at Amortized Value [Line Items]
Custodial accounts	11,600	11,200
Servicing Asset at Amortized Value, Balance [Roll Forward]
Balance, beginning of the year	16,166	17,206	$ 15,223
Additions—amounts capitalized	1,590	3,200	7,260
Servicing Asset at Amortized Cost, Additions	313	285	159
Amortization	(3,325)	(4,216)	(6,580)
Valuation adjustments in the period	95	309	(1,144)
Balance, end of the year	$ 14,649	$ 16,166	$ 17,206