GOODWILL, OTHER INTANGIBLE ASSETS AND MORTGAGE SERVICING RIGHTS (Mortgage Servicing Rights) (Details) - USD ($) $ in Thousands		3 Months Ended				9 Months Ended
		Sep. 30, 2023		Sep. 30, 2022		Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Servicing Asset at Amortized Value, Balance [Roll Forward]
Additions—through purchase						$ 222	$ 202
Servicing Contracts [Member]
Morgage Servicing Rights at Amortized Value [Line Items]
Loans Serviced For Others		$ 2,760,000				2,760,000		$ 2,770,000
Custodial Accounts		29,100				29,100		$ 11,200
Servicing Asset at Amortized Value, Balance [Roll Forward]
Balance, net of valuation allowance, beginning of the period		15,111		$ 17,633		16,166	17,206
Additions—amounts capitalized		638		296		1,123	3,053
Additions—through purchase		98		57
Amortization (1)		(851)	[1]	(985)	[1]	(2,525)	(3,331)
Servicing Asset at Fair Value, Other Changes in Fair Value		128		72		118	201
Balance, net of valuation allowance, end of the period	[2]	14,868		$ 16,929		14,868	$ 16,929
Valuation allowance, end of period		$ 0				$ 0

[1] Amortization of mortgage servicing rights is recorded as a reduction of loan servicing income within mortgage banking operations and any unamortized balance is fully amortized if the loan repays in full.

[2] There was no valuation allowance on mortgage servicing rights as of both September 30, 2023 and 2022.(3)    Fair value adjustments relate to SBA servicing rights. These adjustments are estimated based on an independent dealer analysis by discounting estimated net future cash flows from servicing SBA loans.