GOODWILL, OTHER INTANGIBLE ASSETS AND MORTGAGE SERVICING RIGHTS (Mortgage Servicing Rights) (Details) - USD ($) $ in Thousands		3 Months Ended				9 Months Ended
		Sep. 30, 2020		Sep. 30, 2019		Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Servicing Asset at Amortized Value, Balance [Roll Forward]
Servicing Asset at Amortized Cost, Additions, Acquisitions		$ 40		$ 36
Servicing Asset at Amortized Cost, Additions						$ 141	$ 105
Servicing Contracts [Member]
Morgage Servicing Rights at Amortized Value [Line Items]
Loans Serviced For Others		2,610,000				2,610,000		$ 2,480,000
Custodial Accounts		3,400				3,400		$ 12,000
Servicing Asset at Amortized Value, Balance [Roll Forward]
Balance, net of valuation allowance, beginning of the period		14,424		13,998		14,148	14,638
Additions—amounts capitalized		2,426		1,167		6,030	2,524
Amortization		(2,075)	[1]	(1,404)	[1]	(5,504)	(3,470)
Balance, net of valuation allowance, end of the period	[2]	14,815		$ 13,797		14,815	$ 13,797
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 as of September 30, 2020 and 2019.