SECURITIES (Debt Securities, Held-to-Maturity, Allowance for Credit Loss) (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Beginning Balance				$ (94)
Debt Securities, Held-to-maturity, Allowance for Credit Loss	$ 104			104
New credit standard (ASC 326) - impact in year of adoption			$ 11,215
Ending Balance	104			104
U.S. Government and agency obligations
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Beginning Balance	0	$ 0	0	0	$ 0
Debt Securities, Held-to-maturity, Allowance for Credit Loss	0	0		0	0
New credit standard (ASC 326) - impact in year of adoption		0			0
Recapture of provision for credit losses	0	0		0	0
Ending Balance	0	0		0	0
Municipal bonds
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Beginning Balance	64	61	0	59	0
Debt Securities, Held-to-maturity, Allowance for Credit Loss	63	60		63	60
New credit standard (ASC 326) - impact in year of adoption		0			28
Recapture of provision for credit losses	(1)	(1)		4	32
Ending Balance	63	60		63	60
Corporate bonds
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Beginning Balance	46	41	0	35	0
Debt Securities, Held-to-maturity, Allowance for Credit Loss	41	42		41	42
New credit standard (ASC 326) - impact in year of adoption		0			35
Recapture of provision for credit losses	(5)	1		6	7
Ending Balance	41	42		41	42
Mortgage-backed or related securities
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Beginning Balance	0	0	0	0	0
Debt Securities, Held-to-maturity, Allowance for Credit Loss	0	0		0	0
New credit standard (ASC 326) - impact in year of adoption		0			0
Recapture of provision for credit losses	0	0		0	0
Ending Balance	0	0		0	0
Held-to-maturity Securities
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Beginning Balance	(110)	102	$ 0	94	0
Debt Securities, Held-to-maturity, Allowance for Credit Loss	104	102		104	102
New credit standard (ASC 326) - impact in year of adoption		0			63
Recapture of provision for credit losses	(6)	0		10	39
Ending Balance	$ 104	$ 102		$ 104	$ 102