FAIR VALUE DISCLOSURES, Assets (Liabilities) Measured at Fair Value on Recurring and Non-Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Securities available for sale [Abstract]
Securities available for sale	$ 606,889		$ 622,762
Mortgage servicing rights	24,573	$ 26,426	26,569	$ 27,749	$ 26,658	$ 27,474
State and Municipal [Member]
Securities available for sale [Abstract]
Securities available for sale	180,924		180,575
Residential Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	287,745		300,704
Commercial Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	42,295		41,748
Commercial Collateralized Mortgage Obligations [Member]
Securities available for sale [Abstract]
Securities available for sale	68,885		71,930
Other Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	11,185		10,765
Recurring [Member]
Securities available for sale [Abstract]
Asset-backed and other amortizing securities	15,855		17,040
Loans held for sale (mandatory)	9,490		6,615
Mortgage servicing rights	24,573		26,569
Asset derivatives	$ 13,600		$ 17,230
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other assets		Other assets
Liability derivatives	$ (102)		$ (432)
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Accrued expenses and other liabilities		Accrued expenses and other liabilities
Recurring [Member] | State and Municipal [Member]
Securities available for sale [Abstract]
Securities available for sale	$ 180,924		$ 180,575
Recurring [Member] | Residential Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	287,745		300,704
Recurring [Member] | Commercial Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	42,295		41,748
Recurring [Member] | Commercial Collateralized Mortgage Obligations [Member]
Securities available for sale [Abstract]
Securities available for sale	68,885		71,930
Recurring [Member] | Other Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	11,185		10,765
Recurring [Member] | Level 1 [Member]
Securities available for sale [Abstract]
Asset-backed and other amortizing securities	0		0
Loans held for sale (mandatory)	0		0
Mortgage servicing rights	0		0
Asset derivatives	0		0
Liability derivatives	0		0
Recurring [Member] | Level 1 [Member] | State and Municipal [Member]
Securities available for sale [Abstract]
Securities available for sale	0		0
Recurring [Member] | Level 1 [Member] | Residential Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	0		0
Recurring [Member] | Level 1 [Member] | Commercial Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	0		0
Recurring [Member] | Level 1 [Member] | Commercial Collateralized Mortgage Obligations [Member]
Securities available for sale [Abstract]
Securities available for sale	0		0
Recurring [Member] | Level 1 [Member] | Other Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	0		0
Recurring [Member] | Level 2 [Member]
Securities available for sale [Abstract]
Asset-backed and other amortizing securities	15,855		17,040
Loans held for sale (mandatory)	9,490		6,615
Mortgage servicing rights	0		0
Asset derivatives	13,600		17,230
Liability derivatives	(102)		(432)
Recurring [Member] | Level 2 [Member] | State and Municipal [Member]
Securities available for sale [Abstract]
Securities available for sale	180,924		180,575
Recurring [Member] | Level 2 [Member] | Residential Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	287,745		300,704
Recurring [Member] | Level 2 [Member] | Commercial Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	42,295		41,748
Recurring [Member] | Level 2 [Member] | Commercial Collateralized Mortgage Obligations [Member]
Securities available for sale [Abstract]
Securities available for sale	68,885		71,930
Recurring [Member] | Level 2 [Member] | Other Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	11,185		10,765
Recurring [Member] | Level 3 [Member]
Securities available for sale [Abstract]
Asset-backed and other amortizing securities	0		0
Loans held for sale (mandatory)	0		0
Mortgage servicing rights	24,573		26,569
Asset derivatives	0		0
Liability derivatives	0		0
Recurring [Member] | Level 3 [Member] | State and Municipal [Member]
Securities available for sale [Abstract]
Securities available for sale	0		0
Recurring [Member] | Level 3 [Member] | Residential Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	0		0
Recurring [Member] | Level 3 [Member] | Commercial Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	0		0
Recurring [Member] | Level 3 [Member] | Commercial Collateralized Mortgage Obligations [Member]
Securities available for sale [Abstract]
Securities available for sale	0		0
Recurring [Member] | Level 3 [Member] | Other Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	0		0
Non-recurring [Member]
Assets measured at fair value on a non-recurring basis [Abstract]
Loans held for investment	20,905		1,482
Non-recurring [Member] | Level 1 [Member]
Assets measured at fair value on a non-recurring basis [Abstract]
Loans held for investment	0		0
Non-recurring [Member] | Level 2 [Member]
Assets measured at fair value on a non-recurring basis [Abstract]
Loans held for investment	0		0
Non-recurring [Member] | Level 3 [Member]
Assets measured at fair value on a non-recurring basis [Abstract]
Loans held for investment	$ 20,905		$ 1,482