FAIR VALUE DISCLOSURES, Assets (Liabilities) Measured at Fair Value on Recurring and Non-Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Securities available for sale [Abstract]
Securities available for sale	$ 628,093		$ 701,711
Mortgage servicing rights	26,658	$ 25,795	27,474	$ 27,505	$ 25,425	$ 19,700
State and Municipal [Member]
Securities available for sale [Abstract]
Securities available for sale	180,395		225,055
Residential Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	310,187		328,845
Commercial Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	41,218		41,967
Collateralized Mortgage Obligations [Member]
Securities available for sale [Abstract]
Securities available for sale	67,595		75,638
Other Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	10,913		11,112
Recurring [Member]
Securities available for sale [Abstract]
Asset-backed and other amortizing securities	17,785		19,094
Loans held for sale (mandatory)	15,516		10,038
Mortgage servicing rights	26,658		27,474
Asset derivatives	20,373		21,162
Liability derivatives	(34)		(128)
Recurring [Member] | State and Municipal [Member]
Securities available for sale [Abstract]
Securities available for sale	180,395		225,055
Recurring [Member] | Residential Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	310,187		328,845
Recurring [Member] | Commercial Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	41,218		41,967
Recurring [Member] | Collateralized Mortgage Obligations [Member]
Securities available for sale [Abstract]
Securities available for sale	67,595		75,638
Recurring [Member] | Other Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	10,913		11,112
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] | 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	17,785		19,094
Loans held for sale (mandatory)	15,516		10,038
Mortgage servicing rights	0		0
Asset derivatives	20,373		21,162
Liability derivatives	(34)		(128)
Recurring [Member] | Level 2 [Member] | State and Municipal [Member]
Securities available for sale [Abstract]
Securities available for sale	180,395		225,055
Recurring [Member] | Level 2 [Member] | Residential Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	310,187		328,845
Recurring [Member] | Level 2 [Member] | Commercial Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	41,218		41,967
Recurring [Member] | Level 2 [Member] | Collateralized Mortgage Obligations [Member]
Securities available for sale [Abstract]
Securities available for sale	67,595		75,638
Recurring [Member] | Level 2 [Member] | Other Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	10,913		11,112
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	26,658		27,474
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] | 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	18,098		4,821
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	$ 18,098		$ 4,821