FAIR VALUE MEASUREMENTS (Schedule of Financial Instruments with Estimated Fair Values) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value Disclosure Item Amounts [Domain] | Level 1 Inputs [Member]
ASSETS:
Investment Securities, Held to Maturity (fair value of $591,751 and $612,701)	$ 441,189	$ 431,733
Other Equity Securities		0
Mortgage Servicing Rights		0
Loans, Net of Allowance for Credit Losses		0
Fair Value Disclosure Item Amounts [Domain] | Level 2 Inputs [Member]
ASSETS:
Investment Securities, Held to Maturity (fair value of $591,751 and $612,701)	150,562	180,968
Other Equity Securities		2,848
Mortgage Servicing Rights		0
Loans, Net of Allowance for Credit Losses		0
Fair Value Disclosure Item Amounts [Domain] | Level 3 Inputs [Member]
ASSETS:
Investment Securities, Held to Maturity (fair value of $591,751 and $612,701)	0	0
Other Equity Securities		0
Mortgage Servicing Rights		4,491
Loans, Net of Allowance for Credit Losses		2,377,229
Investment Securities Available for Sale	337,902	413,294
Investment Securities, Held to Maturity (fair value of $591,751 and $612,701)	625,022	660,744
Equity Securities	3,450	10
Loans Held for Sale	28,211	26,909
Mortgage Servicing Rights	831	2,599	$ 3,774	$ 3,452
LIABILITIES:
Derivative Liabilities	66,080	73,675
Level 1 Inputs [Member]
ASSETS:
Cash	83,118	72,114
Short-Term Investments	228,949	528,536
Other Equity Securities	0
Mortgage Servicing Rights	0
Loans, Net of Allowance for Credit Losses	0	0
LIABILITIES:
Deposits	0	0
Short-Term Borrowings	0	0
Subordinated Notes Payable	0	0
Long-Term Borrowings	0	0
Level 2 Inputs [Member]
ASSETS:
Cash	0	0
Short-Term Investments	0	0
Other Equity Securities	2,848
Mortgage Servicing Rights	0
Loans, Net of Allowance for Credit Losses	0	0
LIABILITIES:
Deposits	3,243,896	3,310,383
Short-Term Borrowings	35,341	56,793
Subordinated Notes Payable	44,323	45,763
Long-Term Borrowings	315	513
Level 3 Inputs [Member]
ASSETS:
Cash	0	0
Short-Term Investments	0	0
Other Equity Securities	0
Mortgage Servicing Rights	1,280
Loans, Net of Allowance for Credit Losses	2,510,529	2,377,229
LIABILITIES:
Deposits	0	0
Short-Term Borrowings	0	0
Subordinated Notes Payable	0	0
Long-Term Borrowings	0	0
Carrying Value [Member]
ASSETS:
Cash	83,118	72,114
Short-Term Investments	228,949	528,536
Investment Securities, Held to Maturity (fair value of $591,751 and $612,701)	625,022	660,774
Other Equity Securities	2,848	2,848
Mortgage Servicing Rights	831	2,599
Loans, Net of Allowance for Credit Losses	2,703,977	2,522,617
LIABILITIES:
Deposits	3,701,822	3,939,317
Short-Term Borrowings	35,341	56,793
Subordinated Notes Payable	52,887	52,887
Long-Term Borrowings	$ 315	$ 513