FAIR VALUE MEASUREMENT AND DISCLOSURE (Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Financial assets:
Trading securities	$ 3,971	$ 3,990
Available-for-sale securities, at fair value (amortized cost of $777,621 and $796,960, respectively)	686,423	695,875
Loans held for sale	4,539	5,259
Financial liabilities:
Debt Securities, Trading	3,971	3,990
Obligations of states and political subdivisions
Financial assets:
Available-for-sale securities, at fair value (amortized cost of $777,621 and $796,960, respectively)	49,051	49,226
MBS issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale securities, at fair value (amortized cost of $777,621 and $796,960, respectively)	507,831	514,019
CMO issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale securities, at fair value (amortized cost of $777,621 and $796,960, respectively)	106,233	109,347
Fair Value, Measurements, Recurring
Financial assets:
Trading securities	3,971	3,990
Loans held for sale	4,562	5,197
Financial liabilities:
Debt Securities, Trading	3,971	3,990
Fair Value, Measurements, Recurring | Obligations of states and political subdivisions
Financial assets:
Available-for-sale securities, at fair value (amortized cost of $777,621 and $796,960, respectively)	49,051	49,226
Fair Value, Measurements, Recurring | MBS issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale securities, at fair value (amortized cost of $777,621 and $796,960, respectively)	507,831	514,019
Fair Value, Measurements, Recurring | CMO issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale securities, at fair value (amortized cost of $777,621 and $796,960, respectively)	106,233	109,347
Fair Value, Measurements, Recurring | Corporate Bond Securities [Member]
Financial assets:
Available-for-sale securities, at fair value (amortized cost of $777,621 and $796,960, respectively)	23,308	23,283
Readily Available Market Prices (Level 1) | Fair Value, Measurements, Recurring
Financial assets:
Trading securities	3,971	3,990
Loans held for sale	0	0
Financial liabilities:
Debt Securities, Trading	3,971	3,990
Readily Available Market Prices (Level 1) | Fair Value, Measurements, Recurring | Obligations of states and political subdivisions
Financial assets:
Available-for-sale securities, at fair value (amortized cost of $777,621 and $796,960, respectively)	0	0
Readily Available Market Prices (Level 1) | Fair Value, Measurements, Recurring | MBS issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale securities, at fair value (amortized cost of $777,621 and $796,960, respectively)	0	0
Readily Available Market Prices (Level 1) | Fair Value, Measurements, Recurring | CMO issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale securities, at fair value (amortized cost of $777,621 and $796,960, respectively)	0	0
Readily Available Market Prices (Level 1) | Fair Value, Measurements, Recurring | Corporate Bond Securities [Member]
Financial assets:
Available-for-sale securities, at fair value (amortized cost of $777,621 and $796,960, respectively)	0	0
Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial assets:
Trading securities	0	0
Loans held for sale	4,562	5,197
Financial liabilities:
Debt Securities, Trading	0	0
Observable Market Data (Level 2) | Fair Value, Measurements, Recurring | Obligations of states and political subdivisions
Financial assets:
Available-for-sale securities, at fair value (amortized cost of $777,621 and $796,960, respectively)	49,051	49,226
Observable Market Data (Level 2) | Fair Value, Measurements, Recurring | MBS issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale securities, at fair value (amortized cost of $777,621 and $796,960, respectively)	507,831	514,019
Observable Market Data (Level 2) | Fair Value, Measurements, Recurring | CMO issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale securities, at fair value (amortized cost of $777,621 and $796,960, respectively)	106,233	109,347
Observable Market Data (Level 2) | Fair Value, Measurements, Recurring | Corporate Bond Securities [Member]
Financial assets:
Available-for-sale securities, at fair value (amortized cost of $777,621 and $796,960, respectively)	23,308	23,283
Company Determined Fair Value (Level 3) | Fair Value, Measurements, Recurring
Financial assets:
Trading securities	0	0
Loans held for sale	0	0
Financial liabilities:
Debt Securities, Trading	0	0
Company Determined Fair Value (Level 3) | Fair Value, Measurements, Recurring | Obligations of states and political subdivisions
Financial assets:
Available-for-sale securities, at fair value (amortized cost of $777,621 and $796,960, respectively)	0	0
Company Determined Fair Value (Level 3) | Fair Value, Measurements, Recurring | MBS issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale securities, at fair value (amortized cost of $777,621 and $796,960, respectively)	0	0
Company Determined Fair Value (Level 3) | Fair Value, Measurements, Recurring | CMO issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale securities, at fair value (amortized cost of $777,621 and $796,960, respectively)	0	0
Company Determined Fair Value (Level 3) | Fair Value, Measurements, Recurring | Corporate Bond Securities [Member]
Financial assets:
Available-for-sale securities, at fair value (amortized cost of $777,621 and $796,960, respectively)	0	0
Interest Rate Lock Commitments [Member] | Fair Value, Measurements, Recurring
Financial assets:
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	71	31
Financial liabilities:
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	43	87
Interest Rate Lock Commitments [Member] | Readily Available Market Prices (Level 1) | Fair Value, Measurements, Recurring
Financial assets:
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	0	0
Financial liabilities:
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value		0
Interest Rate Lock Commitments [Member] | Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial assets:
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	71	31
Financial liabilities:
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	43	87
Interest Rate Lock Commitments [Member] | Company Determined Fair Value (Level 3) | Fair Value, Measurements, Recurring
Financial assets:
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	0	0
Financial liabilities:
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	0	0
Forward delivery commitments | Fair Value, Measurements, Recurring
Financial assets:
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	32	114
Financial liabilities:
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	14
Forward delivery commitments | Readily Available Market Prices (Level 1) | Fair Value, Measurements, Recurring
Financial assets:
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	0	0
Forward delivery commitments | Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial assets:
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	32	114
Financial liabilities:
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	14
Forward delivery commitments | Company Determined Fair Value (Level 3) | Fair Value, Measurements, Recurring
Financial assets:
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	0	0
Financial liabilities:
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	0
Customer loan swaps | Fair Value, Measurements, Recurring
Financial assets:
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	11,479	14,802
Financial liabilities:
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	11,554	14,850
Customer loan swaps | Readily Available Market Prices (Level 1) | Fair Value, Measurements, Recurring
Financial assets:
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	0	0
Financial liabilities:
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	0	0
Customer loan swaps | Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial assets:
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	11,479	14,802
Financial liabilities:
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	11,554	14,850
Customer loan swaps | Company Determined Fair Value (Level 3) | Fair Value, Measurements, Recurring
Financial assets:
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	0	0
Financial liabilities:
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	0	0
Interest rate contracts
Financial assets:
Fair Value	10,996	13,051
Financial liabilities:
Derivative Liability	6,859	5,515
Interest rate contracts | Fair Value, Measurements, Recurring
Financial assets:
Fair Value	10,996	13,051
Financial liabilities:
Derivative Liability	6,859	5,515
Interest rate contracts | Readily Available Market Prices (Level 1) | Fair Value, Measurements, Recurring
Financial assets:
Fair Value	0	0
Financial liabilities:
Derivative Liability		0
Interest rate contracts | Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial assets:
Fair Value	10,996	13,051
Financial liabilities:
Derivative Liability	6,859	5,515
Interest rate contracts | Company Determined Fair Value (Level 3) | Fair Value, Measurements, Recurring
Financial assets:
Fair Value	0	0
Financial liabilities:
Derivative Liability	$ 0	$ 0