FAIR VALUE MEASUREMENT AND DISCLOSURE (Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financial assets:
Loans held for sale	$ 35,909	$ 11,915
Available-for-sale Securities	1,047,663	918,118
Obligations of states and political subdivisions
Financial assets:
Available-for-sale Securities	127,127	118,083
Mortgage-backed securities issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale Securities	536,225	463,386
Collateralized mortgage obligations issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale Securities	373,532	325,905
Fair Value, Measurements, Recurring
Financial assets:
Loans held for sale	36,590	11,854
Customer loan swaps	47,338
Financial liabilities:
Junior subordinated debt interest rate swaps		8,187
Customer loan swaps	218
Fair Value, Measurements, Recurring | Obligations of states and political subdivisions
Financial assets:
Available-for-sale Securities	127,127	118,083
Fair Value, Measurements, Recurring | Mortgage-backed securities issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale Securities	536,225	463,386
Fair Value, Measurements, Recurring | Collateralized mortgage obligations issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale Securities	373,532	325,905
Fair Value, Measurements, Recurring | Corporate Bond Securities [Member]
Financial assets:
Available-for-sale Securities	10,779	10,744
Fair Value, Measurements, Recurring | Equity investments
Financial assets:
Available-for-sale Securities	1,674	1,674
Readily Available Market Prices (Level 1) | Fair Value, Measurements, Recurring
Financial assets:
Loans held for sale	0	0
Readily Available Market Prices (Level 1) | Fair Value, Measurements, Recurring | Corporate Bond Securities [Member]
Financial assets:
Available-for-sale Securities	0	0
Readily Available Market Prices (Level 1) | Fair Value, Measurements, Recurring | Equity investments
Financial assets:
Available-for-sale Securities	0	0
Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial assets:
Loans held for sale	36,590	11,854
Customer loan swaps	47,338
Financial liabilities:
Junior subordinated debt interest rate swaps		8,187
Customer loan swaps	218
Observable Market Data (Level 2) | Fair Value, Measurements, Recurring | Obligations of states and political subdivisions
Financial assets:
Available-for-sale Securities	127,127	118,083
Observable Market Data (Level 2) | Fair Value, Measurements, Recurring | Mortgage-backed securities issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale Securities	536,225	463,386
Observable Market Data (Level 2) | Fair Value, Measurements, Recurring | Collateralized mortgage obligations issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale Securities	373,532	325,905
Observable Market Data (Level 2) | Fair Value, Measurements, Recurring | Corporate Bond Securities [Member]
Financial assets:
Available-for-sale Securities	10,779	10,744
Observable Market Data (Level 2) | Fair Value, Measurements, Recurring | Equity investments
Financial assets:
Available-for-sale Securities	1,674	1,674
Company Determined Fair Value (Level 3) | Fair Value, Measurements, Recurring
Financial assets:
Loans held for sale	0	0
Company Determined Fair Value (Level 3) | Fair Value, Measurements, Recurring | Corporate Bond Securities [Member]
Financial assets:
Available-for-sale Securities	0	0
Company Determined Fair Value (Level 3) | Fair Value, Measurements, Recurring | Equity investments
Financial assets:
Available-for-sale Securities	0	0
Interest Rate Swap On Loans [Member] | Fair Value, Measurements, Recurring
Financial liabilities:
Junior subordinated debt interest rate swaps	6,109	483
Interest Rate Swap On Loans [Member] | Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial liabilities:
Junior subordinated debt interest rate swaps	6,109	483
Interest Rate Lock Commitments [Member] | Fair Value, Measurements, Recurring
Financial assets:
Customer loan swaps	1,287	480
Financial liabilities:
Customer loan swaps	329	18
Interest Rate Lock Commitments [Member] | Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial assets:
Customer loan swaps	1,287	480
Financial liabilities:
Customer loan swaps	329	18
Interest Rate Lock Commitments [Member] | Company Determined Fair Value (Level 3) | Fair Value, Measurements, Recurring
Financial liabilities:
Customer loan swaps	0	0
Forward Contracts [Member] | Fair Value, Measurements, Recurring
Financial assets:
Customer loan swaps	359	312
Financial liabilities:
Customer loan swaps		15
Forward Contracts [Member] | Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial assets:
Customer loan swaps	359	312
Financial liabilities:
Customer loan swaps		15
Interest rate swaps | Fair Value, Measurements, Recurring
Financial assets:
Customer loan swaps		17,756
Financial liabilities:
Junior subordinated debt interest rate swaps	12,584
Customer loan swaps		17,756
Interest rate swaps | Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial assets:
Customer loan swaps		17,756
Financial liabilities:
Junior subordinated debt interest rate swaps	12,584
Customer loan swaps		$ 17,756
Customer Loan Swaps | Fair Value, Measurements, Recurring
Financial liabilities:
Customer loan swaps	47,338
Customer Loan Swaps | Readily Available Market Prices (Level 1) | Fair Value, Measurements, Recurring
Financial liabilities:
Customer loan swaps	0
Customer Loan Swaps | Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial liabilities:
Customer loan swaps	47,338
Customer Loan Swaps | Company Determined Fair Value (Level 3) | Fair Value, Measurements, Recurring
Financial liabilities:
Customer loan swaps	0
Interest Rate Swap On Borrowings
Financial liabilities:
Junior subordinated debt interest rate swaps	2,123
Interest Rate Swap On Borrowings | Fair Value, Measurements, Recurring
Financial liabilities:
Junior subordinated debt interest rate swaps	2,123
Interest Rate Swap On Borrowings | Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial liabilities:
Junior subordinated debt interest rate swaps	$ 2,123