FAIR VALUE MEASUREMENT AND DISCLOSURE (Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Financial assets:
Loans held for sale	$ 13,088	$ 4,314
Available-for-sale Securities	920,083	910,692
Obligations of states and political subdivisions
Financial assets:
Available-for-sale Securities	89,129	93,752
Mortgage-backed securities issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale Securities	456,377	453,672
Collateralized mortgage obligations issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale Securities	352,071	342,894
Fair Value, Measurements, Recurring
Financial assets:
Loans held for sale	13,113	4,403
Customer loan swaps	17,143
Financial liabilities:
Junior subordinated debt interest rate swaps		5,682
Customer loan swaps	15
Fair Value, Measurements, Recurring | Obligations of states and political subdivisions
Financial assets:
Available-for-sale Securities	89,129	93,752
Fair Value, Measurements, Recurring | Mortgage-backed securities issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale Securities	456,377	453,672
Fair Value, Measurements, Recurring | Collateralized mortgage obligations issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale Securities	352,071	342,894
Fair Value, Measurements, Recurring | Corporate Bond Securities [Member]
Financial assets:
Available-for-sale Securities	22,506	20,374
Fair Value, Measurements, Recurring | Equity investments
Financial assets:
Available-for-sale Securities	830	746
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	13,113	4,403
Customer loan swaps	17,143
Financial liabilities:
Junior subordinated debt interest rate swaps		5,682
Customer loan swaps	15
Observable Market Data (Level 2) | Fair Value, Measurements, Recurring | Obligations of states and political subdivisions
Financial assets:
Available-for-sale Securities	89,129	93,752
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	456,377	453,672
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	352,071	342,894
Observable Market Data (Level 2) | Fair Value, Measurements, Recurring | Corporate Bond Securities [Member]
Financial assets:
Available-for-sale Securities	22,506	20,374
Observable Market Data (Level 2) | Fair Value, Measurements, Recurring | Equity investments
Financial assets:
Available-for-sale Securities	830	746
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	262
Interest Rate Swap On Loans [Member] | Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial liabilities:
Junior subordinated debt interest rate swaps	262
Interest Rate Lock Commitments [Member] | Fair Value, Measurements, Recurring
Financial assets:
Customer loan swaps	516	95
Financial liabilities:
Customer loan swaps	45	28
Interest Rate Lock Commitments [Member] | Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial assets:
Customer loan swaps	516	95
Financial liabilities:
Customer loan swaps	45	28
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	272	32
Financial liabilities:
Customer loan swaps		17
Forward Contracts [Member] | Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial assets:
Customer loan swaps	272	32
Financial liabilities:
Customer loan swaps		17
Interest rate swaps | Fair Value, Measurements, Recurring
Financial assets:
Customer loan swaps		7,841
Financial liabilities:
Junior subordinated debt interest rate swaps	8,306
Customer loan swaps		7,841
Interest rate swaps | Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial assets:
Customer loan swaps		7,841
Financial liabilities:
Junior subordinated debt interest rate swaps	8,306
Customer loan swaps		7,841
Forward-Starting Interest Rate Swap | Fair Value, Measurements, Recurring
Financial liabilities:
Junior subordinated debt interest rate swaps		30
Forward-Starting Interest Rate Swap | Readily Available Market Prices (Level 1) | Fair Value, Measurements, Recurring
Financial liabilities:
Junior subordinated debt interest rate swaps		0
Forward-Starting Interest Rate Swap | Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial liabilities:
Junior subordinated debt interest rate swaps		$ 30
Customer Loan Swaps | Fair Value, Measurements, Recurring
Financial liabilities:
Customer loan swaps	17,143
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	17,143
Customer Loan Swaps | Company Determined Fair Value (Level 3) | Fair Value, Measurements, Recurring
Financial liabilities:
Customer loan swaps	$ 0