FAIR VALUE MEASUREMENT AND DISCLOSURE (Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financial assets:
Loans held for sale	$ 12,997	$ 14,836
Available-for-sale Securities	797,251	779,867
Customer loan swaps	3,482	1,945
Financial liabilities:
Customer loan swaps		1,945
Obligations of states and political subdivisions
Financial assets:
Available-for-sale Securities	7,365	9,001
Mortgage-backed securities issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale Securities	521,104	480,622
Collateralized mortgage obligations issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale Securities	262,390	283,890
Equity Securities [Member]
Financial assets:
Available-for-sale Securities	741	741
Fair Value, Measurements, Recurring
Financial assets:
Loans held for sale	12,997	14,836
Customer loan swaps	3,482
Financial liabilities:
Junior subordinated debt interest rate swaps		8,372
Customer loan swaps	19
Fair Value, Measurements, Recurring | Obligations of states and political subdivisions
Financial assets:
Available-for-sale Securities	7,365	9,001
Fair Value, Measurements, Recurring | Mortgage-backed securities issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale Securities	521,104	480,622
Fair Value, Measurements, Recurring | Collateralized mortgage obligations issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale Securities	262,390	283,890
Fair Value, Measurements, Recurring | Corporate Bond Securities [Member]
Financial assets:
Available-for-sale Securities	5,651	5,613
Fair Value, Measurements, Recurring | Equity Securities [Member]
Financial assets:
Available-for-sale Securities	741	741
Readily Available Market Prices (Level 1)
Financial assets:
Loans held for sale	0	0
Available-for-sale Securities	0	0
Customer loan swaps	0	0
Financial liabilities:
Customer loan swaps		0
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 Securities [Member]
Financial assets:
Available-for-sale Securities	0	0
Observable Market Data (Level 2)
Financial assets:
Loans held for sale	12,997	14,836
Available-for-sale Securities	797,251	779,867
Customer loan swaps	3,482	1,945
Financial liabilities:
Customer loan swaps		1,945
Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial assets:
Loans held for sale	12,997	14,836
Customer loan swaps	3,482
Financial liabilities:
Junior subordinated debt interest rate swaps		8,372
Customer loan swaps	19
Observable Market Data (Level 2) | Fair Value, Measurements, Recurring | Obligations of states and political subdivisions
Financial assets:
Available-for-sale Securities	7,365	9,001
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	521,104	480,622
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	262,390	283,890
Observable Market Data (Level 2) | Fair Value, Measurements, Recurring | Corporate Bond Securities [Member]
Financial assets:
Available-for-sale Securities	5,651	5,613
Observable Market Data (Level 2) | Fair Value, Measurements, Recurring | Equity Securities [Member]
Financial assets:
Available-for-sale Securities	741	741
Company Determined Fair Value (Level 3)
Financial assets:
Loans held for sale	0	0
Available-for-sale Securities	0	0
Customer loan swaps	0	0
Financial liabilities:
Customer loan swaps		0
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 Securities [Member]
Financial assets:
Available-for-sale Securities	0	0
Interest Rate Lock Commitments [Member]
Financial assets:
Customer loan swaps		202
Financial liabilities:
Customer loan swaps	25	15
Interest Rate Lock Commitments [Member] | Fair Value, Measurements, Recurring
Financial assets:
Customer loan swaps	495	202
Financial liabilities:
Customer loan swaps	25	15
Interest Rate Lock Commitments [Member] | Readily Available Market Prices (Level 1)
Financial assets:
Customer loan swaps		0
Financial liabilities:
Customer loan swaps	0	0
Interest Rate Lock Commitments [Member] | Observable Market Data (Level 2)
Financial assets:
Customer loan swaps		202
Financial liabilities:
Customer loan swaps	25	15
Interest Rate Lock Commitments [Member] | Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial assets:
Customer loan swaps	495	202
Financial liabilities:
Customer loan swaps	25	15
Interest Rate Lock Commitments [Member] | Company Determined Fair Value (Level 3)
Financial assets:
Customer loan swaps		0
Financial liabilities:
Customer loan swaps	0	0
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]
Financial assets:
Customer loan swaps	332	587
Financial liabilities:
Customer loan swaps	19	309
Forward Contracts [Member] | Fair Value, Measurements, Recurring
Financial assets:
Customer loan swaps	332	587
Financial liabilities:
Customer loan swaps		309
Forward Contracts [Member] | Readily Available Market Prices (Level 1)
Financial assets:
Customer loan swaps	0	0
Financial liabilities:
Customer loan swaps	0	0
Forward Contracts [Member] | Observable Market Data (Level 2)
Financial assets:
Customer loan swaps	332	587
Financial liabilities:
Customer loan swaps	19	309
Forward Contracts [Member] | Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial assets:
Customer loan swaps	332	587
Financial liabilities:
Customer loan swaps		309
Forward Contracts [Member] | Company Determined Fair Value (Level 3)
Financial assets:
Customer loan swaps	0	0
Financial liabilities:
Customer loan swaps	0	0
Interest rate swaps
Financial liabilities:
Junior subordinated debt interest rate swaps	8,123	8,372
Interest rate swaps | Fair Value, Measurements, Recurring
Financial assets:
Customer loan swaps		1,945
Financial liabilities:
Junior subordinated debt interest rate swaps	8,123
Customer loan swaps		1,945
Interest rate swaps | Readily Available Market Prices (Level 1)
Financial liabilities:
Junior subordinated debt interest rate swaps	0	0
Interest rate swaps | Observable Market Data (Level 2)
Financial liabilities:
Junior subordinated debt interest rate swaps	8,123	8,372
Interest rate swaps | Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial assets:
Customer loan swaps		1,945
Financial liabilities:
Junior subordinated debt interest rate swaps	8,123
Customer loan swaps		1,945
Interest rate swaps | Company Determined Fair Value (Level 3)
Financial liabilities:
Junior subordinated debt interest rate swaps	0	0
Forward-Starting Interest Rate Swap
Financial liabilities:
Junior subordinated debt interest rate swaps	98	389
Forward-Starting Interest Rate Swap | Fair Value, Measurements, Recurring
Financial liabilities:
Junior subordinated debt interest rate swaps	98	389
Forward-Starting Interest Rate Swap | Readily Available Market Prices (Level 1)
Financial liabilities:
Junior subordinated debt interest rate swaps	0	0
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)
Financial liabilities:
Junior subordinated debt interest rate swaps	98	389
Forward-Starting Interest Rate Swap | Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial liabilities:
Junior subordinated debt interest rate swaps	98	389
Forward-Starting Interest Rate Swap | Company Determined Fair Value (Level 3)
Financial liabilities:
Junior subordinated debt interest rate swaps	0	$ 0
Forward-Starting Interest Rate Swap | Company Determined Fair Value (Level 3) | Fair Value, Measurements, Recurring
Financial liabilities:
Junior subordinated debt interest rate swaps	0
Customer Loan Swaps
Financial liabilities:
Customer loan swaps	3,482
Customer Loan Swaps | Fair Value, Measurements, Recurring
Financial liabilities:
Customer loan swaps	3,482
Customer Loan Swaps | Readily Available Market Prices (Level 1)
Financial liabilities:
Customer loan swaps	0
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)
Financial liabilities:
Customer loan swaps	3,482
Customer Loan Swaps | Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial liabilities:
Customer loan swaps	3,482
Customer Loan Swaps | Company Determined Fair Value (Level 3)
Financial liabilities:
Customer loan swaps	0
Customer Loan Swaps | Company Determined Fair Value (Level 3) | Fair Value, Measurements, Recurring
Financial liabilities:
Customer loan swaps	$ 0