FAIR VALUE MEASUREMENT (Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Financial assets:
Loans held for sale	$ 22,928	$ 10,958
Available-for-sale Securities	799,526	750,338
Customer loan swaps	15,001	3,166
Financial liabilities:
Customer loan swaps	15,001	3,166
Obligations of U.S. government-sponsored enterprises
Financial assets:
Available-for-sale Securities	5,131	5,040
Obligations of states and political subdivisions
Financial assets:
Available-for-sale Securities	10,044	17,694
Mortgage-backed securities issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale Securities	470,471	419,046
Collateralized mortgage obligations issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale Securities	307,612	306,857
Equity Securities [Member]
Financial assets:
Available-for-sale Securities	645	705
Fair Value, Measurements, Recurring
Financial assets:
Loans held for sale	22,928	10,958
Customer loan swaps	15,001	3,166
Interest Rate Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net	523	139
Financial liabilities:
Junior subordinated debt interest rate swaps		9,229
Customer loan swaps	15,001	3,166
Fair Value, Measurements, Recurring | Obligations of U.S. government-sponsored enterprises
Financial assets:
Available-for-sale Securities	5,131	5,040
Fair Value, Measurements, Recurring | Obligations of states and political subdivisions
Financial assets:
Available-for-sale Securities	10,044	17,694
Fair Value, Measurements, Recurring | Mortgage-backed securities issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale Securities	470,471	419,046
Fair Value, Measurements, Recurring | Collateralized mortgage obligations issued or guaranteed by U.S. government-sponsored enterprises
Financial assets:
Available-for-sale Securities	307,612	306,857
Fair Value, Measurements, Recurring | Corporate Bond Securities [Member]
Financial assets:
Available-for-sale Securities	5,623	996
Fair Value, Measurements, Recurring | Equity Securities [Member]
Financial assets:
Available-for-sale Securities	645	705
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	0
Readily Available Market Prices (Level 1) | Fair Value, Measurements, Recurring
Financial assets:
Loans held for sale	0	0
Interest Rate Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net	0	0
Financial liabilities:
Customer loan swaps	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	22,928	10,958
Available-for-sale Securities	799,526	750,338
Customer loan swaps	15,001	3,166
Financial liabilities:
Customer loan swaps	15,001	3,166
Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial assets:
Loans held for sale	22,928	10,958
Customer loan swaps	15,001	3,166
Interest Rate Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net	523	139
Financial liabilities:
Junior subordinated debt interest rate swaps		9,229
Customer loan swaps	15,001	3,166
Observable Market Data (Level 2) | Fair Value, Measurements, Recurring | Obligations of U.S. government-sponsored enterprises
Financial assets:
Available-for-sale Securities	5,131	5,040
Observable Market Data (Level 2) | Fair Value, Measurements, Recurring | Obligations of states and political subdivisions
Financial assets:
Available-for-sale Securities	10,044	17,694
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	470,471	419,046
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	307,612	306,857
Observable Market Data (Level 2) | Fair Value, Measurements, Recurring | Corporate Bond Securities [Member]
Financial assets:
Available-for-sale Securities	5,623	996
Observable Market Data (Level 2) | Fair Value, Measurements, Recurring | Equity Securities [Member]
Financial assets:
Available-for-sale Securities	645	705
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	0
Company Determined Fair Value (Level 3) | Fair Value, Measurements, Recurring
Financial assets:
Loans held for sale	0	0
Interest Rate Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net	0	0
Financial liabilities:
Customer loan swaps	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 swaps
Financial liabilities:
Junior subordinated debt interest rate swaps	13,265	9,229
Interest rate swaps | Fair Value, Measurements, Recurring
Financial liabilities:
Junior subordinated debt interest rate swaps	13,265
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	13,265	9,229
Interest rate swaps | Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial liabilities:
Junior subordinated debt interest rate swaps	13,265
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	1,172	576
Forward-Starting Interest Rate Swap | Fair Value, Measurements, Recurring
Financial liabilities:
Junior subordinated debt interest rate swaps	1,172	576
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	0
Forward-Starting Interest Rate Swap | Observable Market Data (Level 2)
Financial liabilities:
Junior subordinated debt interest rate swaps	1,172	576
Forward-Starting Interest Rate Swap | Observable Market Data (Level 2) | Fair Value, Measurements, Recurring
Financial liabilities:
Junior subordinated debt interest rate swaps	1,172	576
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	$ 0