DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS - Fair value measurements of assets and liabilities on recurring basis (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Available-for-sale securities
Investment securities available-for-sale	$ 134,978	$ 128,885
Fair Value, Measurements, Recurring | Fair Value
Available-for-sale securities
Investment securities available-for-sale	134,978	128,885
Fair Value, Measurements, Recurring | Fair Value | Federal agencies
Available-for-sale securities
Investment securities available-for-sale	31,911	31,622
Fair Value, Measurements, Recurring | Fair Value | State and municipal
Available-for-sale securities
Investment securities available-for-sale	48,274	42,200
Fair Value, Measurements, Recurring | Fair Value | Government-sponsored enterprise (GSE) residential mortgage-backed and other asset-backed agency securities
Available-for-sale securities
Investment securities available-for-sale	51,498	51,741
Fair Value, Measurements, Recurring | Fair Value | Corporate
Available-for-sale securities
Investment securities available-for-sale	$ 3,295	$ 3,322
Fair Value, Measurements, Recurring | Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets (Level 1)
Available-for-sale securities
Investment securities available-for-sale
Fair Value, Measurements, Recurring | Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets (Level 1) | Federal agencies
Available-for-sale securities
Investment securities available-for-sale
Fair Value, Measurements, Recurring | Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets (Level 1) | State and municipal
Available-for-sale securities
Investment securities available-for-sale
Fair Value, Measurements, Recurring | Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets (Level 1) | Government-sponsored enterprise (GSE) residential mortgage-backed and other asset-backed agency securities
Available-for-sale securities
Investment securities available-for-sale
Fair Value, Measurements, Recurring | Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate
Available-for-sale securities
Investment securities available-for-sale
Fair Value, Measurements, Recurring | Fair Value Measurements Using Significant Other Observable Inputs (Level 2)
Available-for-sale securities
Investment securities available-for-sale	$ 133,684	$ 127,563
Fair Value, Measurements, Recurring | Fair Value Measurements Using Significant Other Observable Inputs (Level 2) | Federal agencies
Available-for-sale securities
Investment securities available-for-sale	31,911	31,622
Fair Value, Measurements, Recurring | Fair Value Measurements Using Significant Other Observable Inputs (Level 2) | State and municipal
Available-for-sale securities
Investment securities available-for-sale	48,274	42,200
Fair Value, Measurements, Recurring | Fair Value Measurements Using Significant Other Observable Inputs (Level 2) | Government-sponsored enterprise (GSE) residential mortgage-backed and other asset-backed agency securities
Available-for-sale securities
Investment securities available-for-sale	51,498	51,741
Fair Value, Measurements, Recurring | Fair Value Measurements Using Significant Other Observable Inputs (Level 2) | Corporate
Available-for-sale securities
Investment securities available-for-sale	2,001	2,000
Fair Value, Measurements, Recurring | Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Available-for-sale securities
Investment securities available-for-sale	$ 1,294	$ 1,322
Fair Value, Measurements, Recurring | Fair Value Measurements Using Significant Unobservable Inputs (Level 3) | Federal agencies
Available-for-sale securities
Investment securities available-for-sale
Fair Value, Measurements, Recurring | Fair Value Measurements Using Significant Unobservable Inputs (Level 3) | State and municipal
Available-for-sale securities
Investment securities available-for-sale
Fair Value, Measurements, Recurring | Fair Value Measurements Using Significant Unobservable Inputs (Level 3) | Government-sponsored enterprise (GSE) residential mortgage-backed and other asset-backed agency securities
Available-for-sale securities
Investment securities available-for-sale
Fair Value, Measurements, Recurring | Fair Value Measurements Using Significant Unobservable Inputs (Level 3) | Corporate
Available-for-sale securities
Investment securities available-for-sale	$ 1,294	$ 1,322