SECURITIES - Amortized cost and estimated fair values of investments in securities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Available-for-sale Securities [Abstract]
Amortized cost	$ 217,344	$ 207,361
Fair Value	217,627	205,944
Held-to-maturity Securities [Abstract]
Amortized cost	33	34
Fair Value	36	37
Securities Available for Sale
Available-for-sale Securities [Abstract]
Amortized cost	217,344	207,361
Unrealized Gains	1,669	1,244
Unrealized Losses	(1,386)	(2,661)
Fair Value	217,627	205,944
Securities Available for Sale \| State and municipal securities
Available-for-sale Securities [Abstract]
Amortized cost	59,607	58,991
Unrealized Gains	1,036	638
Unrealized Losses	(214)	(650)
Fair Value	60,429	58,979
Securities Available for Sale \| Debt securities
Available-for-sale Securities [Abstract]
Amortized cost	18,796	20,795
Unrealized Losses	(269)	(454)
Fair Value	18,527	20,341
Securities Available for Sale \| Collateralized mortgage obligations
Available-for-sale Securities [Abstract]
Amortized cost	51,782	34,005
Unrealized Gains	142	90
Unrealized Losses	(216)	(325)
Fair Value	51,708	33,770
Securities Available for Sale \| Mortgage-backed securities
Available-for-sale Securities [Abstract]
Amortized cost	86,061	92,489
Unrealized Gains	491	516
Unrealized Losses	(677)	(1,215)
Fair Value	85,875	91,790
Securities Available for Sale \| Other securities
Available-for-sale Securities [Abstract]
Amortized cost	1,098	1,081
Unrealized Losses	(10)	(17)
Fair Value	1,088	1,064
Securities Held to Maturity \| Collateralized mortgage obligations
Held-to-maturity Securities [Abstract]
Amortized cost	33
Gross Unrealized Gains	3
Fair Value	$ 36
Securities Held to Maturity \| Mortgage-backed securities
Held-to-maturity Securities [Abstract]
Amortized cost		34
Gross Unrealized Gains		3
Fair Value		$ 37

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
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Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

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Amount of accumulated unrealized gain on investments in debt securities classified as held-to-maturity.

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Fair value of investments in debt securities classified as held-to-maturity.

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