IMPAIRED LOANS AND ALLOWANCE FOR LOAN LOSSES - Company's Recorded Investments in Impaired Loans and the Related Valuation Allowances (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Recorded Investment
Total	$ 29,982		$ 29,982		$ 32,718
Unpaid Principal Balance
Total	36,083		36,083		39,157
Related Valuation Allowance
Total	2,070		2,070		2,454
Average Recorded Investment
Total	30,251	$ 30,759	31,205	$ 31,662
Interest Income Recognized
Total	368	352	1,106	1,073
Construction and Land Development [Member]
Recorded Investment
Impaired Loans with No Related Allowance Recorded	397		397		226
Impaired Loans with an Allowance Recorded	289		289		51
Total	686		686		277
Unpaid Principal Balance
Impaired Loans with No Related Allowance Recorded	702		702		321
Impaired Loans with an Allowance Recorded	355		355		51
Total	1,057		1,057		372
Related Valuation Allowance
Impaired Loans with No Related Allowance Recorded	0		0		0
Impaired Loans with an Allowance Recorded	91		91		0
Total	91		91		0
Commercial Real Estate [Member]
Recorded Investment
Impaired Loans with No Related Allowance Recorded	3,431		3,431		3,267
Impaired Loans with an Allowance Recorded	4,931		4,931		6,937
Total	8,362		8,362		10,204
Unpaid Principal Balance
Impaired Loans with No Related Allowance Recorded	4,811		4,811		4,813
Impaired Loans with an Allowance Recorded	4,939		4,939		6,949
Total	9,750		9,750		11,762
Related Valuation Allowance
Impaired Loans with No Related Allowance Recorded	0		0		0
Impaired Loans with an Allowance Recorded	222		222		395
Total	222		222		395
Average Recorded Investment
Total	7,957	8,002	8,622	8,689
Interest Income Recognized
Total	131	95	317	290
Residential Real Estate [Member]
Recorded Investment
Impaired Loans with No Related Allowance Recorded	10,598		10,598		9,706
Impaired Loans with an Allowance Recorded	8,773		8,773		12,332
Total	19,371		19,371		22,038
Unpaid Principal Balance
Impaired Loans with No Related Allowance Recorded	15,283		15,283		14,136
Impaired Loans with an Allowance Recorded	8,970		8,970		12,681
Total	24,253		24,253		26,817
Related Valuation Allowance
Impaired Loans with No Related Allowance Recorded	0		0		0
Impaired Loans with an Allowance Recorded	1,188		1,188		2,059
Total	1,188		1,188		2,059
Average Recorded Investment
Total	20,097	21,384	20,962	21,542
Interest Income Recognized
Total	213	$ 240	707	$ 728
Commercial And Financial [Member]
Recorded Investment
Impaired Loans with No Related Allowance Recorded	29		29		199
Impaired Loans with an Allowance Recorded	1,127		1,127		0
Total	1,156		1,156		199
Unpaid Principal Balance
Impaired Loans with No Related Allowance Recorded	39		39		206
Impaired Loans with an Allowance Recorded	501		501		0
Total	540		540		206
Related Valuation Allowance
Impaired Loans with No Related Allowance Recorded	0		0		0
Impaired Loans with an Allowance Recorded	521		521		0
Total	521		521		0
Consumer [Member]
Recorded Investment
Impaired Loans with No Related Allowance Recorded	117		117		0
Impaired Loans with an Allowance Recorded	290		290		0
Total	407		407		0
Unpaid Principal Balance
Impaired Loans with No Related Allowance Recorded	191		191		0
Impaired Loans with an Allowance Recorded	292		292		0
Total	483		483		0
Related Valuation Allowance
Impaired Loans with No Related Allowance Recorded	0		0		0
Impaired Loans with an Allowance Recorded	48		48		0
Total	$ 48		$ 48		$ 0

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5258-111524

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-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 14A
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-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953550-111524

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