SECURITIES - Securities with gross unrealized losses (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2017	Dec. 31, 2016
Investment securities
Fair value - Less than twelve months	$ 99,867	$ 134,561
Gross Unrealized loss - Less than twelve months	(1,227)	(2,658)
Fair value - Twelve months or more	7,222	313
Gross Unrealized loss - Twelve months or more	(159)	(3)
State and municipal securities
Investment securities
Fair value - Less than twelve months	12,454	22,856
Gross Unrealized loss - Less than twelve months	(154)	(647)
Fair value - Twelve months or more	3,321	313
Gross Unrealized loss - Twelve months or more	(60)	(3)
Debt securities
Investment securities
Fair value - Less than twelve months	14,626	18,341
Gross Unrealized loss - Less than twelve months	(170)	(454)
Fair value - Twelve months or more	3,901
Gross Unrealized loss - Twelve months or more	(99)
Collateralized mortgage obligations
Investment securities
Fair value - Less than twelve months	24,945	24,800
Gross Unrealized loss - Less than twelve months	(216)	(325)
Mortgage-backed securities
Investment securities
Fair value - Less than twelve months	46,754	67,500
Gross Unrealized loss - Less than twelve months	(677)	(1,215)
Other securities
Investment securities
Fair value - Less than twelve months	1,088	1,064
Gross Unrealized loss - Less than twelve months	$ (10)	$ (17)

Amount of unrealized loss on securities classified as available-for-sale that have been in a loss position for twelve months or longer.

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- Definition

Amount of unrealized loss on investments in available-for-sale securities that have been in a loss position for less than twelve months.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563

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- Definition

This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563

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- Definition

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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