SECURITIES (Schedule of Carrying Value, Gross Unrealized Gains and Losses and Estimated Fair Value of Securities) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2018	Dec. 31, 2017
Schedule of Held-to-maturity Securities [Line Items]
Total HTM securities	$ 235,333	$ 199,639
Estimated Fair Value	232,710	203,483
Held to maturity securities unrealized gains before tax	125	3,600
Obligations of States and Political Subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Total HTM securities	235,333	199,639
Gross Unrealized Gains	25	4,014
Gross Unrealized (Losses)	(2,648)	(170)
Estimated Fair Value	$ 232,710	$ 203,483

Held To Maturity Securities Unrealized Gains Before Tax

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Amount of investment in debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
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Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity).

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity).

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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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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.

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