SECURITIES (Gross Unrealized Losses and Fair Value of Securities) (Details) - USD ($) $ in Thousands  | 
Mar. 31, 2018  | 
Dec. 31, 2017  | 
|---|---|---|
| Schedule of Held-to-maturity Securities [Line Items] | ||
| More than 12 months, Fair Value | $ 2,600 | $ 1,100 | 
| More than 12 months, Unrealized Losses | (67) | (31) | 
| Obligations of States and Political Subdivisions | ||
| Schedule of Held-to-maturity Securities [Line Items] | ||
| Less than 12 months, Fair Value | 57,691 | 18,896 | 
| Less than 12 months, Unrealized Losses | (302) | (139) | 
| More than 12 months, Fair Value | 2,629 | 1,084 | 
| More than 12 months, Unrealized Losses | (67) | (31) | 
| Total, Fair Value | 60,320 | 19,980 | 
| Total, Unrealized Losses | $ (369) | $ (170) | 
| X | ||||||||||
- Definition Amount of accumulated unrealized loss on investments in debt securities classified as held-to-maturity that have been in a continuous loss position for twelve months or longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of accumulated unrealized loss on investments in debt securities classified as held-to-maturity in a continuous loss position. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition This item represents the fair value of securities categorized as held-to-maturity which are in an unrealized loss position. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of accumulated unrealized loss on investments in debt securities classified as held-to-maturity that have been in a continuous loss position for less than twelve months. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition This item represents the fair value of securities categorized as held-to-maturity that have been in a continuous unrealized loss position for less than twelve months. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
- Definition This item represents the fair value of securities categorized as held-to-maturity securities that have been in a continuous unrealized loss position for twelve months or longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 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. No definition available. 
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- Details 
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