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SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE - Summary of Securities (Details) - Securities Sold under Agreements to Repurchase - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Short-term Debt [Line Items]
Average balance during the year	$ 12,796	$ 12,769
Average interest rate during the year	0.57%	0.53%
Maximum month-end balance during the year	$ 14,365	$ 14,539
Weighted average interest rate at year-end	0.44%	0.38%

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Weighted average interest rate of short-term debt outstanding calculated at point in time.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-Subparagraph (SX 210.5-02.19(b))
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For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, average borrowings during the period.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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