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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014
CASH AND CASH EQUIVALENTS [Abstract] |
Short term investment maturity period | 3 months
INVESTMENT SECURITIES [Abstract] |
Par value of FHLB share held (in dollars per share) | $ 100 lcnb_FederalHomeLoanBankParValueOfShareHeld
ALLOWANCE FOR LOAN LOSSES [Abstract] |
Minimum period due consumer loan | 120 days
Period for measurement of loan component | 36 months
Historical loss period | 3 years
STOCK OPTIONS [Abstract] |
Option vesting period | 5 years
Premises [Member] | Minimum |
Property, Plant and Equipment [Line Items] |
Estimated useful life | 15 years
Premises [Member] | Maximum |
Property, Plant and Equipment [Line Items] |
Estimated useful life | 40 years
Equipment | Minimum |
Property, Plant and Equipment [Line Items] |
Estimated useful life | 3 years
Equipment | Maximum |
Property, Plant and Equipment [Line Items] |
Estimated useful life | 10 years

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