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Deposits - Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Interest-Bearing Deposits
Time deposits greater than $250,000	$ 109,800	$ 50,200

X

- Definition

Time Deposits, $250,000 or More

+ References

No definition available.

+ Details

Name:	lcnb_TimeDeposits250000OrMore
Namespace Prefix:	lcnb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_InterestBearingDepositsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: