Acquisition	3 Months Ended
Mar. 31, 2018
Business Combinations [Abstract]
Acquisitions	Acquisition On December 20, 2017, LCNB and Columbus First Bancorp, Inc. (“CFB”) entered into an Agreement and Plan of Merger (“Merger Agreement”) pursuant to which CFB will merge with and into LCNB in an all-stock transaction. Immediately following the merger of CFB into LCNB, Columbus First Bank, a wholly-owned subsidiary of CFB, will be merged into the Bank. Columbus First Bank operates from one full-service office located in Worthington, Ohio. Subject to customary regulatory approvals, LCNB shareholder approval, and other conditions set forth in the Merger Agreement, the transaction is anticipated to close in the second quarter of 2018. At that time, Columbus First Bank's sole office will become a branch of the Bank. Under the terms of the Merger Agreement, which has been unanimously approved by the Board of Directors of each company, the shareholders of CFB will be entitled to receive two LCNB common shares for each outstanding CFB common share. Any unexercised stock options of CFB will be canceled in exchange for a cash payment. Based on LCNB's closing share price of $19.00 as of March 31, 2018, the transaction is valued at $38.00 for each CFB share or approximately $60.4 million in aggregate. As of March 31, 2018, CFB has 1,589,516 shares outstanding, as well as 65,724 options with a weighted average strike price of $14.06 per share. The acquisition will be accounted for in accordance with applicable accounting guidance. Accordingly, the assets and liabilities of CFB will be recorded at their estimated fair values at the acquisition date. The excess of the estimated fair value of LCNB common shares issued over the net fair values of the assets acquired, including identifiable intangible assets and liabilities assumed, will be recorded as goodwill. The results of operations will be included in the consolidated income statement from the date of the acquisition. Goodwill will be subject to an annual test for impairment and the amount impaired, if any, will be charged to expense at the time of impairment. The estimated fair values of the assets and liabilities have not yet been determined. The recorded amounts reflected on the historic financial records of CFB as of March 31, 2018 include total assets of approximately $324.1 million, consisting primarily of net loans of $276.9 million and interest-bearing deposits of $31.1 million. Recorded liabilities totaling approximately $290.7 million consisted primarily of deposits totaling $253.7 million.

Acquisition

On December 20, 2017, LCNB and Columbus First Bancorp, Inc. (“CFB”) entered into an Agreement and Plan of Merger (“Merger Agreement”) pursuant to which CFB will merge with and into LCNB in an all-stock transaction. Immediately following the merger of CFB into LCNB, Columbus First Bank, a wholly-owned subsidiary of CFB, will be merged into the Bank. Columbus First Bank operates from one full-service office located in Worthington, Ohio. Subject to customary regulatory approvals, LCNB shareholder approval, and other conditions set forth in the Merger Agreement, the transaction is anticipated to close in the second quarter of 2018. At that time, Columbus First Bank's sole office will become a branch of the Bank.

Under the terms of the Merger Agreement, which has been unanimously approved by the Board of Directors of each company, the shareholders of CFB will be entitled to receive two LCNB common shares for each outstanding CFB common share. Any unexercised stock options of CFB will be canceled in exchange for a cash payment. Based on LCNB's closing share price of $19.00 as of March 31, 2018, the transaction is valued at $38.00 for each CFB share or approximately $60.4 million in aggregate. As of March 31, 2018, CFB has 1,589,516 shares outstanding, as well as 65,724 options with a weighted average strike price of $14.06 per share.

The acquisition will be accounted for in accordance with applicable accounting guidance. Accordingly, the assets and liabilities of CFB will be recorded at their estimated fair values at the acquisition date. The excess of the estimated fair value of LCNB common shares issued over the net fair values of the assets acquired, including identifiable intangible assets and liabilities assumed, will be recorded as goodwill. The results of operations will be included in the consolidated income statement from the date of the acquisition. Goodwill will be subject to an annual test for impairment and the amount impaired, if any, will be charged to expense at the time of impairment.

The estimated fair values of the assets and liabilities have not yet been determined. The recorded amounts reflected on the historic financial records of CFB as of March 31, 2018 include total assets of approximately $324.1 million, consisting primarily of net loans of $276.9 million and interest-bearing deposits of $31.1 million. Recorded liabilities totaling approximately $290.7 million consisted primarily of deposits totaling $253.7 million.