Background and Basis of Presentation	9 Months Ended
Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Background and Basis of Presentation	Background and Basis of Presentation City Holding Company ("City Holding"), a West Virginia corporation headquartered in Charleston, West Virginia, is a registered financial holding company under the Bank Holding Company Act and conducts its principal activities through its wholly-owned subsidiary, City National Bank of West Virginia ("City National"). City National is a retail and consumer-oriented community bank with 87 banking offices in West Virginia (58), Virginia (14), Kentucky (12) and southeastern Ohio (3). City National provides credit, deposit, and trust and investment management services to its customers in a broad geographical area that includes many rural and small community markets in addition to larger cities including Charleston (WV), Huntington (WV), Martinsburg (WV), Morgantown (WV), Winchester (VA), Staunton (VA), Virginia Beach (VA), Ashland (KY), and Lexington (KY). In addition to its branch network, City National's delivery channels include automated-teller-machines ("ATMs"), interactive-teller machines ("ITMs"), mobile banking, debit cards, interactive voice response systems, and Internet technology. The Company’s business activities are currently limited to one reportable business segment, which is community banking. On July 11, 2018, the Company announced that it had concurrently executed two separate definitive agreements to acquire Poage Bankshares, Inc. (“Poage”), of Ashland, Kentucky and its principal banking subsidiary, Town Square Bank, and Farmers Deposit Bancorp, Inc. (“Farmers Deposit”), of Cynthiana, Kentucky and its principal banking subsidiary, Farmers Deposit Bank. The proposed mergers are expected to close in the fourth quarter of 2018 and the core data system conversions are also targeted to occur in the fourth quarter of 2018. City has received all regulatory approvals needed to acquire both Poage and Farmers Deposit and each merger has been approved by the shareholders of Poage and Farmers, respectively. Consummation of the respective mergers is subject to the completion of other customary closing conditions. Merger expenses are estimated at $18 million (pre-tax) for the Poage transaction and at $6 million (pre-tax) for the Farmers Deposit transaction, while core deposit intangibles are estimated at $4 million for Poage and at $1.5 million for Farmers Deposit. The Poage and Farmers Deposit transactions are not conditional upon each other. The accompanying consolidated financial statements, which are unaudited, include all of the accounts of City Holding Company and its wholly-owned subsidiaries (collectively, the "Company"). All material intercompany transactions have been eliminated. The consolidated financial statements include all adjustments that, in the opinion of management, are necessary for a fair presentation of the results of operations and financial condition for each of the periods presented. Such adjustments are of a normal recurring nature. The results of operations for the nine months ended September 30, 2018 are not necessarily indicative of the results of operations that can be expected for the year ending December 31, 2018. The Company’s accounting and reporting policies conform with generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Such policies require management to make estimates and develop assumptions that affect the amounts reported in the consolidated financial statements and related footnotes. Actual results could differ from management’s estimates. The consolidated balance sheet as of December 31, 2017 has been derived from audited financial statements included in the Company’s 2017 Annual Report to Shareholders. Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with U.S. generally accepted accounting principles have been omitted. These financial statements should be read in conjunction with the financial statements and notes thereto included in the 2017 Annual Report of the Company. Certain amounts in the financial statements have been reclassified. Such reclassifications had no impact on shareholders’ equity or net income for any period.

Background and Basis of Presentation

City Holding Company ("City Holding"), a West Virginia corporation headquartered in Charleston, West Virginia, is a registered financial holding company under the Bank Holding Company Act and conducts its principal activities through its wholly-owned subsidiary, City National Bank of West Virginia ("City National"). City National is a retail and consumer-oriented community bank with 87 banking offices in West Virginia (58), Virginia (14), Kentucky (12) and southeastern Ohio (3). City National provides credit, deposit, and trust and investment management services to its customers in a broad geographical area that includes many rural and small community markets in addition to larger cities including Charleston (WV), Huntington (WV), Martinsburg (WV), Morgantown (WV), Winchester (VA), Staunton (VA), Virginia Beach (VA), Ashland (KY), and Lexington (KY). In addition to its branch network, City National's delivery channels include automated-teller-machines ("ATMs"), interactive-teller machines ("ITMs"), mobile banking, debit cards, interactive voice response systems, and Internet technology. The Company’s business activities are currently limited to one reportable business segment, which is community banking.

On July 11, 2018, the Company announced that it had concurrently executed two separate definitive agreements to acquire Poage Bankshares, Inc. (“Poage”), of Ashland, Kentucky and its principal banking subsidiary, Town Square Bank, and Farmers Deposit Bancorp, Inc. (“Farmers Deposit”), of Cynthiana, Kentucky and its principal banking subsidiary, Farmers Deposit Bank. The proposed mergers are expected to close in the fourth quarter of 2018 and the core data system conversions are also targeted to occur in the fourth quarter of 2018. City has received all regulatory approvals needed to acquire both Poage and Farmers Deposit and each merger has been approved by the shareholders of Poage and Farmers, respectively. Consummation of the respective mergers is subject to the completion of other customary closing conditions. Merger expenses are estimated at $18 million (pre-tax) for the Poage transaction and at $6 million (pre-tax) for the Farmers Deposit transaction, while core deposit intangibles are estimated at $4 million for Poage and at $1.5 million for Farmers Deposit. The Poage and Farmers Deposit transactions are not conditional upon each other.

The accompanying consolidated financial statements, which are unaudited, include all of the accounts of City Holding Company and its wholly-owned subsidiaries (collectively, the "Company"). All material intercompany transactions have been eliminated. The consolidated financial statements include all adjustments that, in the opinion of management, are necessary for a fair presentation of the results of operations and financial condition for each of the periods presented. Such adjustments are of a normal recurring nature. The results of operations for the nine months ended September 30, 2018 are not necessarily indicative of the results of operations that can be expected for the year ending December 31, 2018. The Company’s accounting and reporting policies conform with generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Such policies require management to make estimates and develop assumptions that affect the amounts reported in the consolidated financial statements and related footnotes. Actual results could differ from management’s estimates.

The consolidated balance sheet as of December 31, 2017 has been derived from audited financial statements included in the Company’s 2017 Annual Report to Shareholders. Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with U.S. generally accepted accounting principles have been omitted. These financial statements should be read in conjunction with the financial statements and notes thereto included in the 2017 Annual Report of the Company.

Certain amounts in the financial statements have been reclassified. Such reclassifications had no impact on shareholders’ equity or net income for any period.