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City Holding Company (Parent Company Only) Financial Information (Condensed Balance Sheets) (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended | 13 Months Ended |
--- | --- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2017 | Dec. 31, 2014
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |
Issuance of common stock | $ 28,408 | $ 6,864 | $ 0 | $ 36,400 |
Stock Issued During Period, Shares, New Issues | 440,604 | 107,662 | 0 | 548,000 |
Assets |  |  |  |  |
Securities available-for-sale | $ 550,389 | $ 450,083 |  | $ 550,389 |
Deferred tax asset, net | 11,913 | 28,043 |  | 11,913 |
Fixed assets | 72,682 | 75,165 |  | 72,682 |
Other assets | 36,361 | 38,681 |  | 36,361 |
Total Assets | 4,132,281 | 3,984,403 |  | 4,132,281 |
Liabilities |  |  |  |  |
Deferred Tax Liabilities, Net | 2,361 | 3,760 |  | 2,361 |
Other liabilities | 45,426 | 45,512 |  | 45,426 |
Total Liabilities | 3,629,774 | 3,541,965 |  | 3,629,774 |
Total Shareholders’ Equity | 502,507 | 442,438 | $ 419,272 | 502,507 | $ 390,853
Total Liabilities and Shareholders’ Equity | 4,132,281 | 3,984,403 |  | $ 4,132,281 |
Shares Issued, Price Per Share |  |  |  | $ 64.82 |
proceedsthatcouldbereceived | 18,600 |  |  | $ 18,600 |
Parent Company |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |
Issuance of common stock | 28,408 | 6,864 | $ 0 |  |
Assets |  |  |  |  |
Cash | 59,031 | 26,520 |  | 59,031 |
Securities available-for-sale | 5,699 | 4,231 |  | 5,699 |
Investment in subsidiaries | 459,150 | 430,769 |  | 459,150 |
Deferred tax asset, net | 0 | 1,459 |  | 0 |
Fixed assets | 6 | 7 |  | 6 |
Other assets | 2,989 | 2,584 |  | 2,989 |
Total Assets | 526,875 | 465,570 |  | 526,875 |
Liabilities |  |  |  |  |
Junior subordinated debentures | 16,495 | 16,495 |  | 16,495 |
Dividends payable | 7,184 | 6,459 |  | 7,184 |
Deferred Tax Liabilities, Net | 436 | 0 |  | 436 |
Accrued interest payable | 45 | 36 |  | 45 |
Other liabilities | 208 | 142 |  | 208 |
Total Liabilities | 24,368 | 23,132 |  | 24,368 |
Total Shareholders’ Equity | 502,507 | 442,438 |  | 502,507 |
Total Liabilities and Shareholders’ Equity | 526,875 | $ 465,570 |  | $ 526,875 |
Maximum |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |
Issuance of common stock | $ 55,000 |  |  |  |

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