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City Holding Company (Parent Company Only) Financial Information (Condensed Statements Of Comprehensive Income) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Investment securities gains | $ 200 | $ 0 | $ 0 | $ 4,276 | $ 0 | $ 2,668 | $ 845 | $ 0 |  |  |
Interest expense | 4,664 | 4,340 | 4,036 | 3,767 | 3,504 | 3,268 | 3,264 | 3,169 | $ 16,805 | $ 13,207 | $ 11,830
Income tax benefit | 14,972 | 7,003 | 6,812 | 7,647 | 6,338 | 6,577 | 6,303 | 5,866 | 36,435 | 25,083 | 28,414
Net Income Available to Common Shareholders | $ 9,669 | $ 13,932 | $ 14,685 | $ 16,026 | $ 14,656 | $ 13,232 | $ 12,541 | $ 11,702 | 54,310 | 52,128 | 54,097
Total Comprehensive Income |  |  |  |  |  |  |  |  | 56,677 | 48,948 | 54,424
Parent Company |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Dividends from subsidiaries |  |  |  |  |  |  |  |  | 30,000 | 8,600 | 48,950
Investment securities gains |  |  |  |  |  |  |  |  | 200 | 0 | 0
Other income |  |  |  |  |  |  |  |  | 115 | 320 | 22
Income |  |  |  |  |  |  |  |  | 30,315 | 8,920 | 48,972
Interest expense |  |  |  |  |  |  |  |  | 765 | 683 | 618
Other expenses |  |  |  |  |  |  |  |  | 1,636 | 1,957 | 1,170
Expenses |  |  |  |  |  |  |  |  | 2,401 | 2,640 | 1,788
Income Before Income Tax Benefit and Equity in Undistributed Net Income of Subsidiaries |  |  |  |  |  |  |  |  | 27,914 | 6,280 | 47,184
Income tax benefit |  |  |  |  |  |  |  |  | (1,197) | (1,096) | (795)
Income Before Equity in Undistributed Net Income of Subsidiaries |  |  |  |  |  |  |  |  | 29,111 | 7,376 | 47,979
Equity in undistributed net income of subsidiaries |  |  |  |  |  |  |  |  | 25,199 | 44,752 | 6,118
Net Income Available to Common Shareholders |  |  |  |  |  |  |  |  | 54,310 | 52,128 | 54,097
Total Comprehensive Income |  |  |  |  |  |  |  |  | $ 56,677 | $ 48,948 | $ 54,424

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- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e557-108580 + Details
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