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City Holding Company (Parent Company Only) Financial Information (Condensed Statements Of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Operating Activities |  |  |
Net income | $ 52,962 us-gaap_NetIncomeLoss | $ 48,215 us-gaap_NetIncomeLoss | $ 38,945 us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Realized investment securities gains | (1,156)us-gaap_RealizedInvestmentGainsLosses | (764)us-gaap_RealizedInvestmentGainsLosses | (1,530)us-gaap_RealizedInvestmentGainsLosses
Stock based compensation | 1,535 us-gaap_ShareBasedCompensation | 1,281 us-gaap_ShareBasedCompensation | 1,083 us-gaap_ShareBasedCompensation
Depreciation | 6,087 us-gaap_Depreciation | 5,757 us-gaap_Depreciation | 4,605 us-gaap_Depreciation
Change in other assets | (8,262)us-gaap_IncreaseDecreaseInOtherOperatingAssets | 22,497 us-gaap_IncreaseDecreaseInOtherOperatingAssets | 2,163 us-gaap_IncreaseDecreaseInOtherOperatingAssets
Change in other liabilities | 1,363 us-gaap_IncreaseDecreaseInOtherOperatingLiabilities | (4,187)us-gaap_IncreaseDecreaseInOtherOperatingLiabilities | 2,575 us-gaap_IncreaseDecreaseInOtherOperatingLiabilities
Net Cash Provided by Operating Activities | 53,354 us-gaap_NetCashProvidedByUsedInOperatingActivities | 75,893 us-gaap_NetCashProvidedByUsedInOperatingActivities | 53,815 us-gaap_NetCashProvidedByUsedInOperatingActivities
Investing Activities |  |  |
Purchases of available for sale securities | (31,295)us-gaap_PaymentsToAcquireAvailableForSaleSecurities | (80,778)us-gaap_PaymentsToAcquireAvailableForSaleSecurities | (171,200)us-gaap_PaymentsToAcquireAvailableForSaleSecurities
Proceeds from sales of available for sale securities | 6,714 us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities | 19,210 us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities | 27,471 us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
Payments to Acquire Business, Net of Cash Acquired |  | (21,853)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired | 20,272 us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
Net Cash Used in Investing Activities | (24,711)us-gaap_NetCashProvidedByUsedInInvestingActivities | (72,686)us-gaap_NetCashProvidedByUsedInInvestingActivities | (78,269)us-gaap_NetCashProvidedByUsedInInvestingActivities
Financing Activities |  |  |
Dividends paid | (24,487)us-gaap_PaymentsOfDividends | (22,878)us-gaap_PaymentsOfDividends | (20,710)us-gaap_PaymentsOfDividends
Purchases of treasury stock | (27,957)us-gaap_PaymentsForRepurchaseOfCommonStock | 0 us-gaap_PaymentsForRepurchaseOfCommonStock | (7,915)us-gaap_PaymentsForRepurchaseOfCommonStock
Exercise of stock options | 600 us-gaap_ProceedsFromStockOptionsExercised | 4,200 us-gaap_ProceedsFromStockOptionsExercised | 500 us-gaap_ProceedsFromStockOptionsExercised
Net Cash Provided by (Used in) Financing Activities | 33,709 us-gaap_NetCashProvidedByUsedInFinancingActivities | (2,325)us-gaap_NetCashProvidedByUsedInFinancingActivities | (36,951)us-gaap_NetCashProvidedByUsedInFinancingActivities
Increase (decrease) in Cash and Cash Equivalents | 62,352 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | 882 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | (61,405)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents at beginning of period | 85,876 us-gaap_CashAndCashEquivalentsAtCarryingValue | 84,994 us-gaap_CashAndCashEquivalentsAtCarryingValue | 146,399 us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and Cash Equivalents at End of Period | 148,228 us-gaap_CashAndCashEquivalentsAtCarryingValue | 85,876 us-gaap_CashAndCashEquivalentsAtCarryingValue | 84,994 us-gaap_CashAndCashEquivalentsAtCarryingValue
Parent Company |  |  |
Operating Activities |  |  |
Net income | 52,962 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 48,215 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 38,945 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Realized investment securities gains | 1,130 us-gaap_RealizedInvestmentGainsLosses / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 89 us-gaap_RealizedInvestmentGainsLosses / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 1,134 us-gaap_RealizedInvestmentGainsLosses / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Amortization and accretion | 0 us-gaap_AdjustmentForAmortization / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 5 us-gaap_AdjustmentForAmortization / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 19 us-gaap_AdjustmentForAmortization / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Stock based compensation | 200 us-gaap_ShareBasedCompensation / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 205 us-gaap_ShareBasedCompensation / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 224 us-gaap_ShareBasedCompensation / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Depreciation | 1 us-gaap_Depreciation / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 1 us-gaap_Depreciation / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 1 us-gaap_Depreciation / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Change in other assets | 16,110 us-gaap_IncreaseDecreaseInOtherOperatingAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (1,656)us-gaap_IncreaseDecreaseInOtherOperatingAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (740)us-gaap_IncreaseDecreaseInOtherOperatingAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Change in other liabilities | 2,146 us-gaap_IncreaseDecreaseInOtherOperatingLiabilities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (236)us-gaap_IncreaseDecreaseInOtherOperatingLiabilities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 1,136 us-gaap_IncreaseDecreaseInOtherOperatingLiabilities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
(Equity in undistributed net income) excess dividends of subsidiaries | (4,441)chco_ExcessDividendsOfSubsidiaries / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (3,662)chco_ExcessDividendsOfSubsidiaries / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 2,480 chco_ExcessDividendsOfSubsidiaries / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net Cash Provided by Operating Activities | 33,628 us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 46,095 us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 42,411 us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Investing Activities |  |  |
Purchases of available for sale securities | 0 us-gaap_PaymentsToAcquireAvailableForSaleSecurities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_PaymentsToAcquireAvailableForSaleSecurities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (403)us-gaap_PaymentsToAcquireAvailableForSaleSecurities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Proceeds from sales of available for sale securities | 2,334 us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 137 us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 2,473 us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Payments to Acquire Business, Net of Cash Acquired |  | (12,708)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (4,672)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net Cash Used in Investing Activities | 2,334 us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (12,571)us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (2,602)us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Financing Activities |  |  |
Dividends paid | (24,487)us-gaap_PaymentsOfDividends / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (22,878)us-gaap_PaymentsOfDividends / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (20,710)us-gaap_PaymentsOfDividends / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Purchases of treasury stock | (27,957)us-gaap_PaymentsForRepurchaseOfCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_PaymentsForRepurchaseOfCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (7,915)us-gaap_PaymentsForRepurchaseOfCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Exercise of stock options | 580 us-gaap_ProceedsFromStockOptionsExercised / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 3,428 us-gaap_ProceedsFromStockOptionsExercised / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 544 us-gaap_ProceedsFromStockOptionsExercised / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net Cash Provided by (Used in) Financing Activities | (51,864)us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (19,450)us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (28,081)us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Increase (decrease) in Cash and Cash Equivalents | (15,902)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 14,074 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 11,728 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Cash and cash equivalents at beginning of period | 28,423 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 14,349 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 2,621 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Cash and Cash Equivalents at End of Period | $ 12,521 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | $ 28,423 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | $ 14,349 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember

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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The net realized gains or losses on investments during the period, not including gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.3(a)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 325 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6485959&loc=d3e22529-158502 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 3 -Subparagraph a -Article 7 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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