City Holding Company (Parent Company Only) Financial Information (Condensed Statements Of Cash Flows) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Activities
Net Income Available to Common Shareholders	$ 23,386	$ 22,732	$ 22,148	$ 19,814	$ 22,222	$ 20,126	$ 18,251	$ 28,996	$ 88,080	$ 89,595	$ 89,352
Adjustments to reconcile net income to net cash provided by operating activities:
Unrealized and Realized Investment Gains (Losses)									(816)	801	(957)
Deferred income tax expense									2,185	2,640	4,939
Stock based compensation									3,121	3,253	2,516
Change in other assets									(8,737)	(13,790)	(1,959)
Change in other liabilities									11,731	11,974	7,587
Net Cash Provided by Operating Activities									102,273	89,795	105,048
Proceeds from Sale of Debt Securities, Available-for-sale									0	30,307	70,404
Investing Activities
Payments for (Proceeds from) Loans and Leases									76,992	(3,911)	(30,146)
Net Cash Used in Investing Activities									(191,167)	(285,286)	(108,831)
Financing Activities
Repayment of long-term debt									0	(4,056)	0
Dividends paid									(36,138)	(36,673)	(35,547)
Purchases of treasury stock									(58,678)	(36,481)	(19,431)
Exercise of stock options									691	223	526
Net Cash Provided by Financing Activities									194,866	584,006	20,936
Increase in Cash and Cash Equivalents									105,972	388,515	17,153
Cash and cash equivalents at beginning of period				528,659				140,144	528,659	140,144	122,991
Cash and Cash Equivalents at End of Period	634,631				528,659				634,631	528,659	140,144
Parent Company
Operating Activities
Net Income Available to Common Shareholders									88,080	89,595	89,352
Adjustments to reconcile net income to net cash provided by operating activities:
Unrealized and Realized Investment Gains (Losses)									(820)	1,018	(425)
Deferred income tax expense									(194)	(255)	173
Depreciation, Amortization and Accretion, Net									0	1	3
Stock based compensation									3,121	3,253	2,516
Change in other assets									89	(284)	2,696
Change in other liabilities									(2,775)	(2,936)	(2,060)
Equity In Undistributed Earnings Of Subsidiaries									7,585	(17,280)	(32,297)
Net Cash Provided by Operating Activities									95,086	73,112	59,958
Proceeds from Sale of Debt Securities, Available-for-sale									3,443	0	6
Investing Activities
Payments for (Proceeds from) Loans and Leases									145	39	38
Net Cash Used in Investing Activities									3,588	39	44
Financing Activities
Repayment of long-term debt									0	(4,056)	0
Dividends paid									(36,138)	(36,673)	(35,547)
Purchases of treasury stock									(58,678)	(36,481)	(19,431)
Exercise of stock options									691	223	526
Net Cash Provided by Financing Activities									(94,125)	(76,987)	(54,452)
Increase in Cash and Cash Equivalents									4,549	(3,836)	5,550
Cash and cash equivalents at beginning of period				$ 22,335				$ 26,171	22,335	26,171	20,621
Cash and Cash Equivalents at End of Period	$ 26,884				$ 22,335				$ 26,884	$ 22,335	$ 26,171