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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, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Operating Activities |  |  |  |  |  |  |  |  |  |  |
Net Income (Loss) Attributable to Parent | $ 22,222 | $ 20,126 | $ 18,251 | $ 28,996 | $ 22,611 | $ 22,371 | $ 22,751 | $ 21,619 | $ 89,595 | $ 89,352 | $ 70,002
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |
Unrealized and Realized Investment Gains (Losses) |  |  |  |  |  |  |  |  | 801 | (957) | 90
Deferred income tax expense (benefit) |  |  |  |  |  |  |  |  | 2,640 | 4,939 | (1,244)
Stock based compensation |  |  |  |  |  |  |  |  | 3,253 | 2,516 | 2,151
Asset write down |  |  |  |  |  |  |  |  | 0 | 297 | 491
Change in other assets |  |  |  |  |  |  |  |  | (13,790) | (1,959) | 5,404
Change in other liabilities |  |  |  |  |  |  |  |  | 11,974 | 7,587 | 4,308
Net Cash Provided by Operating Activities |  |  |  |  |  |  |  |  | 89,795 | 105,048 | 77,572
Investing Activities |  |  |  |  |  |  |  |  |  |  |
Proceeds from sales of available for sale securities |  |  |  |  |  |  |  |  | 30,307 | 70,404 | 0
Payments for (Proceeds from) Loans and Leases |  |  |  |  |  |  |  |  | (3,911) | (30,146) | (95,284)
Net Cash Used in Investing Activities |  |  |  |  |  |  |  |  | (285,286) | (108,831) | (168,465)
Financing Activities |  |  |  |  |  |  |  |  |  |  |
Repayment of long-term debt |  |  |  |  |  |  |  |  | (4,056) | 0 | (16,495)
Proceeds from sale of capital securities |  |  |  |  |  |  |  |  | 0 | 0 | 495
Dividends paid |  |  |  |  |  |  |  |  | (36,673) | (35,547) | (29,583)
Purchases of treasury stock |  |  |  |  |  |  |  |  | (36,481) | (19,431) | (20,271)
Exercise of stock options |  |  |  |  |  |  |  |  | 223 | 526 | 1,164
Net Cash Provided by Financing Activities |  |  |  |  |  |  |  |  | 584,006 | 20,936 | 131,376
Increase in Cash and Cash Equivalents |  |  |  |  |  |  |  |  | 388,515 | 17,153 | 40,483
Cash and cash equivalents at beginning of period |  |  |  | 140,144 |  |  |  | 122,991 | 140,144 | 122,991 | 82,508
Cash and Cash Equivalents at End of Period | 528,659 |  |  |  | 140,144 |  |  |  | 528,659 | 140,144 | 122,991
Parent Company |  |  |  |  |  |  |  |  |  |  |
Operating Activities |  |  |  |  |  |  |  |  |  |  |
Net Income (Loss) Attributable to Parent |  |  |  |  |  |  |  |  | 89,595 | 89,352 | 70,002
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |
Unrealized and Realized Investment Gains (Losses) |  |  |  |  |  |  |  |  | 1,018 | (425) | (208)
Deferred income tax expense (benefit) |  |  |  |  |  |  |  |  | (255) | 173 | (88)
Depreciation, Amortization and Accretion, Net |  |  |  |  |  |  |  |  | 1 | 3 | 1
Stock based compensation |  |  |  |  |  |  |  |  | 3,253 | 2,516 | 2,151
Asset write down |  |  |  |  |  |  |  |  | 0 | 0 | 193
Change in other assets |  |  |  |  |  |  |  |  | (284) | 2,696 | 2,668
Change in other liabilities |  |  |  |  |  |  |  |  | (2,936) | (2,060) | (1,816)
Equity In Undistributed Earnings Of Subsidiaries |  |  |  |  |  |  |  |  | (17,280) | (32,297) | (23,171)
Net Cash Provided by Operating Activities |  |  |  |  |  |  |  |  | 73,112 | 59,958 | 49,732
Investing Activities |  |  |  |  |  |  |  |  |  |  |
Proceeds from sales of available for sale securities |  |  |  |  |  |  |  |  | 0 | 6 | 0
Payments for (Proceeds from) Loans and Leases |  |  |  |  |  |  |  |  | 39 | 38 | 0
Net Cash Used in Investing Activities |  |  |  |  |  |  |  |  | 39 | 44 | (23,452)
Financing Activities |  |  |  |  |  |  |  |  |  |  |
Repayment of long-term debt |  |  |  |  |  |  |  |  | (4,056) | 0 | (16,495)
Proceeds from sale of capital securities |  |  |  |  |  |  |  |  | 0 | 0 | 495
Dividends paid |  |  |  |  |  |  |  |  | (36,673) | (35,547) | (29,583)
Purchases of treasury stock |  |  |  |  |  |  |  |  | (36,481) | (19,431) | (20,271)
Exercise of stock options |  |  |  |  |  |  |  |  | 223 | 526 | 1,164
Net Cash Provided by Financing Activities |  |  |  |  |  |  |  |  | (76,987) | (54,452) | (64,690)
Increase in Cash and Cash Equivalents |  |  |  |  |  |  |  |  | (3,836) | 5,550 | (38,410)
Cash and cash equivalents at beginning of period |  |  |  | $ 26,171 |  |  |  | $ 20,621 | 26,171 | 20,621 | 59,031
Cash and Cash Equivalents at End of Period | $ 22,335 |  |  |  | $ 26,171 |  |  |  | $ 22,335 | 26,171 | 20,621
Farmers Deposit Bancorp, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |
Investing Activities |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired |  |  |  |  |  |  |  |  |  |  | (20,691)
Farmers Deposit Bancorp, Inc. [Member] | Parent Company |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Cash Acquired from Acquisition |  |  |  |  |  |  |  |  |  |  | 946
Investing Activities |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired |  |  |  |  |  |  |  |  |  | 0 | (23,954)
Poage Bankshares, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |
Investing Activities |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired |  |  |  |  |  |  |  |  |  |  | 32,917
Poage Bankshares, Inc. [Member] | Parent Company |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Cash Acquired from Acquisition |  |  |  |  |  |  |  |  |  |  | 518
Investing Activities |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired |  |  |  |  |  |  |  |  |  | $ 0 | $ (502)

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