Fair Value of Plan Assets - Statements of Net Assets Available for Benefits Measured at Fair Value (Details) - Community Trust Bancorp, Inc. Savings Plan [Member] - USD ($)	Dec. 31, 2025	Dec. 31, 2024
Fair Value of Plan Assets [Abstract]
Fair Value	$ 95,349,583	$ 84,203,661
CTBI Common Stock [Member]
Fair Value of Plan Assets [Abstract]
Fair Value	17,194,927	16,150,499
Mutual Fund [Member]
Fair Value of Plan Assets [Abstract]
Fair Value	72,293,241	62,458,076
Money Market Funds [Member]
Fair Value of Plan Assets [Abstract]
Fair Value	5,861,415	5,595,086
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value of Plan Assets [Abstract]
Fair Value	95,349,583	84,203,661
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| CTBI Common Stock [Member]
Fair Value of Plan Assets [Abstract]
Fair Value	17,194,927	16,150,499
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Mutual Fund [Member]
Fair Value of Plan Assets [Abstract]
Fair Value	72,293,241	62,458,076
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Money Market Funds [Member]
Fair Value of Plan Assets [Abstract]
Fair Value	5,861,415	5,595,086
Significant Other Observable Inputs (Level 2) [Member]
Fair Value of Plan Assets [Abstract]
Fair Value	0	0
Significant Other Observable Inputs (Level 2) [Member] \| CTBI Common Stock [Member]
Fair Value of Plan Assets [Abstract]
Fair Value	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Mutual Fund [Member]
Fair Value of Plan Assets [Abstract]
Fair Value	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Money Market Funds [Member]
Fair Value of Plan Assets [Abstract]
Fair Value	0	0
Significant Unobservable Inputs (Level 3) [Member]
Fair Value of Plan Assets [Abstract]
Fair Value	0	0
Significant Unobservable Inputs (Level 3) [Member] \| CTBI Common Stock [Member]
Fair Value of Plan Assets [Abstract]
Fair Value	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Mutual Fund [Member]
Fair Value of Plan Assets [Abstract]
Fair Value	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Money Market Funds [Member]
Fair Value of Plan Assets [Abstract]
Fair Value	$ 0	$ 0

Fair value of investment, excluding plan interest in master trust, held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Includes, but is not limited to, derivative, investment measured at net asset value per share as practical expedient, and insurance contract not meeting fully-benefit responsive investment criteria.

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+ Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details