Revenue Recognition - Summary of Revenue Recognition (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule Of Revenue Recognition [Line Items]
Gain (loss) on change in fair value of investments funded by Wesbanco CDC is not within the scope of ASC 606	$ 0.1	$ (1.0)	$ 3.8
Net Swap Fee and Valuation Income [Member]
Schedule Of Revenue Recognition [Line Items]
Gain (loss) on change in fair value of underlying swaps not within the scope of ASC 606	$ (2.1)	$ 2.7	$ 2.0