Mergers and Acquisitions - Summary of Preliminary Purchase Price of PFC Acquisition and Goodwill (Details) - USD ($) $ in Thousands	Feb. 28, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024
Business Combination [Line Items]
Goodwill recognized		$ 1,600,000		$ 1,100,000
Premier Financial Corporation [Member]
Business Combination [Line Items]
Fair value of Wesbanco shares issued	$ 1,007,845
Cash consideration for outstanding PFC shares	138
Total purchase price	1,007,983
Tangible assets acquired	7,734,236
Core deposit and other intangible assets acquired	158,406
Liabilities assumed	(7,561,426)
Net cash received in the acquisition	200,592
Fair value of net assets acquired	531,808
Goodwill recognized	$ 476,175	$ 476,175	$ 483,397