Regulatory Matters - Summary of Risk-Based Capital Amounts and Ratios (Detail) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Percentage of risk-weighted assets in bank holding companies in Tier 1	4.00%
Tier 1 capital to risk-weighted assets, minimum value	6.00%
Total capital to risk-weighted assets, minimum value	8.00%
Common equity tier 1, minimum value	4.50%
Tier 1 leverage, well capitalized	5.00%
Tier 1 capital to risk-weighted assets, well capitalized	8.00%
Total capital to risk-weighted assets, well capitalized	10.00%
Common equity tier 1, well capitalized	6.50%
Tier 1 leverage, amount	$ 1,647,759,000	$ 1,576,764,000
Tier 1 capital to risk-weighted assets, amount	1,647,759,000	1,576,764,000
Total capital to risk-weighted assets, amount	2,039,252,000	1,933,007,000
Common equity tier 1, amount	$ 1,503,275,000	$ 1,432,280,000
Tier 1 leverage, ratio	9.87%	9.90%
Tier 1 capital to risk-weighted assets, ratio	12.05%	12.33%
Total capital to risk-weighted assets, ratio	14.91%	15.11%
Common equity tier 1, ratio	10.99%	11.20%
Wesbanco Bank, Inc [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Percentage of risk-weighted assets in bank holding companies in Tier 1	4.00%
Tier 1 capital to risk-weighted assets, minimum value	6.00%
Total capital to risk-weighted assets, minimum value	8.00%
Common equity tier 1, minimum value	4.50%
Tier 1 leverage, well capitalized	5.00%
Tier 1 capital to risk-weighted assets, well capitalized	8.00%
Total capital to risk-weighted assets, well capitalized	10.00%
Common equity tier 1, well capitalized	6.50%
Tier 1 leverage, amount	$ 1,655,886,000	$ 1,558,305,000
Tier 1 capital to risk-weighted assets, amount	1,655,886,000	1,558,305,000
Total capital to risk-weighted assets, amount	1,770,417,000	1,634,548,000
Common equity tier 1, amount	$ 1,655,886,000	$ 1,558,305,000
Tier 1 leverage, ratio	9.93%	9.80%
Tier 1 capital to risk-weighted assets, ratio	12.13%	12.22%
Total capital to risk-weighted assets, ratio	12.97%	12.81%
Common equity tier 1, ratio	12.13%	12.22%
Minimum [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 leverage, amount	$ 667,914,000	$ 636,966,000
Tier 1 capital to risk-weighted assets, amount	820,560,000	767,334,000
Total capital to risk-weighted assets, amount	1,094,080,000	1,023,112,000
Common equity tier 1, amount	615,420,000	575,500,000
Minimum [Member] | Wesbanco Bank, Inc [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 leverage, amount	667,039,000	636,033,000
Tier 1 capital to risk-weighted assets, amount	818,976,000	765,439,000
Total capital to risk-weighted assets, amount	1,091,968,000	1,020,585,000
Common equity tier 1, amount	$ 614,232,000	$ 574,079,000