Accumulated Other Comprehensive Income (Details Textual)	3 Months Ended
Mar. 31, 2013
Accumulated Other Comprehensive Income (Textual) [Abstract]
Percentage of Federal and State income tax rate	37.00%

Income tax expense benefit combined federal and state income tax rate.

No definition available.

Name:	wsbc_IncomeTaxExpenseBenefitCombinedFederalAndStateIncomeTaxRate
Namespace Prefix:	wsbc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration