Summary of Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2013
Summary of Significant Accounting Policies [Abstract]
BASIS OF PRESENTATION	BASIS OF PRESENTATION— The accompanying unaudited interim financial statements of WesBanco, Inc. and its consolidated subsidiaries (“WesBanco”) have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements and should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2012. WesBanco’s interim financial statements have been prepared following the significant accounting policies disclosed in Note 1 of the Notes to the Consolidated Financial Statements of its 2012 Annual Report on Form 10-K filed with the Securities and Exchange Commission. In the opinion of management, the accompanying interim financial information reflects all adjustments, including normal recurring adjustments, necessary to present fairly WesBanco’s financial position and results of operations for each of the interim periods presented. Results of operations for interim periods are not necessarily indicative of the results of operations that may be expected for a full year.
RECENT ACCOUNTING PRONOUNCEMENTS	RECENT ACCOUNTING PRONOUNCEMENTS— In February 2013, the Financial Accounting Standards Board (the “FASB”) issued an accounting pronouncement to improve the reporting of reclassifications out of accumulated other comprehensive income. The amendment does not change the current requirements for reporting net income or other comprehensive income in the financial statements. However, the amendment requires an entity to provide information about the amounts reclassified out of accumulated other comprehensive income by component and including references to other disclosures. The pronouncement is effective prospectively for interim and annual reporting periods beginning after December 15, 2012. The adoption of this pronouncement did not to have a material impact on WesBanco’s consolidated financial statements. In December 2011, the FASB issued an accounting pronouncement which requires entities to disclose both gross and net information about instruments and transactions eligible for offset in the statement of financial position, including instruments and transactions subject to master netting arrangements. The scope would include derivatives, sale and repurchase agreements and reverse sale and repurchase agreements, and securities borrowing and securities lending arrangements. The objective of this disclosure is to enhance disclosures required by GAAP by requiring improved information about financial instruments and derivative instruments that are either offset in accordance with existing GAAP or subject to an enforceable master netting arrangement or similar agreement. This information will enable users of an entity’s financial statements to evaluate the effect or potential effect of netting arrangements on an entity’s financial position, including the effect or potential effect of rights of setoff associated with certain financial instruments and derivative instruments. In January 2013, the FASB issued an accounting pronouncement to clarify and limit the scope of the aforementioned pronouncement by more specifically defining transactions eligible for offset. The pronouncements should be applied retrospectively effective for fiscal years, and interim periods within those years, beginning after January 1, 2013. The adoption of these pronouncements did not have a material impact on WesBanco’s consolidated financial statements.

Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2013

Summary of Significant Accounting Policies [Abstract]

BASIS OF PRESENTATION— The accompanying unaudited interim financial statements of WesBanco, Inc. and its consolidated subsidiaries (“WesBanco”) have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements and should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2012.

WesBanco’s interim financial statements have been prepared following the significant accounting policies disclosed in Note 1 of the Notes to the Consolidated Financial Statements of its 2012 Annual Report on Form 10-K filed with the Securities and Exchange Commission. In the opinion of management, the accompanying interim financial information reflects all adjustments, including normal recurring adjustments, necessary to present fairly WesBanco’s financial position and results of operations for each of the interim periods presented. Results of operations for interim periods are not necessarily indicative of the results of operations that may be expected for a full year.

RECENT ACCOUNTING PRONOUNCEMENTS

RECENT ACCOUNTING PRONOUNCEMENTS— In February 2013, the Financial Accounting Standards Board (the “FASB”) issued an accounting pronouncement to improve the reporting of reclassifications out of accumulated other comprehensive income. The amendment does not change the current requirements for reporting net income or other comprehensive income in the financial statements. However, the amendment requires an entity to provide information about the amounts reclassified out of accumulated other comprehensive income by component and including references to other disclosures. The pronouncement is effective prospectively for interim and annual reporting periods beginning after December 15, 2012. The adoption of this pronouncement did not to have a material impact on WesBanco’s consolidated financial statements.

In December 2011, the FASB issued an accounting pronouncement which requires entities to disclose both gross and net information about instruments and transactions eligible for offset in the statement of financial position, including instruments and transactions subject to master netting arrangements. The scope would include derivatives, sale and repurchase agreements and reverse sale and repurchase agreements, and securities borrowing and securities lending arrangements. The objective of this disclosure is to enhance disclosures required by GAAP by requiring improved information about financial instruments and derivative instruments that are either offset in accordance with existing GAAP or subject to an enforceable master netting arrangement or similar agreement. This information will enable users of an entity’s financial statements to evaluate the effect or potential effect of netting arrangements on an entity’s financial position, including the effect or potential effect of rights of setoff associated with certain financial instruments and derivative instruments. In January 2013, the FASB issued an accounting pronouncement to clarify and limit the scope of the aforementioned pronouncement by more specifically defining transactions eligible for offset. The pronouncements should be applied retrospectively effective for fiscal years, and interim periods within those years, beginning after January 1, 2013. The adoption of these pronouncements did not have a material impact on WesBanco’s consolidated financial statements.