Contingent Liabilities	12 Months Ended
Dec. 31, 2011
Contingent Liabilities [Abstract]
Contingent Liabilities	Note 26—Contingent Liabilities McGrogan v. First Commonwealth Bank is a class action that was filed on January 12, 2009, in the Court of Common Pleas of Allegheny County, Pennsylvania. The action alleges that First Commonwealth Bank promised class members a minimum interest rate of 8% on its IRA Market Rate Savings Account for as long as the class members kept their money on deposit in the IRA account. The class asserts that First Commonwealth committed fraud, breached its modified contract with the class members, and violated the Pennsylvania Unfair Trade Practice and Consumer Protection Law when it resigned as custodian of the IRA Market Rate Savings Accounts in 2008 and offered the class members a roll-over IRA account with a 3.5% interest rate. At that time, aggregate balances in the IRA Market Rate Savings accounts totaled approximately $11.5 million. The class members seek monetary damages for the alleged breach of contract, punitive damages for the alleged fraud and Unfair Trade Practice and Consumer Protection Law violations, and attorney's fees. On July 27, 2011, the court granted class certification as to breach of contract claim and denied class certification as to the fraud and Pennsylvania Unfair Trade Practice and Consumer Protection Law claims. On December 20, 2011, the Plaintiffs filed a Motion for Partial Summary Judgment, and on February 27, 2012, First Commonwealth Bank filed a Motion for Summary Judgment and a Brief in Opposition to the Plaintiffs' Motion for Partial Summary Judgment. Oral argument on these Motions is currently scheduled for April 2012. The amount of liability, if any, will depend upon information which is not presently known to the Bank, including the Court's interpretation of the IRA contract and each class member's life expectancy and pace of distributions from the IRA account. Accordingly, the Company is unable to estimate the amount or range of a reasonably possible loss.

Note 26—Contingent Liabilities

McGrogan v. First Commonwealth Bank is a class action that was filed on January 12, 2009, in the Court of Common Pleas of Allegheny County, Pennsylvania. The action alleges that First Commonwealth Bank promised class members a minimum interest rate of 8% on its IRA Market Rate Savings Account for as long as the class members kept their money on deposit in the IRA account. The class asserts that First Commonwealth committed fraud, breached its modified contract with the class members, and violated the Pennsylvania Unfair Trade Practice and Consumer Protection Law when it resigned as custodian of the IRA Market Rate Savings Accounts in 2008 and offered the class members a roll-over IRA account with a 3.5% interest rate. At that time, aggregate balances in the IRA Market Rate Savings accounts totaled approximately $11.5 million. The class members seek monetary damages for the alleged breach of contract, punitive damages for the alleged fraud and Unfair Trade Practice and Consumer Protection Law violations, and attorney's fees. On July 27, 2011, the court granted class certification as to breach of contract claim and denied class certification as to the fraud and Pennsylvania Unfair Trade Practice and Consumer Protection Law claims. On December 20, 2011, the Plaintiffs filed a Motion for Partial Summary Judgment, and on February 27, 2012, First Commonwealth Bank filed a Motion for Summary Judgment and a Brief in Opposition to the Plaintiffs' Motion for Partial Summary Judgment. Oral argument on these Motions is currently scheduled for April 2012. The amount of liability, if any, will depend upon information which is not presently known to the Bank, including the Court's interpretation of the IRA contract and each class member's life expectancy and pace of distributions from the IRA account. Accordingly, the Company is unable to estimate the amount or range of a reasonably possible loss.