Contingent Liabilities	12 Months Ended
Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Contingent Liabilities	Contingent Liabilities Legal proceedings First Commonwealth and its subsidiaries are subject in the normal course of business to various pending and threatened legal proceedings in which claims for monetary damages are asserted. As of December 31, 2016, management, after consultation with legal counsel, does not anticipate that the aggregate ultimate liability arising out of litigation pending or threatened against First Commonwealth or its subsidiaries will be material to First Commonwealth’s consolidated financial position. On at least a quarterly basis, First Commonwealth assesses its liabilities and contingencies in connection with such legal proceedings. For those matters where it is probable that First Commonwealth will incur losses and the amounts of the losses can be reasonably estimated, First Commonwealth records an expense and corresponding liability in its consolidated financial statements. To the extent the pending or threatened litigation could result in exposure in excess of that liability, the amount of such excess is not currently estimable. Although not considered probable, the range of reasonably possible losses for such matters in the aggregate, beyond the existing recorded liability (if any), is between $0 and $7 million. Although First Commonwealth does not believe that the outcome of pending litigation will be material to First Commonwealth’s consolidated financial position, it cannot rule out the possibility that such outcomes will be material to the consolidated results of operations and cash flows for a particular reporting period in the future. First Commonwealth Financial Corporation and First Commonwealth Bank were named defendants in an action commenced August 27, 2015 by eight named plaintiffs that is pending in the Court of Common Pleas of Jefferson County, Pennsylvania. The plaintiffs allege that the Bank repossessed motor vehicles, sold the vehicles and sought to collect deficiency balances in a manner that did not comply with the notice requirements of the Pennsylvania Uniform Commercial Code (UCC), charged inappropriate costs and fees, including storage costs for dates that a repossessed vehicle was not in storage, and wrongly filed forms with the Department of Motor Vehicles asserting that the Bank had complied with applicable laws relating to the repossession of the vehicles. The plaintiffs seek to pursue the action as a class action on behalf of the named plaintiffs and other similarly situated plaintiffs who had their automobiles repossessed and seek to recover damages under the UCC and the Pennsylvania Fair Credit Extension Uniformity Act. First Commonwealth and the Bank contest the plaintiffs’ allegations and intend to oppose class certification. The Bank has also asserted counterclaims for breach of contract, set-off and recoupment against the plaintiffs, individually, and as representatives of the putative class. As set forth in the preceding paragraph, all current litigation matters, including this action, are believed to be within the range of reasonably possible losses for such matters in the aggregate set forth above.

Contingent Liabilities

Legal proceedings

First Commonwealth and its subsidiaries are subject in the normal course of business to various pending and threatened legal

proceedings in which claims for monetary damages are asserted. As of December 31, 2016, management, after consultation

with legal counsel, does not anticipate that the aggregate ultimate liability arising out of litigation pending or threatened against

First Commonwealth or its subsidiaries will be material to First Commonwealth’s consolidated financial position. On at least a

quarterly basis, First Commonwealth assesses its liabilities and contingencies in connection with such legal proceedings. For

those matters where it is probable that First Commonwealth will incur losses and the amounts of the losses can be reasonably

estimated, First Commonwealth records an expense and corresponding liability in its consolidated financial statements. To the

extent the pending or threatened litigation could result in exposure in excess of that liability, the amount of such excess is not

currently estimable. Although not considered probable, the range of reasonably possible losses for such matters in the

aggregate, beyond the existing recorded liability (if any), is between $0 and $7 million. Although First Commonwealth does

not believe that the outcome of pending litigation will be material to First Commonwealth’s consolidated financial position, it

cannot rule out the possibility that such outcomes will be material to the consolidated results of operations and cash flows for a

particular reporting period in the future.

First Commonwealth Financial Corporation and First Commonwealth Bank were named defendants in an action commenced August 27, 2015 by eight named plaintiffs that is pending in the Court of Common Pleas of Jefferson County, Pennsylvania. The plaintiffs allege that the Bank repossessed motor vehicles, sold the vehicles and sought to collect deficiency balances in a manner that did not comply with the notice requirements of the Pennsylvania Uniform Commercial Code (UCC), charged inappropriate costs and fees, including storage costs for dates that a repossessed vehicle was not in storage, and wrongly filed forms with the Department of Motor Vehicles asserting that the Bank had complied with applicable laws relating to the repossession of the vehicles. The plaintiffs seek to pursue the action as a class action on behalf of the named plaintiffs and other similarly situated plaintiffs who had their automobiles repossessed and seek to recover damages under the UCC and the Pennsylvania Fair Credit Extension Uniformity Act. First Commonwealth and the Bank contest the plaintiffs’ allegations and intend to oppose class certification. The Bank has also asserted counterclaims for breach of contract, set-off and recoupment against the plaintiffs, individually, and as representatives of the putative class. As set forth in the preceding paragraph, all current litigation matters, including this action, are believed to be within the range of reasonably possible losses for such matters in the aggregate set forth above.