Commitments and Contingencies	9 Months Ended
Sep. 30, 2013
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 18—COMMITMENTS AND CONTINGENCIES LITIGATION In the normal course of business, Old National Bancorp and its subsidiaries have been named, from time to time, as defendants in various legal actions. Certain of the actual or threatened legal actions include claims for substantial compensatory and/or punitive damages or claims for indeterminate amounts of damages. Old National contests liability and/or the amount of damages as appropriate in each pending matter. In view of the inherent difficulty of predicting the outcome of such matters, particularly in cases where claimants seek substantial or indeterminate damages or where investigations and proceedings are in the early stages, Old National cannot predict with certainty the loss or range of loss, if any, related to such matters, how or if such matters will be resolved, when they will ultimately be resolved, or what the eventual settlement, or other relief, if any, might be. Subject to the foregoing, Old National believes, based on current knowledge and after consultation with counsel, that the outcome of such pending matters will not have a material adverse effect on the consolidated financial condition of Old National, although the outcome of such matters could be material to Old National’s operating results and cash flows for a particular future period, depending on, among other things, the level of Old National’s revenues or income for such period. Old National will accrue for a loss contingency if (1) it is probable that a future event will occur and confirm the loss and (2) the amount of the loss can be reasonably estimated. In November 2010, Old National was named in a class action lawsuit in Vanderburgh County Circuit Court challenging Old National Bank’s checking account practices associated with the assessment of overdraft fees. The theory set forth by plaintiffs in this case is similar to other class action complaints filed against other financial institutions in recent years and settled for substantial amounts. On May 1, 2012, the plaintiff was granted permission to file a First Amended Complaint which named additional plaintiffs and amended certain claims. The plaintiffs seek damages and other relief, including restitution. On June 13, 2012, Old National filed a motion to dismiss the First Amended Complaint, which was subsequently denied by the Court. On September 7, 2012, the plaintiffs filed a motion for class certification, which was granted on March 20, 2013, and provides for a class of “All Old National Bank customers in the State of Indiana who had one or more consumer accounts and who, within the applicable statutes of limitation through August 15, 2010, incurred an overdraft fee as a result of Old National Bank’s practice of sequencing debit card and ATM transactions from highest to lowest.” Old National sought an interlocutory appeal on the issue of class certification on April 2, 2013, which was subsequently denied. Old National does not believe there is a cause of action under Indiana law to support the plaintiffs’ claims. Accordingly, on June 11, 2013, Old National moved for summary judgment. On September 16, 2013, a hearing was held on the summary judgment motion and on September 27, 2013, the Court ordered the parties to mediation and informed the parties that “Court will be denying the motion for summary judgment upon receiving the report of the mediator.” The case is not currently set for trial. Old National believes it has meritorious defenses to the claims brought by the plaintiffs. At this phase of the litigation, it is not possible for management of Old National to determine the probability of a material adverse outcome or reasonably estimate the amount of any loss. LEASES Old National rents certain premises and equipment under operating leases, which expire at various dates. Many of these leases require the payment of property taxes, insurance premiums, maintenance and other costs. In some cases, rentals are subject to increase in relation to a cost-of-living index. The leases have original terms ranging from less than one year to twenty-four years, and Old National has the right, at its option, to extend the terms of certain leases for four additional successive terms of five years. The Company does not have any material sub-lease agreements. As of September 30, 2013 and 2012, Old National had $76.6 million and $85.8 million, respectively, of deferred gains remaining associated with prior sale leaseback transactions. The leases had original terms ranging from five to twenty-four years. These gains will be recognized over the remaining term of the leases. CREDIT-RELATED FINANCIAL INSTRUMENTS In the normal course of business, Old National’s banking affiliates have entered into various agreements to extend credit, including loan commitments of $1.280 billion and standby letters of credit of $72.5 million at September 30, 2013. At September 30, 2013, approximately $1.212 billion of the loan commitments had fixed rates and $68 million had floating rates, with the floating interest rates ranging from 0% to 21%. At December 31, 2012, loan commitments were $1.253 billion and standby letters of credit were $63.4 million. These commitments are not reflected in the consolidated financial statements. At September 30, 2013 and December 31, 2012, the balance of the allowance for unfunded loan commitments was $2.9 million and $4.0 million, respectively. At September 30, 2013 and December 31, 2012, Old National had credit extensions of $13.4 million and $13.3 million, respectively, with various unaffiliated banks related to letter of credit commitments issued on behalf of Old National’s clients. At September 30, 2013 and December 31, 2012, Old National provided collateral to the unaffiliated banks to secure credit extensions totaling $10.3 million and $11.2 million, respectively. Old National did not provide collateral for the remaining credit extensions.

NOTE 18—COMMITMENTS AND CONTINGENCIES

LITIGATION

In the normal course of business, Old National Bancorp and its subsidiaries have been named, from time to time, as defendants in various legal actions. Certain of the actual or threatened legal actions include claims for substantial compensatory and/or punitive damages or claims for indeterminate amounts of damages.

Old National contests liability and/or the amount of damages as appropriate in each pending matter. In view of the inherent difficulty of predicting the outcome of such matters, particularly in cases where claimants seek substantial or indeterminate damages or where investigations and proceedings are in the early stages, Old National cannot predict with certainty the loss or range of loss, if any, related to such matters, how or if such matters will be resolved, when they will ultimately be resolved, or what the eventual settlement, or other relief, if any, might be. Subject to the foregoing, Old National believes, based on current knowledge and after consultation with counsel, that the outcome of such pending matters will not have a material adverse effect on the consolidated financial condition of Old National, although the outcome of such matters could be material to Old National’s operating results and cash flows for a particular future period, depending on, among other things, the level of Old National’s revenues or income for such period. Old National will accrue for a loss contingency if (1) it is probable that a future event will occur and confirm the loss and (2) the amount of the loss can be reasonably estimated.

In November 2010, Old National was named in a class action lawsuit in Vanderburgh County Circuit Court challenging Old National Bank’s checking account practices associated with the assessment of overdraft fees. The theory set forth by plaintiffs in this case is similar to other class action complaints filed against other financial institutions in recent years and settled for substantial amounts. On May 1, 2012, the plaintiff was granted permission to file a First Amended Complaint which named additional plaintiffs and amended certain claims. The plaintiffs seek damages and other relief, including restitution. On June 13, 2012, Old National filed a motion to dismiss the First Amended Complaint, which was subsequently denied by the Court. On September 7, 2012, the plaintiffs filed a motion for class certification, which was granted on March 20, 2013, and provides for a class of “All Old National Bank customers in the State of Indiana who had one or more consumer accounts and who, within the applicable statutes of limitation through August 15, 2010, incurred an overdraft fee as a result of Old National Bank’s practice of sequencing debit card and ATM transactions from highest to lowest.” Old National sought an interlocutory appeal on the issue of class certification on April 2, 2013, which was subsequently denied. Old National does not believe there is a cause of action under Indiana law to support the plaintiffs’ claims. Accordingly, on June 11, 2013, Old National moved for summary judgment. On September 16, 2013, a hearing was held on the summary judgment motion and on September 27, 2013, the Court ordered the parties to mediation and informed the parties that “Court will be denying the motion for summary judgment upon receiving the report of the mediator.” The case is not currently set for trial. Old National believes it has meritorious defenses to the claims brought by the plaintiffs. At this phase of the litigation, it is not possible for management of Old National to determine the probability of a material adverse outcome or reasonably estimate the amount of any loss.

LEASES

Old National rents certain premises and equipment under operating leases, which expire at various dates. Many of these leases require the payment of property taxes, insurance premiums, maintenance and other costs. In some cases, rentals are subject to increase in relation to a cost-of-living index. The leases have original terms ranging from less than one year to twenty-four years, and Old National has the right, at its option, to extend the terms of certain leases for four additional successive terms of five years. The Company does not have any material sub-lease agreements.

As of September 30, 2013 and 2012, Old National had $76.6 million and $85.8 million, respectively, of deferred gains remaining associated with prior sale leaseback transactions. The leases had original terms ranging from five to twenty-four years. These gains will be recognized over the remaining term of the leases.

CREDIT-RELATED FINANCIAL INSTRUMENTS

In the normal course of business, Old National’s banking affiliates have entered into various agreements to extend credit, including loan commitments of $1.280 billion and standby letters of credit of $72.5 million at September 30, 2013. At September 30, 2013, approximately $1.212 billion of the loan commitments had fixed rates and $68 million had floating rates, with the floating interest rates ranging from 0% to 21%. At December 31, 2012, loan commitments were $1.253 billion and standby letters of credit were $63.4 million. These commitments are not reflected in the consolidated financial statements. At September 30, 2013 and December 31, 2012, the balance of the allowance for unfunded loan commitments was $2.9 million and $4.0 million, respectively.

At September 30, 2013 and December 31, 2012, Old National had credit extensions of $13.4 million and $13.3 million, respectively, with various unaffiliated banks related to letter of credit commitments issued on behalf of Old National’s clients. At September 30, 2013 and December 31, 2012, Old National provided collateral to the unaffiliated banks to secure credit extensions totaling $10.3 million and $11.2 million, respectively. Old National did not provide collateral for the remaining credit extensions.