Employee Benefit Plans	12 Months Ended
Dec. 31, 2018
Compensation And Retirement Disclosure [Abstract]
Employee Benefit Plans	NOTE 17 – EMPLOYEE BENEFIT PLANS Retirement Plan Old National had a funded noncontributory defined benefit plan (the “Retirement Plan”) that had been frozen since December 31, 2005. During the first quarter of 2016, we notified plan participants of our intent to terminate the Retirement Plan effective May 15, 2016. During October 2016, the Retirement Plan settled plan liabilities through either lump sum distributions to plan participants or annuity contracts purchased from a third party insurance company that provided for the payment of vested benefits to those participants that did not elect the lump sum option. At December 31, 2018, there were no remaining plan assets. Old National made contributions to the Retirement Plan totaling $7.6 million during 2016. As a result of the pension termination, unrecognized losses, which previously were recorded in accumulated other comprehensive loss on the consolidated balance sheets, were recognized as expense and the pension plan settlement loss of $9.8 million was recorded in the consolidated statements of income for the year ended December 31, 2016. Including this settlement charge, the total expense under the Retirement Plan was $11.6 million in 2016. Employee Stock Ownership Plan The Employee Stock Ownership and Savings Plan (the “401(k) Plan”) permits employees to participate the first month following one month of service. Effective as of April 1, 2010, we suspended safe harbor matching contributions to the 401(k) Plan. However, we may make discretionary matching contributions to the 401(k) Plan. During the second quarter of 2018, Old National increased its match to 75% of employee compensation deferral contributions of the first 4% of compensation, and 50% of the next 4% of compensation. The change was retroactive for all of 2018. For 2017 and 2016, we matched 50% of employee compensation deferral contributions, up to 6% of compensation. In addition to matching contributions, Old National may contribute to the 401(k) Plan an amount designated as a profit sharing contribution in the form of Old National stock or cash. Our Board of Directors designated no discretionary profit sharing contributions in 2018, 2017, or 2016. All contributions vest immediately and plan participants may elect to redirect funds among any of the investment options provided under the 401(k) Plan. The number of Old National shares in the 401(k) Plan were 0.7 million at December 31, 2018 and 2017. All shares owned through the 401(k) Plan are included in the calculation of weighted-average shares outstanding for purposes of calculating diluted and basic earnings per share. Contribution expense under the 401(k) Plan was $8.6 million in 2018, $4.7 million in 2017, and $5.0 million in 2016.

Employee Benefit Plans

12 Months Ended

Dec. 31, 2018

Compensation And Retirement Disclosure [Abstract]

NOTE 17 – EMPLOYEE BENEFIT PLANS

Retirement Plan

Old National had a funded noncontributory defined benefit plan (the “Retirement Plan”) that had been frozen since December 31, 2005. During the first quarter of 2016, we notified plan participants of our intent to terminate the Retirement Plan effective May 15, 2016. During October 2016, the Retirement Plan settled plan liabilities through either lump sum distributions to plan participants or annuity contracts purchased from a third party insurance company that provided for the payment of vested benefits to those participants that did not elect the lump sum option. At December 31, 2018, there were no remaining plan assets. Old National made contributions to the Retirement Plan totaling $7.6 million during 2016.

As a result of the pension termination, unrecognized losses, which previously were recorded in accumulated other comprehensive loss on the consolidated balance sheets, were recognized as expense and the pension plan settlement loss of $9.8 million was recorded in the consolidated statements of income for the year ended December 31, 2016. Including this settlement charge, the total expense under the Retirement Plan was $11.6 million in 2016.

Employee Stock Ownership Plan

The Employee Stock Ownership and Savings Plan (the “401(k) Plan”) permits employees to participate the first month following one month of service. Effective as of April 1, 2010, we suspended safe harbor matching contributions to the 401(k) Plan. However, we may make discretionary matching contributions to the 401(k) Plan. During the second quarter of 2018, Old National increased its match to 75% of employee compensation deferral contributions of the first 4% of compensation, and 50% of the next 4% of compensation. The change was retroactive for all of 2018. For 2017 and 2016, we matched 50% of employee compensation deferral contributions, up to 6% of compensation. In addition to matching contributions, Old National may contribute to the 401(k) Plan an amount designated as a profit sharing contribution in the form of Old National stock or cash. Our Board of Directors designated no discretionary profit sharing contributions in 2018, 2017, or 2016. All contributions vest immediately and plan participants may elect to redirect funds among any of the investment options provided under the 401(k) Plan. The number of Old National shares in the 401(k) Plan were 0.7 million at December 31, 2018 and 2017. All shares owned through the 401(k) Plan are included in the calculation of weighted-average shares outstanding for purposes of calculating diluted and basic earnings per share. Contribution expense under the 401(k) Plan was $8.6 million in 2018, $4.7 million in 2017, and $5.0 million in 2016.