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v3.25.1

Other Borrowings - Summary of Other Borrowings (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2025 | Dec. 31, 2024
Debt Instrument [Line Items] |  |
Finance lease liabilities | $ 23,440 | $ 24,822
Other borrowings | 642,274 | 689,618
Old National Bank |  |
Debt Instrument [Line Items] |  |
Other basis adjustments | 68,181 | 112,853
Finance lease liabilities | 23,440 | 24,822
Derivative collateralize position amount | $ 68,100 | 112,800
Old National Bank | Subordinated Debt |  |
Debt Instrument [Line Items] |  |
Variable rates | 8.90% |
Variable rate | 4.618% |
Subordinated debentures | $ 12,000 | 12,000
Old National Bank | Leveraged Loans for NMTC |  |
Debt Instrument [Line Items] |  |
Leveraged loans for NMTC (fixed rates of 1.00% to 2.82%) maturing December 2046 to June 2060 | $ 210,251 | 210,251
Old National Bank | Leveraged Loans for NMTC | Minimum |  |
Debt Instrument [Line Items] |  |
Fixed rates | 1.00% |
Old National Bank | Leveraged Loans for NMTC | Maximum |  |
Debt Instrument [Line Items] |  |
Fixed rates | 2.82% |
Old National Bancorp |  |
Debt Instrument [Line Items] |  |
Other basis adjustments | $ 11,759 | 13,049
Old National Bancorp | Subordinated Debt | Subordinated Debentures, Due September 2026 |  |
Debt Instrument [Line Items] |  |
Fixed rates | 5.88% |
Subordinated debentures | $ 150,000 | 150,000
Old National Bancorp | Subordinated Debt | Subordinated Debt Due on June 2030 |  |
Debt Instrument [Line Items] |  |
Fixed rates | 5.25% |
Subordinated debentures | $ 30,000 | 30,000
Old National Bancorp | Junior Subordinated Debentures |  |
Debt Instrument [Line Items] |  |
Junior subordinated debentures (rates of 5.96% to 8.13%) maturing July 2031 to September 2037 | $ 136,643 | $ 136,643
Old National Bancorp | Junior Subordinated Debentures | Minimum |  |
Debt Instrument [Line Items] |  |
Variable rates | 5.96% |
Old National Bancorp | Junior Subordinated Debentures | Maximum |  |
Debt Instrument [Line Items] |  |
Variable rates | 8.13% |

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