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v3.23.3

Other Borrowings - Additional Information (Details) - USD ($) $ in Thousands | 9 Months Ended |  |  |
--- | --- | --- | --- | ---
Sep. 30, 2023 | Dec. 31, 2022 | Feb. 15, 2022 | Oct. 29, 2020
Debt Instrument [Line Items] |  |  |  |
Other borrowings | $ 21,595 | $ 13,469 |  |
Old National Bank |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Other borrowings | 21,595 | 13,469 |  |
Subordinated Debt | Old National Bank |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Subordinated debentures | 12,000 | 12,000 |  |
Subordinated Debt | Old National Bancorp |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Subordinated debentures | $ 150,000 | $ 150,000 |  |
Fixed rate (in percent) | 5.875% |  |  |
Anchor Bank (MN) | Subordinated Debentures | Subordinated Fixed-to-Floating Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Value of subordinated fixed-to-floating notes assumed |  |  |  | $ 12,000
Anchor Bank (MN) | Subordinated Debentures | Subordinated Fixed-to-Floating Notes | Secured Overnight Financing Rate (SOFR) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Variable rate (in percent) | 4.618% |  |  |
First Midwest |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Subordinated debentures |  |  | $ 150,000 |

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