XML 63 R47.htm IDEA: XBRL DOCUMENT
v3.25.4

Deposits (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2025
Deposits [Abstract] |
Schedule of Maturities of Total Time Deposits | At December 31, 2025, the scheduled maturities of total time deposits were as follows:
(dollars in thousands) |
Due in 2026 | $ | 9,271,979 |
Due in 2027 | 275,838 |
Due in 2028 | 53,190 |
Due in 2029 | 28,147 |
Due in 2030 | 22,270 |
Thereafter | 9,600 |
Total | $ | 9,661,024 |

X
- Definition Schedule Of Maturities Of Time Deposits [Table Text Block] + References No definition available. + Details
Name: | onb_ScheduleOfMaturitiesOfTimeDepositsTableTableTextBlock
Namespace Prefix: | onb_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DepositsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration