XML 98 R81.htm IDEA: XBRL DOCUMENT
v3.20.4

Loans and Allowance for Credit Losses - Non-TDR Loan Modifications due to COVID-19 (Details) - CARES Act Modification $ in Thousands | 3 Months Ended
--- | ---
Dec. 31, 2020 USD ($) numberOfLoanPortfolios
Financing Receivable, Non-Troubled Debt Restructuring Modifications, Amount [Roll Forward] |
June 30, 2020 Deferrals Balance | $ 137,572
Booked Amount End of Period Balance | $ 63,902
December 31, 2020 Number of Deferrals | numberOfLoanPortfolios | 455
Commercial and commercial real estate |
Financing Receivable, Non-Troubled Debt Restructuring Modifications, Amount [Roll Forward] |
June 30, 2020 Deferrals Balance | $ 125,603
Booked Amount End of Period Balance | $ 53,823
December 31, 2020 Number of Deferrals | numberOfLoanPortfolios | 101
Second deferrals between 90 and 180 days, amount | $ 6,300
Residential real estate |
Financing Receivable, Non-Troubled Debt Restructuring Modifications, Amount [Roll Forward] |
June 30, 2020 Deferrals Balance | 1,654
Booked Amount End of Period Balance | $ 1,855
December 31, 2020 Number of Deferrals | numberOfLoanPortfolios | 6
Consumer |
Financing Receivable, Non-Troubled Debt Restructuring Modifications, Amount [Roll Forward] |
June 30, 2020 Deferrals Balance | $ 10,315
Booked Amount End of Period Balance | $ 8,224
December 31, 2020 Number of Deferrals | numberOfLoanPortfolios | 348
Second deferrals between 90 and 180 days, amount | $ 600

X
- Definition Financing Receivable, Non-Troubled Debt Restructuring Modifications, Amount + References No definition available. + Details
Name: | onb_FinancingReceivableNonTroubledDebtRestructuringModificationsAmount
Namespace Prefix: | onb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing Receivable, Non-Troubled Debt Restructuring Modifications, Amount + References No definition available. + Details
Name: | onb_FinancingReceivableNonTroubledDebtRestructuringModificationsAmountRollForward
Namespace Prefix: | onb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Financing Receivable, Non-Troubled Debt Restructuring Modifications, Number Of Contracts + References No definition available. + Details
Name: | onb_FinancingReceivableNonTroubledDebtRestructuringModificationsNumberOfContracts
Namespace Prefix: | onb_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Financing Receivable, Non-Troubled Debt Restructuring Modifications, Second Deferrals Between 90 And 180 Days, Amount + References No definition available. + Details
Name: | onb_FinancingReceivableNonTroubledDebtRestructuringModificationsSecondDeferralsBetween90And180DaysAmount
Namespace Prefix: | onb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_LoanRestructuringModificationNameAxis=onb_CARESActModificationProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=onb_CommercialAndCommercialRealEstatePortfolioSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |