XML 68 R57.htm IDEA: XBRL DOCUMENT
v3.25.2

Loans and Allowance for Credit Losses - Schedule of Composition of Loans and Impact of Adoption (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024 | Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2023
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | $ 47,902,819 |  | $ 47,902,819 |  | $ 36,285,887 |  |  |
Allowance for credit losses on loans | (565,109) | $ (366,335) | (565,109) | $ (366,335) | (392,522) | $ (401,932) | $ (319,713) | $ (307,610)
Net loans | 47,337,710 |  | 47,337,710 |  | 35,893,365 |  |  |
Taxable | 658,508 | 545,622 | 1,174,274 | 1,032,983 |  |  |  |
Portfolio Segment Reclassifications |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | 0 |  | 0 |  | 0 |  |  |
Net loans | 0 |  | 0 |  | 0 |  |  |
Portfolio Segment After Reclassifications |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | 47,902,819 |  | 47,902,819 |  | 36,285,887 |  |  |
Allowance for credit losses on loans | (565,109) |  | (565,109) |  | (392,522) |  |  |
Net loans | 47,337,710 |  | 47,337,710 |  | 35,893,365 |  |  |
Taxable |  |  | 634,400 |  | 163,300 |  |  |
Commercial |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | 14,662,916 |  | 14,662,916 |  | 10,288,560 |  |  |
Allowance for credit losses on loans | (215,917) | (138,460) | (215,917) | (138,460) | (148,722) | (157,587) | (123,437) | (118,333)
Commercial | Portfolio Segment Reclassifications |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | (218,095) |  | (218,095) |  | (232,301) |  |  |
Commercial | Portfolio Segment After Reclassifications |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | 14,444,821 |  | 14,444,821 |  | 10,056,259 |  |  |
Commercial real estate |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | 21,879,785 |  | 21,879,785 |  | 16,307,486 |  |  |
Allowance for credit losses on loans | (294,303) | (189,911) | (294,303) | (189,911) | (200,309) | (198,110) | (160,640) | (155,099)
Commercial real estate | Portfolio Segment Reclassifications |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | (175,181) |  | (175,181) |  | (174,438) |  |  |
Commercial real estate | Portfolio Segment After Reclassifications |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | 21,704,604 |  | 21,704,604 |  | 16,133,048 |  |  |
BBCC |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Allowance for credit losses on loans | (2,488) | (2,897) | (2,488) | (2,897) | (2,813) | (2,695) | (3,163) | (2,887)
BBCC | Portfolio Segment Reclassifications |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | 393,276 |  | 393,276 |  | 406,739 |  |  |
BBCC | Portfolio Segment After Reclassifications |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | 393,276 |  | 393,276 |  | 406,739 |  |  |
Residential real estate |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | 8,212,242 |  | 8,212,242 |  | 6,797,586 |  |  |
Allowance for credit losses on loans | (31,850) | (23,135) | (31,850) | (23,135) | (22,922) | (24,214) | (21,899) | (20,837)
Residential real estate | Portfolio Segment Reclassifications |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | 0 |  | 0 |  | 0 |  |  |
Residential real estate | Portfolio Segment After Reclassifications |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | 8,212,242 |  | 8,212,242 |  | 6,797,586 |  |  |
Consumer |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | 3,147,876 |  | 3,147,876 |  | 2,892,255 |  |  |
Consumer | Portfolio Segment Reclassifications |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | (3,147,876) |  | (3,147,876) |  | (2,892,255) |  |  |
Indirect |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | 1,073,024 |  | 1,073,024 |  | 1,096,778 |  |  |
Allowance for credit losses on loans | (8,430) | (1,233) | (8,430) | (1,233) | (8,434) | (9,063) | (1,218) | (1,236)
Indirect | Portfolio Segment Reclassifications |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | 1,073,024 |  | 1,073,024 |  | 1,096,778 |  |  |
Indirect | Portfolio Segment After Reclassifications |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | 1,073,024 |  | 1,073,024 |  | 1,096,778 |  |  |
Direct |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | 586,841 |  | 586,841 |  | 514,144 |  |  |
Allowance for credit losses on loans | (2,564) | (3,131) | (2,564) | (3,131) | (2,304) | (2,053) | (2,952) | (3,169)
Direct | Portfolio Segment Reclassifications |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | 586,841 |  | 586,841 |  | 514,144 |  |  |
Direct | Portfolio Segment After Reclassifications |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | 586,841 |  | 586,841 |  | 514,144 |  |  |
Home equity |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | 1,488,011 |  | 1,488,011 |  | 1,281,333 |  |  |
Allowance for credit losses on loans | (9,557) | $ (7,568) | (9,557) | $ (7,568) | (7,018) | $ (8,210) | $ (6,404) | $ (6,049)
Home equity | Portfolio Segment Reclassifications |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | 1,488,011 |  | 1,488,011 |  | 1,281,333 |  |  |
Home equity | Portfolio Segment After Reclassifications |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | 1,488,011 |  | 1,488,011 |  | 1,281,333 |  |  |
Direct Finance Leases |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Total loans, net of unearned income | $ 96,300 |  | $ 96,300 |  | $ 120,600 |  |  |

X
- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph c -Publisher SEC + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amortized cost excluding accrued interest, after allowance for credit loss, of financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3B -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-5 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The aggregate interest and fee income generated by: (1) loans the Entity has positive intent and ability to hold for the foreseeable future, or until maturity or payoff, including commercial and consumer loans, whether domestic or foreign, which may consist of: (a) industrial and agricultural; (b) real estate; and (c) real estate construction loans; (d) trade financing; (e) lease financing; (f) home equity lines-of-credit; (g) automobile and other vehicle loans; and (h) credit card and other revolving-type loans and (2) loans and leases held-for-sale which may include mortgage loans, direct financing, and sales-type leases. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 220 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 21 -Publisher FASB -URI https://asc.fasb.org/1943274/2147476153/220-40-55-21 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 + Details
Name: | us-gaap_InterestAndFeeIncomeLoansAndLeases
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_ReclassificationTypeAxis=onb_SegmentPortfolioReclassificationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ReclassificationTypeAxis=onb_SegmentPortfolioReclassificationAdjustedBalanceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=onb_BusinessBankingCreditCenterPortfolioSegmentMember
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: |

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

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

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

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