$ONB
Old National Bancorp Stock $onb

$onb Overview Financials Valuation SEC Filings Company Website

2020 Q2 Form 10-Q Financial Statement

#000070717920000141 Filed on July 29, 2020

Income Statement

Concept	2020 Q2	2019 Q2	2019 Q1
Revenue	$162.0M	$189.1M	$178.9M
YoY Change	-14.33%	22.98%	468.91%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$6.500M	$6.700M	$6.400M
YoY Change	-2.99%	13.56%	10.34%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$16.30M	$33.83M	$31.87M
YoY Change	-51.81%	55.39%	66.56%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$61.47M	$77.32M	$69.38M
YoY Change	-20.51%	59.94%	31.05%
Income Tax	$9.761M	$14.36M	$13.10M
% Of Pretax Income	15.88%	18.57%	18.89%
Net Earnings	$51.71M	$62.96M	$56.28M
YoY Change	-17.88%	43.1%	17.28%
Net Earnings / Revenue	31.92%	33.3%	31.45%
Basic Earnings Per Share	$0.32	$0.37	$0.32
Diluted Earnings Per Share	$0.32	$0.36	$0.32
COMMON SHARES
Basic Shares Outstanding	164.7M shares	173.0M shares	174.7M shares
Diluted Shares Outstanding	165.3M shares	173.7M shares	175.4M shares

Balance Sheet

Concept	2020 Q2	2019 Q2	2019 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$310.5M	$301.0M	$323.1M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$462.8M	$493.5M	$490.2M
YoY Change	-6.22%	9.83%	8.07%
Goodwill	$1.037B	$1.036B	$1.036B
YoY Change	0.07%	25.03%	25.03%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets		$36.00M	$64.00M
YoY Change		-64.0%	-32.63%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$22.10B	$20.15B	$20.08B
YoY Change	9.71%	15.23%	14.79%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$277.0M	$237.0M	$253.0M
YoY Change	16.88%	75.56%	83.33%
Deferred Revenue
YoY Change
Short-Term Debt	$369.0M	$745.0M	$668.0M
YoY Change	-50.47%	42.45%	45.85%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$277.0M	$237.0M	$253.0M
YoY Change	16.88%	75.56%	83.33%
LONG-TERM LIABILITIES
Long-Term Debt	$238.0M	$252.0M	$252.0M
YoY Change	-5.56%	0.8%	1.2%
Other Long-Term Liabilities	$29.00M	$43.00M	$28.00M
YoY Change	-32.56%	95.45%	33.33%
Total Long-Term Liabilities	$267.0M	$295.0M	$280.0M
YoY Change	-9.49%	8.46%	3.7%
TOTAL LIABILITIES
Total Short-Term Liabilities	$277.0M	$237.0M	$253.0M
Total Long-Term Liabilities	$267.0M	$295.0M	$280.0M
Total Liabilities	$19.24B	$17.34B	$17.33B
YoY Change	10.93%	13.48%	13.16%
SHAREHOLDERS EQUITY
Retained Earnings	$678.4M	$607.7M	$567.3M
YoY Change	11.64%	28.8%	26.72%
Common Stock	$2.037B	$2.153B	$2.182B
YoY Change	-5.41%	19.96%	21.7%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$2.864B	$2.803B	$2.752B
YoY Change
Total Liabilities & Shareholders Equity	$22.10B	$20.15B	$20.08B
YoY Change	9.71%	15.23%	14.79%

Cashflow Statement

Concept	2020 Q2	2019 Q2	2019 Q1
OPERATING ACTIVITIES
Net Income	$51.71M	$62.96M	$56.28M
YoY Change	-17.88%	43.1%	17.28%
Depreciation, Depletion And Amortization	$6.500M	$6.700M	$6.400M
YoY Change	-2.99%	13.56%	10.34%
Cash From Operating Activities	-$15.50M	$40.40M	$33.01M
YoY Change	-138.37%	-24.34%	-35.78%
INVESTING ACTIVITIES
Capital Expenditures	-$10.80M	-$12.30M	$11.68M
YoY Change	-12.2%	66.22%	21.8%
Acquisitions
YoY Change
Other Investing Activities	-$1.395B	-$7.100M	-$183.7M
YoY Change	19542.25%	-494.44%	2726.15%
Cash From Investing Activities	-$1.405B	-$19.50M	-$195.3M
YoY Change	7106.67%	248.21%	1113.76%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$27.17M
YoY Change			2589.8%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	1.388B	-43.00M	$168.3M
YoY Change	-3327.91%	-17.47%	-454.3%
NET CHANGE
Cash From Operating Activities	-15.50M	40.40M	$33.01M
Cash From Investing Activities	-1.405B	-19.50M	-$195.3M
Cash From Financing Activities	1.388B	-43.00M	$168.3M
Net Change In Cash	-32.80M	-22.10M	$5.951M
YoY Change	48.42%	413.95%	-148.81%
FREE CASH FLOW
Cash From Operating Activities	-$15.50M	$40.40M	$33.01M
Capital Expenditures	-$10.80M	-$12.30M	$11.68M
Free Cash Flow	-$4.700M	$52.70M	$21.33M
YoY Change	-108.92%	-13.32%	-48.99%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Amendment Flag AmendmentFlag	false
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
	dei	Entity Registrant Name EntityRegistrantName	Old National Bancorp /IN/
	dei	Entity Central Index Key EntityCentralIndexKey	0000707179
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
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CY2019Q4	us-gaap	Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	us-gaap:PropertyPlantAndEquipmentNet
CY2020Q2	us-gaap	Finance Lease Liability Statement Of Financial Position Extensible List FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList	us-gaap:OtherBorrowings
CY2019Q4	us-gaap	Finance Lease Liability Statement Of Financial Position Extensible List FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList	us-gaap:OtherBorrowings
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2020-06-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	1-15817
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	IN
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	35-1539838
	dei	Entity Address Address Line1 EntityAddressAddressLine1	One Main Street
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	47708
	dei	Entity Address City Or Town EntityAddressCityOrTown	Evansville,
	dei	Entity Address State Or Province EntityAddressStateOrProvince	IN
	dei	City Area Code CityAreaCode	(800)
	dei	Local Phone Number LocalPhoneNumber	731-2265
	dei	Security12b Title Security12bTitle	Common Stock, No Par Value
	dei	Trading Symbol TradingSymbol	ONB
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
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	onb	Fees And Commission Fiduciary And Trust Activities FeesAndCommissionFiduciaryAndTrustActivities	18444000	USD
CY2020Q2	onb	Fees And Commissions Depositor Account FeesAndCommissionsDepositorAccount	7582000	USD
CY2019Q2	onb	Fees And Commissions Depositor Account FeesAndCommissionsDepositorAccount	11515000	USD
	onb	Fees And Commissions Depositor Account FeesAndCommissionsDepositorAccount	17659000	USD
	onb	Fees And Commissions Depositor Account FeesAndCommissionsDepositorAccount	22341000	USD
CY2020Q2	onb	Debit Card And Atm Fees DebitCardAndAtmFees	4832000	USD
CY2019Q2	onb	Debit Card And Atm Fees DebitCardAndAtmFees	5419000	USD
	onb	Debit Card And Atm Fees DebitCardAndAtmFees	9830000	USD
	onb	Debit Card And Atm Fees DebitCardAndAtmFees	10922000	USD
CY2020Q2	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	17313000	USD
CY2019Q2	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	7135000	USD
	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	28432000	USD
	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	12146000	USD
CY2020Q2	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	4845000	USD
CY2019Q2	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	5591000	USD
	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	10719000	USD
	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	10862000	USD
CY2020Q2	onb	Capital Markets Income CapitalMarketsIncome	6179000	USD
CY2019Q2	onb	Capital Markets Income CapitalMarketsIncome	3150000	USD
	onb	Capital Markets Income CapitalMarketsIncome	10507000	USD
	onb	Capital Markets Income CapitalMarketsIncome	5667000	USD
CY2020Q2	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	2968000	USD
CY2019Q2	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	2711000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	6048000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	5899000	USD
CY2020Q2	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	511000	USD
CY2019Q2	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	1165000	USD
	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	5685000	USD
	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	1062000	USD
CY2020Q2	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	4807000	USD
CY2019Q2	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	4619000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	8775000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	10287000	USD
CY2020Q2	us-gaap	Noninterest Income NoninterestIncome	58461000	USD
CY2019Q2	us-gaap	Noninterest Income NoninterestIncome	51214000	USD
	us-gaap	Noninterest Income NoninterestIncome	115963000	USD
	us-gaap	Noninterest Income NoninterestIncome	97630000	USD
CY2020Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	66556000	USD
CY2019Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	71566000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	145729000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	142749000	USD
CY2020Q2	us-gaap	Occupancy Net OccupancyNet	13245000	USD
CY2019Q2	us-gaap	Occupancy Net OccupancyNet	14559000	USD
	us-gaap	Occupancy Net OccupancyNet	28378000	USD
	us-gaap	Occupancy Net OccupancyNet	29137000	USD
CY2020Q2	us-gaap	Equipment Expense EquipmentExpense	3853000	USD
CY2019Q2	us-gaap	Equipment Expense EquipmentExpense	4517000	USD
	us-gaap	Equipment Expense EquipmentExpense	9158000	USD
	us-gaap	Equipment Expense EquipmentExpense	8991000	USD
CY2020Q2	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	2395000	USD
CY2019Q2	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	4439000	USD
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	5492000	USD
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	8162000	USD
CY2020Q2	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	9629000	USD
CY2019Q2	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	10207000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	19096000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	19548000	USD
CY2020Q2	us-gaap	Communication Communication	2296000	USD
CY2019Q2	us-gaap	Communication Communication	2849000	USD
	us-gaap	Communication Communication	5094000	USD
	us-gaap	Communication Communication	5903000	USD
CY2020Q2	us-gaap	Professional Fees ProfessionalFees	3545000	USD
CY2019Q2	us-gaap	Professional Fees ProfessionalFees	4921000	USD
	us-gaap	Professional Fees ProfessionalFees	7838000	USD
	us-gaap	Professional Fees ProfessionalFees	7831000	USD
CY2020Q2	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	2014000	USD
CY2019Q2	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	1454000	USD
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	3623000	USD
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	3541000	USD
CY2020Q2	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3612000	USD
CY2019Q2	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4325000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	7388000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	8797000	USD
CY2020Q2	us-gaap	Income Loss From Affordable Housing Projects Equity Method Investments IncomeLossFromAffordableHousingProjectsEquityMethodInvestments	-287000	USD
CY2019Q2	us-gaap	Income Loss From Affordable Housing Projects Equity Method Investments IncomeLossFromAffordableHousingProjectsEquityMethodInvestments	-568000	USD
	us-gaap	Income Loss From Affordable Housing Projects Equity Method Investments IncomeLossFromAffordableHousingProjectsEquityMethodInvestments	-5802000	USD
	us-gaap	Income Loss From Affordable Housing Projects Equity Method Investments IncomeLossFromAffordableHousingProjectsEquityMethodInvestments	-828000	USD
CY2020Q2	us-gaap	Other Noninterest Expense OtherNoninterestExpense	12689000	USD
CY2019Q2	us-gaap	Other Noninterest Expense OtherNoninterestExpense	8713000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	41267000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	15672000	USD
CY2020Q2	us-gaap	Noninterest Expense NoninterestExpense	120121000	USD
CY2019Q2	us-gaap	Noninterest Expense NoninterestExpense	128118000	USD
	us-gaap	Noninterest Expense NoninterestExpense	278865000	USD
	us-gaap	Noninterest Expense NoninterestExpense	251159000	USD
CY2020Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	61466000	USD
CY2019Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	77323000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	87045000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	146703000	USD
CY2020Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9761000	USD
CY2019Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14359000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	12700000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	27463000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	51705000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	62964000	USD
	us-gaap	Net Income Loss NetIncomeLoss	74345000	USD
	us-gaap	Net Income Loss NetIncomeLoss	119240000	USD
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.32
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.37
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.45
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.69
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.32
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.36
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.45
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.68
CY2020Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	164732000	shares
CY2019Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	172985000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	166240000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	173855000	shares
CY2020Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	165302000	shares
CY2019Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	173675000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	166848000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	174531000	shares
CY2020Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.14
CY2019Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.13
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.28
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.26
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	51705000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	62964000	USD
	us-gaap	Net Income Loss NetIncomeLoss	74345000	USD
	us-gaap	Net Income Loss NetIncomeLoss	119240000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	15728000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	12311000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	51249000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	119682000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	113514000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	511000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	1165000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	5685000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	1062000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	2906000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	11825000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	25317000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	26403000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	38259000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	88680000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	86049000	USD
CY2020Q2	us-gaap	Other Than Temporary Impairment Losses Investments Reclassification Adjustment Of Noncredit Portion Included In Net Income Heldtomaturity Securities Before Tax OtherThanTemporaryImpairmentLossesInvestmentsReclassificationAdjustmentOfNoncreditPortionIncludedInNetIncomeHeldtomaturitySecuritiesBeforeTax	0	USD
CY2019Q2	us-gaap	Other Than Temporary Impairment Losses Investments Reclassification Adjustment Of Noncredit Portion Included In Net Income Heldtomaturity Securities Before Tax OtherThanTemporaryImpairmentLossesInvestmentsReclassificationAdjustmentOfNoncreditPortionIncludedInNetIncomeHeldtomaturitySecuritiesBeforeTax	564000	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Reclassification Adjustment Of Noncredit Portion Included In Net Income Heldtomaturity Securities Before Tax OtherThanTemporaryImpairmentLossesInvestmentsReclassificationAdjustmentOfNoncreditPortionIncludedInNetIncomeHeldtomaturitySecuritiesBeforeTax	0	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Reclassification Adjustment Of Noncredit Portion Included In Net Income Heldtomaturity Securities Before Tax OtherThanTemporaryImpairmentLossesInvestmentsReclassificationAdjustmentOfNoncreditPortionIncludedInNetIncomeHeldtomaturitySecuritiesBeforeTax	1021000	USD
CY2020Q2	us-gaap	Other Comprehensive Loss Held To Maturity Security Otti After Adjustments Tax OtherComprehensiveLossHeldToMaturitySecurityOttiAfterAdjustmentsTax	0	USD
CY2019Q2	us-gaap	Other Comprehensive Loss Held To Maturity Security Otti After Adjustments Tax OtherComprehensiveLossHeldToMaturitySecurityOttiAfterAdjustmentsTax	-129000	USD
	us-gaap	Other Comprehensive Loss Held To Maturity Security Otti After Adjustments Tax OtherComprehensiveLossHeldToMaturitySecurityOttiAfterAdjustmentsTax	0	USD
	us-gaap	Other Comprehensive Loss Held To Maturity Security Otti After Adjustments Tax OtherComprehensiveLossHeldToMaturitySecurityOttiAfterAdjustmentsTax	-235000	USD
CY2020Q2	us-gaap	Other Comprehensive Loss Held To Maturity Security Otti After Tax And Adjustments OtherComprehensiveLossHeldToMaturitySecurityOttiAfterTaxAndAdjustments	0	USD
CY2019Q2	us-gaap	Other Comprehensive Loss Held To Maturity Security Otti After Tax And Adjustments OtherComprehensiveLossHeldToMaturitySecurityOttiAfterTaxAndAdjustments	-435000	USD
	us-gaap	Other Comprehensive Loss Held To Maturity Security Otti After Tax And Adjustments OtherComprehensiveLossHeldToMaturitySecurityOttiAfterTaxAndAdjustments	0	USD
	us-gaap	Other Comprehensive Loss Held To Maturity Security Otti After Tax And Adjustments OtherComprehensiveLossHeldToMaturitySecurityOttiAfterTaxAndAdjustments	-786000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-246000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	944000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	7557000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	552000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	1670000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	6000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	2101000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-21000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	391000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	-470000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	231000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	1341000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	40000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-1446000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	707000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	4115000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	121000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-27000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-21000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-54000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-41000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-6000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-5000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-13000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-10000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-16000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-41000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-31000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	10886000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	39417000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	92836000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	86987000	USD
CY2020Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	62591000	USD
CY2019Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	102381000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	167181000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	206227000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	2689570000	USD
CY2018Q4	us-gaap	Cumulative Effect Of New Accounting Principle In Period Of Adoption CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	6322000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest Adjusted Balance1 StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	2695892000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	56276000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	47570000	USD
CY2019Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.13
CY2019Q2	us-gaap	Dividends Common Stock DividendsCommonStock	22476000	USD
CY2019Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.13
CY2019Q1	us-gaap	Dividends Common Stock DividendsCommonStock	22812000	USD
CY2019Q1	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	130000	USD
CY2019Q1	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	27297000	USD
CY2019Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1800000	USD
CY2019Q1	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	313000	USD
CY2019Q1	us-gaap	Stockholders Equity StockholdersEquity	2751872000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	62964000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	39417000	USD
CY2019Q2	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	148000	USD
CY2019Q2	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	30845000	USD
CY2019Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1946000	USD
CY2019Q2	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	113000	USD
CY2019Q2	us-gaap	Stockholders Equity StockholdersEquity	2803139000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	4228000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	2852453000	USD
CY2019Q4	us-gaap	Cumulative Effect Of New Accounting Principle In Period Of Adoption CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	-31150000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest Adjusted Balance1 StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	2821303000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	22640000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	81950000	USD
CY2020Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.14
CY2020Q1	us-gaap	Dividends Common Stock DividendsCommonStock	23535000	USD
CY2020Q1	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	151000	USD
CY2020Q1	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	81822000	USD
CY2020Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2748000	USD
CY2020Q1	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	0	USD
CY2020Q1	us-gaap	Stockholders Equity StockholdersEquity	2823435000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	51705000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	10886000	USD
CY2020Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.14
CY2020Q2	us-gaap	Dividends Common Stock DividendsCommonStock	23113000	USD
CY2020Q2	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	145000	USD
CY2020Q2	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	473000	USD
CY2020Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1480000	USD
CY2020Q2	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	190000	USD
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	2864255000	USD
	us-gaap	Net Income Loss NetIncomeLoss	74345000	USD
	us-gaap	Net Income Loss NetIncomeLoss	119240000	USD
	us-gaap	Depreciation Depreciation	15053000	USD
	us-gaap	Depreciation Depreciation	13171000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	7388000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	8797000	USD
	us-gaap	Income Loss From Affordable Housing Projects Equity Method Investments IncomeLossFromAffordableHousingProjectsEquityMethodInvestments	-5802000	USD
	us-gaap	Income Loss From Affordable Housing Projects Equity Method Investments IncomeLossFromAffordableHousingProjectsEquityMethodInvestments	-828000	USD
	us-gaap	Investment Income Net Amortization Of Discount And Premium InvestmentIncomeNetAmortizationOfDiscountAndPremium	-10145000	USD
	us-gaap	Investment Income Net Amortization Of Discount And Premium InvestmentIncomeNetAmortizationOfDiscountAndPremium	-6852000	USD
	onb	Net Accretion Of Premiums And Discounts From Acquired Loans NetAccretionOfPremiumsAndDiscountsFromAcquiredLoans	12406000	USD
	onb	Net Accretion Of Premiums And Discounts From Acquired Loans NetAccretionOfPremiumsAndDiscountsFromAcquiredLoans	20257000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	3746000	USD
	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	734000	USD
	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	1053000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	39495000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2046000	USD
	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	5685000	USD
	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	1062000	USD
	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	-7760000	USD
	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	-227000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	6048000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	5899000	USD
	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	672393000	USD
	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	282134000	USD
	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	602671000	USD
	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	263028000	USD
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-737000	USD
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	1079000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	87642000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-12344000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-19284000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-45426000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-36568000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	73369000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	1154055000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	1038437000	USD
	us-gaap	Payments To Acquire Restricted Investments PaymentsToAcquireRestrictedInvestments	10025000	USD
	us-gaap	Payments To Acquire Restricted Investments PaymentsToAcquireRestrictedInvestments	14439000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	948093000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	335035000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	256438000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	267632000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	0	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	35958000	USD
	us-gaap	Proceeds From Sale Of Restricted Investments ProceedsFromSaleOfRestrictedInvestments	21000	USD
	us-gaap	Proceeds From Sale Of Restricted Investments ProceedsFromSaleOfRestrictedInvestments	19000	USD
	us-gaap	Proceeds From Sale Of Trading Securities Heldforinvestment ProceedsFromSaleOfTradingSecuritiesHeldforinvestment	956000	USD
	us-gaap	Proceeds From Sale Of Trading Securities Heldforinvestment ProceedsFromSaleOfTradingSecuritiesHeldforinvestment	130000	USD
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	1488360000	USD
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	-216356000	USD
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	1899000	USD
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	4374000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	6363000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	2534000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	18714000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	24002000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1457384000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-214840000	USD
	us-gaap	Net Change Interest Bearing Deposits Domestic NetChangeInterestBearingDepositsDomestic	1766049000	USD
	us-gaap	Net Change Interest Bearing Deposits Domestic NetChangeInterestBearingDepositsDomestic	13152000	USD
	us-gaap	Increase Decrease In Federal Funds Purchased IncreaseDecreaseInFederalFundsPurchased	349613000	USD
	us-gaap	Increase Decrease In Federal Funds Purchased IncreaseDecreaseInFederalFundsPurchased	-139901000	USD
	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	325999000	USD
	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	39962000	USD
	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	-27754000	USD
	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	-5407000	USD
	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	3864000	USD
	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	250005000	USD
	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	455770000	USD
	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	425000000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	46648000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	45288000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	82295000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	58142000	USD
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	0	USD
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	280000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	296000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	278000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1528109000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	125292000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	34157000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-16179000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	276337000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	317165000	USD
CY2020Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	310494000	USD
CY2019Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	300986000	USD
	us-gaap	Interest Paid Net InterestPaidNet	42278000	USD
	us-gaap	Interest Paid Net InterestPaidNet	66419000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1999000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1204000	USD
	onb	Investment Securities Purchased But Not Settled InvestmentSecuritiesPurchasedButNotSettled	36681000	USD
	onb	Investment Securities Purchased But Not Settled InvestmentSecuritiesPurchasedButNotSettled	1424000	USD
	onb	Net Reduction In Operating Lease Right Of Use Asset Modifications NetReductionInOperatingLeaseRightOfUseAssetModifications	992000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	117751000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	5225000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	7871000	USD
CY2020Q2	onb	Financing Receivable Number Of Distinct Loan Portfolios FinancingReceivableNumberOfDistinctLoanPortfolios	7	portfolio
CY2020Q2	onb	Financing Receivable Number Of Distinct Loan Portfolios FinancingReceivableNumberOfDistinctLoanPortfolios	7	portfolio
	onb	Current Expected Credit Losses Initial Loss Forecast Term CurrentExpectedCreditLossesInitialLossForecastTerm	P1Y
	onb	Current Expected Credit Losses Reversion Period Term CurrentExpectedCreditLossesReversionPeriodTerm	P2Y
CY2020Q1	us-gaap	Financing Receivable Change In Present Value Interest Income FinancingReceivableChangeInPresentValueInterestIncome	11800000	USD
CY2020Q2	onb	Financing Receivable Number Of Loan Portfolios FinancingReceivableNumberOfLoanPortfolios	4	portfolio
CY2020Q2	onb	Financing Receivable Number Of Loan Segments FinancingReceivableNumberOfLoanSegments	7	segment
CY2020Q1	us-gaap	Notes Receivable Gross NotesReceivableGross	12117524000	USD
CY2020Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	54619000	USD
CY2020Q1	us-gaap	Notes Receivable Gross NotesReceivableGross	12117524000	USD
CY2020Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	54619000	USD
CY2020Q1	us-gaap	Notes Receivable Net NotesReceivableNet	12062905000	USD
CY2020Q1	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	29705000	USD
CY2020Q1	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	2656000	USD
CY2020Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	682185000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	51705000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	62964000	USD
	us-gaap	Net Income Loss NetIncomeLoss	74345000	USD
	us-gaap	Net Income Loss NetIncomeLoss	119240000	USD
CY2020Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	164732000	shares
CY2019Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	172985000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	166240000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	173855000	shares
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.32
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.37
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.45
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.69
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	51705000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	62964000	USD
	us-gaap	Net Income Loss NetIncomeLoss	74345000	USD
	us-gaap	Net Income Loss NetIncomeLoss	119240000	USD
CY2020Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	164732000	shares
CY2019Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	172985000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	166240000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	173855000	shares
CY2020Q2	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	535000	shares
CY2019Q2	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	643000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	571000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	626000	shares
CY2020Q2	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	35000	shares
CY2020Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	5447271000	USD
CY2019Q2	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	47000	shares
	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	37000	shares
	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	50000	shares
CY2020Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	165302000	shares
CY2019Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	173675000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	166848000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	174531000	shares
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.32
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.36
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.45
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.68
CY2020Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	5261392000	USD
CY2020Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	195791000	USD
CY2020Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	9912000	USD
CY2020Q2	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0	USD
CY2020Q2	onb	Available For Sale Securities Debt Maturities Weighted Average Yield AvailableForSaleSecuritiesDebtMaturitiesWeightedAverageYield	0.0276
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	5313209000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	93542000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	21660000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	5385091000	USD
CY2020Q2	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	20028000	USD
CY2019Q2	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	258951000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	256438000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	267632000	USD
CY2020Q2	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables Categorized As Available For Sale ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivablesCategorizedAsAvailableForSale	141964000	USD
CY2019Q2	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables Categorized As Available For Sale ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivablesCategorizedAsAvailableForSale	38430000	USD
	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables Categorized As Available For Sale ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivablesCategorizedAsAvailableForSale	305735000	USD
	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables Categorized As Available For Sale ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivablesCategorizedAsAvailableForSale	62115000	USD
CY2020Q2	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	161992000	USD
CY2019Q2	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	297381000	USD
	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	562173000	USD
	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	329747000	USD
CY2020Q2	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	545000	USD
CY2019Q2	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	3032000	USD
	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	6140000	USD
	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	3103000	USD
CY2020Q2	onb	Realized Gains On Calls Of Available For Sale Securities RealizedGainsOnCallsOfAvailableForSaleSecurities	27000	USD
CY2019Q2	onb	Realized Gains On Calls Of Available For Sale Securities RealizedGainsOnCallsOfAvailableForSaleSecurities	0	USD
	onb	Realized Gains On Calls Of Available For Sale Securities RealizedGainsOnCallsOfAvailableForSaleSecurities	40000	USD
	onb	Realized Gains On Calls Of Available For Sale Securities RealizedGainsOnCallsOfAvailableForSaleSecurities	3000	USD
CY2020Q2	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	61000	USD
CY2019Q2	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	1867000	USD
	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	470000	USD
	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	2015000	USD
CY2020Q2	onb	Realized Loss On Calls Of Available For Sale Securities RealizedLossOnCallsOfAvailableForSaleSecurities	0	USD
CY2019Q2	onb	Realized Loss On Calls Of Available For Sale Securities RealizedLossOnCallsOfAvailableForSaleSecurities	0	USD
	onb	Realized Loss On Calls Of Available For Sale Securities RealizedLossOnCallsOfAvailableForSaleSecurities	25000	USD
	onb	Realized Loss On Calls Of Available For Sale Securities RealizedLossOnCallsOfAvailableForSaleSecurities	29000	USD
CY2020Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	345493000	USD
CY2020Q2	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	1307363000	USD
CY2020Q2	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	1357402000	USD
CY2020Q2	us-gaap	Debt Securities Available For Sale Maturity After10 Years Weighted Average Yield DebtSecuritiesAvailableForSaleMaturityAfter10YearsWeightedAverageYield	0.0323
CY2020Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	5261392000	USD
CY2020Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	5447271000	USD
CY2020Q2	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	511000	USD
CY2019Q2	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	1165000	USD
	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	5685000	USD
	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	1062000	USD
CY2020Q2	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	445695000	USD
CY2020Q2	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	452387000	USD
CY2020Q2	us-gaap	Debt Securities Available For Sale Maturity Within One Year Weighted Average Yield DebtSecuritiesAvailableForSaleMaturityWithinOneYearWeightedAverageYield	0.0238
CY2020Q2	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	2906997000	USD
CY2020Q2	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	3011675000	USD
CY2020Q2	us-gaap	Debt Securities Available For Sale Maturity After One Through Five Years Weighted Average Yield DebtSecuritiesAvailableForSaleMaturityAfterOneThroughFiveYearsWeightedAverageYield	0.0256
CY2020Q2	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	601337000	USD
CY2020Q2	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	625807000	USD
CY2020Q2	us-gaap	Debt Securities Available For Sale Maturity After Five Through Ten Years Weighted Average Yield DebtSecuritiesAvailableForSaleMaturityAfterFiveThroughTenYearsWeightedAverageYield	0.0300
CY2020Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	36515000	USD
CY2020Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	2006000	USD
CY2020Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	7906000	USD
CY2020Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	382008000	USD
CY2020Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	9912000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	1295822000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	11960000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	314350000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	9700000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	1610172000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	21660000	USD
CY2020Q2	onb	Debt Securities Available For Sale Accrued Interest After Allowance For Credit Loss DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss	26400000	USD
	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0	USD
CY2020Q2	onb	Number Of Securities In Security Portfolio NumberOfSecuritiesInSecurityPortfolio	1842	security
CY2020Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	68	security
CY2020Q2	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	40200000	USD
CY2019Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	6800000	USD
CY2020Q2	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	600000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	700000	USD
CY2019Q2	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-18000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	154000	USD
	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	0	USD
	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	0	USD
CY2020Q2	onb	Financing Receivable Number Of Loan Portfolios FinancingReceivableNumberOfLoanPortfolios	4	portfolio
CY2020Q2	onb	Financing Receivable Number Of Loan Segments FinancingReceivableNumberOfLoanSegments	7	portfolio
CY2020Q2	onb	Interest Receivable Loans InterestReceivableLoans	56900000	USD
CY2020Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	106380000	USD
CY2020Q2	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	2232000	USD
CY2020Q2	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	1701000	USD
CY2020Q2	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	22545000	USD
CY2020Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	128394000	USD
CY2020Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	54619000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	10677000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	3610000	USD
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	39495000	USD
CY2020Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	128394000	USD
CY2020Q1	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	8950000	USD
CY2019Q4	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	2656000	USD
CY2020Q1	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	8950000	USD
CY2020Q2	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	2076000	USD
	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	3821000	USD
CY2020Q2	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	11026000	USD
CY2020Q2	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	11026000	USD
	onb	Finance Receivable Past Due Period For Nonaccrual Status FinanceReceivablePastDuePeriodForNonaccrualStatus	P90D
CY2020Q1	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	132431000	USD
CY2020Q1	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	126987000	USD
CY2020Q2	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	125546000	USD
CY2020Q2	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	27666000	USD
CY2020Q2	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	779000	USD
CY2020Q2	onb	Loan Participations LoanParticipations	871400000	USD
CY2020Q2	onb	Loan Participations Sold LoanParticipationsSold	376400000	USD
CY2020Q2	onb	Loan Participations Retained LoanParticipationsRetained	495000000.0	USD
	onb	Troubled Debt Restructuring Modified Term TroubledDebtRestructuringModifiedTerm	P6M
	onb	Non Accrual Loans Maximum Past Due Period NonAccrualLoansMaximumPastDuePeriod	P90D
	onb	Loan Charge Off To Be Recorded Minimum Period LoanChargeOffToBeRecordedMinimumPeriod	P120D
	onb	Loan Charge Off To Be Recorded Maximum Period LoanChargeOffToBeRecordedMaximumPeriod	P180D
CY2020Q1	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	28674000	USD
CY2020Q2	onb	Financing Receivable Troubled Debt Restructuring Write Offs Recoveries FinancingReceivableTroubledDebtRestructuringWriteOffsRecoveries	-53000	USD
CY2020Q2	onb	Financing Receivable Troubled Debt Restructuring Payments Disbursements FinancingReceivableTroubledDebtRestructuringPaymentsDisbursements	1118000	USD
CY2020Q2	onb	Financing Receivable Troubled Debt Restructuring Additions FinancingReceivableTroubledDebtRestructuringAdditions	0	USD
CY2020Q2	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	27609000	USD
CY2019Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	31738000	USD
	onb	Financing Receivable Troubled Debt Restructuring Write Offs Recoveries FinancingReceivableTroubledDebtRestructuringWriteOffsRecoveries	1907000	USD
	onb	Financing Receivable Troubled Debt Restructuring Payments Disbursements FinancingReceivableTroubledDebtRestructuringPaymentsDisbursements	2222000	USD
	onb	Financing Receivable Troubled Debt Restructuring Additions FinancingReceivableTroubledDebtRestructuringAdditions	0	USD
CY2020Q2	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	27609000	USD
CY2020Q2	onb	Financing Receivable Troubled Debt Restructurings Included With Non Accrual Loan FinancingReceivableTroubledDebtRestructuringsIncludedWithNonAccrualLoan	11300000	USD
CY2019Q4	onb	Financing Receivable Troubled Debt Restructurings Included With Non Accrual Loan FinancingReceivableTroubledDebtRestructuringsIncludedWithNonAccrualLoan	13800000	USD
CY2020Q2	onb	Financing Receivable Troubled Debt Restructurings Specific Reserves FinancingReceivableTroubledDebtRestructuringsSpecificReserves	1400000	USD
CY2019Q4	onb	Financing Receivable Troubled Debt Restructurings Specific Reserves FinancingReceivableTroubledDebtRestructuringsSpecificReserves	900000	USD
CY2020Q2	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	700000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	2300000	USD
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	0	loan
	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	0	USD
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	0	USD
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	12	loan
	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	20044000	USD
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	20044000	USD
	onb	Loan To Be Considered As Payment Default In Period LoanToBeConsideredAsPaymentDefaultInPeriod	P90D
CY2019Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	55559000	USD
CY2019Q2	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	2876000	USD
CY2019Q2	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	2606000	USD
CY2019Q2	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	1003000	USD
CY2019Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	56292000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	55461000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	5769000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	4554000	USD
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	2046000	USD
CY2019Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	56292000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	8897000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	45527000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	54619000	USD
CY2019Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	104767000	USD
CY2019Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	11978895000	USD
CY2019Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	12117524000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	109239000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	110353000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	8991000	USD
CY2019Q2	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	113868000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	116739000	USD
CY2019Q1	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	46343000	USD
CY2019Q2	onb	Financing Receivable Troubled Debt Restructuring Write Offs Recoveries FinancingReceivableTroubledDebtRestructuringWriteOffsRecoveries	85000	USD
CY2019Q2	onb	Financing Receivable Troubled Debt Restructuring Payments Disbursements FinancingReceivableTroubledDebtRestructuringPaymentsDisbursements	16961000	USD
CY2019Q2	onb	Financing Receivable Troubled Debt Restructuring Additions FinancingReceivableTroubledDebtRestructuringAdditions	14534000	USD
CY2019Q2	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	43831000	USD
CY2018Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	43710000	USD
	onb	Financing Receivable Troubled Debt Restructuring Write Offs Recoveries FinancingReceivableTroubledDebtRestructuringWriteOffsRecoveries	172000	USD
	onb	Financing Receivable Troubled Debt Restructuring Payments Disbursements FinancingReceivableTroubledDebtRestructuringPaymentsDisbursements	19751000	USD
	onb	Financing Receivable Troubled Debt Restructuring Additions FinancingReceivableTroubledDebtRestructuringAdditions	20044000	USD
CY2019Q2	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	43831000	USD
CY2020Q1	us-gaap	Other Real Estate OtherRealEstate	2163000	USD
CY2019Q1	us-gaap	Other Real Estate OtherRealEstate	3279000	USD
CY2019Q4	us-gaap	Other Real Estate OtherRealEstate	2169000	USD
CY2018Q4	us-gaap	Other Real Estate OtherRealEstate	3232000	USD
CY2020Q2	us-gaap	Real Estate Other Additions RealEstateOtherAdditions	57000	USD
CY2019Q2	us-gaap	Real Estate Other Additions RealEstateOtherAdditions	279000	USD
	us-gaap	Real Estate Other Additions RealEstateOtherAdditions	204000	USD
CY2019Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	3700000	USD
	us-gaap	Real Estate Other Additions RealEstateOtherAdditions	673000	USD
CY2020Q2	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	309000	USD
CY2019Q2	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	705000	USD
	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	423000	USD
	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	977000	USD
CY2020Q2	us-gaap	Real Estate Other Deductions RealEstateOtherDeductions	125000	USD
CY2019Q2	us-gaap	Real Estate Other Deductions RealEstateOtherDeductions	34000	USD
	us-gaap	Real Estate Other Deductions RealEstateOtherDeductions	164000	USD
	us-gaap	Real Estate Other Deductions RealEstateOtherDeductions	109000	USD
CY2020Q2	us-gaap	Other Real Estate OtherRealEstate	1786000	USD
CY2019Q2	us-gaap	Other Real Estate OtherRealEstate	2819000	USD
CY2020Q2	us-gaap	Other Real Estate OtherRealEstate	1786000	USD
CY2019Q2	us-gaap	Other Real Estate OtherRealEstate	2819000	USD
CY2020Q2	us-gaap	Foreclosed Assets ForeclosedAssets	200000	USD
CY2020Q2	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	700000	USD
CY2019Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	500000	USD
CY2020Q2	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	3900000	USD
CY2020Q2	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	597571000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	617284000	USD
CY2020Q2	onb	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	134775000	USD
CY2019Q4	onb	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	126359000	USD
CY2020Q2	onb	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	462796000	USD
CY2019Q4	onb	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	490925000	USD
CY2020Q2	us-gaap	Depreciation Depreciation	6500000	USD
	us-gaap	Depreciation Depreciation	15100000	USD
CY2019Q2	us-gaap	Depreciation Depreciation	6700000	USD
	us-gaap	Depreciation Depreciation	13200000	USD
CY2020Q2	us-gaap	Lease Cost LeaseCost	6873000	USD
CY2019Q2	us-gaap	Lease Cost LeaseCost	4351000	USD
	us-gaap	Lease Cost LeaseCost	16171000	USD
	us-gaap	Lease Cost LeaseCost	8814000	USD
CY2020Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	80400000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	95477000	USD
CY2020Q2	us-gaap	Operating Lease Liability OperatingLeaseLiability	91845000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	99500000	USD
CY2020Q2	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	11973000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	7170000	USD
CY2020Q2	us-gaap	Finance Lease Liability FinanceLeaseLiability	12310000	USD
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	7406000	USD
CY2020Q2	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P10Y7M6D
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P10Y7M6D
CY2020Q2	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P10Y8M12D
CY2019Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P11Y3M18D
CY2020Q2	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0342
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0345
CY2020Q2	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0344
CY2019Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0443
	us-gaap	Operating Lease Payments OperatingLeasePayments	8283000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	8843000	USD
	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	169000	USD
	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	161000	USD
	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	322000	USD
	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	224000	USD
CY2020Q2	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	7849000	USD
CY2020Q2	us-gaap	Finance Lease Liability Payments Remainder Of Fiscal Year FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear	692000	USD
CY2020Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	14916000	USD
CY2020Q2	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	1394000	USD
CY2020Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	13712000	USD
CY2020Q2	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	1412000	USD
CY2020Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	9093000	USD
CY2020Q2	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	1438000	USD
CY2020Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	7917000	USD
CY2020Q2	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	1444000	USD
CY2020Q2	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	56991000	USD
CY2020Q2	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	8443000	USD
CY2020Q2	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	110478000	USD
CY2020Q2	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	14823000	USD
CY2020Q2	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	18633000	USD
CY2020Q2	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	2513000	USD
CY2020Q2	us-gaap	Operating Lease Liability OperatingLeaseLiability	91845000	USD
CY2020Q2	us-gaap	Finance Lease Liability FinanceLeaseLiability	12310000	USD
CY2020Q2	us-gaap	Lessor Operating Lease Payments To Be Received Remainder Of Fiscal Year LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear	1248000	USD
CY2020Q2	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	2354000	USD
CY2020Q2	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	1952000	USD
CY2020Q2	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	1536000	USD
CY2020Q2	us-gaap	Lessor Operating Lease Payments To Be Received Five Years LessorOperatingLeasePaymentsToBeReceivedFiveYears	1409000	USD
CY2020Q2	us-gaap	Lessor Operating Lease Payments To Be Received Thereafter LessorOperatingLeasePaymentsToBeReceivedThereafter	2520000	USD
CY2020Q2	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	11019000	USD
CY2020Q1	us-gaap	Goodwill Goodwill	1036994000	USD
CY2019Q1	us-gaap	Goodwill Goodwill	1036258000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	1036994000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	1036258000	USD
CY2020Q2	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	USD
CY2019Q2	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	USD
	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	USD
	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	USD
CY2020Q2	us-gaap	Goodwill Goodwill	1036994000	USD
CY2019Q2	us-gaap	Goodwill Goodwill	1036258000	USD
CY2020Q2	us-gaap	Goodwill Goodwill	1036994000	USD
CY2019Q2	us-gaap	Goodwill Goodwill	1036258000	USD
CY2019Q3	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020Q2	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	132732000	USD
CY2020Q2	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	80015000	USD
CY2020Q2	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	52717000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	135598000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	75493000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	60105000	USD
	us-gaap	Impairment Of Intangible Assets Indefinitelived Excluding Goodwill ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill	0	USD
	us-gaap	Impairment Of Intangible Assets Indefinitelived Excluding Goodwill ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill	0	USD
CY2020Q2	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3600000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	7400000	USD
CY2019Q2	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4300000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	8800000	USD
CY2020Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear	6703000	USD
CY2020Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	11336000	USD
CY2020Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	9014000	USD
CY2020Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	7053000	USD
CY2020Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	5645000	USD
CY2020Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	12966000	USD
CY2020Q2	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	52717000	USD
CY2020Q2	us-gaap	Servicing Asset ServicingAsset	24000000.0	USD
CY2019Q4	us-gaap	Servicing Asset ServicingAsset	25400000	USD
CY2020Q2	onb	Principal Balance Of Loans Serviced For Others PrincipalBalanceOfLoansServicedForOthers	3509000000	USD
CY2019Q4	onb	Principal Balance Of Loans Serviced For Others PrincipalBalanceOfLoansServicedForOthers	3445000000	USD
CY2020Q2	onb	Percentage Of Mortgage Loans PercentageOfMortgageLoans	0.998
CY2020Q2	us-gaap	Escrow Deposit EscrowDeposit	41100000	USD
CY2019Q4	us-gaap	Escrow Deposit EscrowDeposit	12700000	USD
CY2020Q1	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	25575000	USD
CY2019Q1	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	24271000	USD
CY2019Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	25399000	USD
CY2018Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	24512000	USD
CY2020Q2	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	3672000	USD
CY2019Q2	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	1270000	USD
	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	5403000	USD
	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	1929000	USD
CY2020Q2	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	2959000	USD
CY2019Q2	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	1177000	USD
	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	4514000	USD
	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	2077000	USD
CY2020Q2	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	26288000	USD
CY2019Q2	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	24364000	USD
CY2020Q2	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	26288000	USD
CY2019Q2	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	24364000	USD
CY2020Q1	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	1443000	USD
CY2019Q1	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	17000	USD
CY2019Q4	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	31000	USD
CY2018Q4	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	15000	USD
CY2020Q2	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Provisions Recoveries ValuationAllowanceForImpairmentOfRecognizedServicingAssetsProvisionsRecoveries	810000	USD
CY2019Q2	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Provisions Recoveries ValuationAllowanceForImpairmentOfRecognizedServicingAssetsProvisionsRecoveries	15000	USD
	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Provisions Recoveries ValuationAllowanceForImpairmentOfRecognizedServicingAssetsProvisionsRecoveries	2222000	USD
	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Provisions Recoveries ValuationAllowanceForImpairmentOfRecognizedServicingAssetsProvisionsRecoveries	17000	USD
CY2020Q2	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	2253000	USD
CY2019Q2	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	32000	USD
CY2020Q2	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	2253000	USD
CY2019Q2	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	32000	USD
CY2020Q2	us-gaap	Servicing Asset ServicingAsset	24035000	USD
CY2019Q2	us-gaap	Servicing Asset ServicingAsset	24332000	USD
CY2020Q2	us-gaap	Servicing Asset ServicingAsset	24035000	USD
CY2019Q2	us-gaap	Servicing Asset ServicingAsset	24332000	USD
CY2020Q2	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	24000000.0	USD
	onb	Fair Value Inputs Discount Rate1 FairValueInputsDiscountRate1	0.09
CY2020Q2	onb	Fair Value Inputs Weighted Average Prepayment Speed FairValueInputsWeightedAveragePrepaymentSpeed	0.16
CY2019Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	26500000	USD
CY2019	onb	Fair Value Inputs Discount Rate1 FairValueInputsDiscountRate1	0.12
CY2019Q4	onb	Fair Value Inputs Weighted Average Prepayment Speed FairValueInputsWeightedAveragePrepaymentSpeed	0.10
CY2020Q2	onb	Investments In Qualified Affordable Housing Projects InvestmentsInQualifiedAffordableHousingProjects	61487000	USD
CY2020Q2	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	27514000	USD
CY2019Q4	onb	Investments In Qualified Affordable Housing Projects InvestmentsInQualifiedAffordableHousingProjects	59661000	USD
CY2019Q4	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	25926000	USD
CY2020Q2	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	1063000	USD
CY2020Q2	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	2682000	USD
CY2019Q2	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	1359000	USD
CY2019Q2	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	1575000	USD
	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	7355000	USD
	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	5457000	USD
	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	2412000	USD
	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	2862000	USD
	onb	Percentage Pledged Securities Of Repurchase Agreements Outstanding Balance PercentagePledgedSecuritiesOfRepurchaseAgreementsOutstandingBalance	1.09
	us-gaap	Shortterm Debt Average Outstanding Amount ShorttermDebtAverageOutstandingAmount	339818000	USD
CY2020Q2	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	367744000	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	327782000	USD
CY2019Q2	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	334540000	USD
	us-gaap	Shortterm Debt Average Outstanding Amount ShorttermDebtAverageOutstandingAmount	346396000	USD
	us-gaap	Shortterm Debt Maximum Monthend Outstanding Amount ShorttermDebtMaximumMonthendOutstandingAmount	367744000	USD
	us-gaap	Shortterm Debt Maximum Monthend Outstanding Amount ShorttermDebtMaximumMonthendOutstandingAmount	367884000	USD
	us-gaap	Short Term Debt Weighted Average Interest Rate Over Time ShortTermDebtWeightedAverageInterestRateOverTime	0.0034
	us-gaap	Short Term Debt Weighted Average Interest Rate Over Time ShortTermDebtWeightedAverageInterestRateOverTime	0.0078
CY2020Q2	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0021
CY2019Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0053
CY2019Q2	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0086
CY2020Q2	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	367744000	USD
CY2020Q2	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	2006430000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	1800664000	USD
	onb	Asc815 Fair Value Hedge And Other Basis Adjustments Asc815FairValueHedgeAndOtherBasisAdjustments	28584000	USD
CY2019	onb	Asc815 Fair Value Hedge And Other Basis Adjustments Asc815FairValueHedgeAndOtherBasisAdjustments	22183000	USD
CY2020Q2	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	2035014000	USD
CY2019Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	1822847000	USD
CY2020Q2	us-gaap	Federal Home Loan Bank Advances Activity For Year Average Interest Rate At Period End FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateAtPeriodEnd	0.0181
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Activity For Year Average Interest Rate At Period End FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateAtPeriodEnd	0.0219
CY2020Q2	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due In Remainder Of Fiscal Year FederalHomeLoanBankAdvancesMaturitiesSummaryDueInRemainderOfFiscalYear	80770000	USD
CY2020Q2	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From One To Two Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate	20000000	USD
CY2020Q2	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Two To Three Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate	130500000	USD
CY2020Q2	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Three To Four Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate	160000	USD
CY2020Q2	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Four To Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate	325000000	USD
CY2020Q2	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due After Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate	1450000000	USD
	onb	Asc815 Fair Value Hedge And Other Basis Adjustments Asc815FairValueHedgeAndOtherBasisAdjustments	28584000	USD
CY2020Q2	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	2035014000	USD
CY2020Q2	us-gaap	Other Borrowings OtherBorrowings	237877000	USD
CY2019Q4	us-gaap	Other Borrowings OtherBorrowings	243685000	USD
CY2020Q2	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	497000	USD
CY2020Q2	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	1025000	USD
CY2020Q2	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	1073000	USD
CY2020Q2	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	1132000	USD
CY2020Q2	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	176170000	USD
CY2020Q2	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	61412000	USD
	onb	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net And Other Basis Adjustments DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetAndOtherBasisAdjustments	3432000	USD
CY2020Q2	us-gaap	Other Borrowings OtherBorrowings	237877000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	12547000	USD
CY2020Q2	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	1661000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	39862000	USD
CY2019Q2	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	445000	USD
	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	98802000	USD
	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	5966000	USD
	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	87277000	USD
	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	290000	USD
CY2020Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	3200000	shares
CY2019Q2	onb	Income Tax Reconciliation Non Deductible Expense Interest Disallowance IncomeTaxReconciliationNonDeductibleExpenseInterestDisallowance	123000	USD
CY2020Q2	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2020Q2	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	12908000	USD
CY2019Q2	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	16238000	USD
	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	18279000	USD
	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	30808000	USD
CY2020Q2	onb	Income Tax Reconciliation Tax Exempt Interest IncomeTaxReconciliationTaxExemptInterest	2671000	USD
CY2019Q2	onb	Income Tax Reconciliation Tax Exempt Interest IncomeTaxReconciliationTaxExemptInterest	2604000	USD
	onb	Income Tax Reconciliation Tax Exempt Interest IncomeTaxReconciliationTaxExemptInterest	5303000	USD
	onb	Income Tax Reconciliation Tax Exempt Interest IncomeTaxReconciliationTaxExemptInterest	5135000	USD
CY2020Q2	onb	Income Tax Reconciliation Non Deductible Expense Interest Disallowance IncomeTaxReconciliationNonDeductibleExpenseInterestDisallowance	44000	USD
CY2020Q2	onb	Effective Income Tax Rate Reconciliation Tax Exempt Income Life Insurance Amount EffectiveIncomeTaxRateReconciliationTaxExemptIncomeLifeInsuranceAmount	623000	USD
	onb	Income Tax Reconciliation Non Deductible Expense Interest Disallowance IncomeTaxReconciliationNonDeductibleExpenseInterestDisallowance	116000	USD
	onb	Income Tax Reconciliation Non Deductible Expense Interest Disallowance IncomeTaxReconciliationNonDeductibleExpenseInterestDisallowance	234000	USD
CY2019Q2	onb	Effective Income Tax Rate Reconciliation Tax Exempt Income Life Insurance Amount EffectiveIncomeTaxRateReconciliationTaxExemptIncomeLifeInsuranceAmount	569000	USD
	onb	Effective Income Tax Rate Reconciliation Tax Exempt Income Life Insurance Amount EffectiveIncomeTaxRateReconciliationTaxExemptIncomeLifeInsuranceAmount	1270000	USD
	onb	Effective Income Tax Rate Reconciliation Tax Exempt Income Life Insurance Amount EffectiveIncomeTaxRateReconciliationTaxExemptIncomeLifeInsuranceAmount	1239000	USD
CY2020Q2	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	3250000	USD
CY2019Q2	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	3050000	USD
	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	6457000	USD
	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	6140000	USD
CY2020Q2	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1718000	USD
CY2019Q2	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1558000	USD
	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1711000	USD
	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	3558000	USD
CY2020Q2	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	75000	USD
CY2019Q2	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	353000	USD
	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	3341000	USD
	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	3720000	USD
	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	1134000	USD
	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	1041000	USD
CY2020Q2	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	1819000	USD
CY2019Q2	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	715000	USD
CY2020Q2	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	129000	USD
CY2019Q2	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-25000	USD
	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-454000	USD
	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-670000	USD
CY2020Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9761000	USD
CY2019Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14359000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	12700000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	27463000	USD
CY2020Q2	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.159
CY2019Q2	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.186
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.146
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.187
	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	0	USD
CY2020Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	34576000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	14179000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	1272000	USD
CY2020Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	13507000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	19673000	USD
CY2020Q2	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	0	USD
CY2020Q2	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	19238000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	25336000	USD
CY2020Q2	onb	Deferred Tax Assets Deferred Gain On Securities DeferredTaxAssetsDeferredGainOnSecurities	3027000	USD
CY2019Q4	onb	Deferred Tax Assets Deferred Gain On Securities DeferredTaxAssetsDeferredGainOnSecurities	3754000	USD
CY2020Q2	onb	Deferred Tax Assets Acquired Loan DeferredTaxAssetsAcquiredLoan	13902000	USD
CY2019Q4	onb	Deferred Tax Assets Acquired Loan DeferredTaxAssetsAcquiredLoan	16784000	USD
CY2020Q2	onb	Deferred Tax Assets Operating Lease Liabilities DeferredTaxAssetsOperatingLeaseLiabilities	25845000	USD
CY2019Q4	onb	Deferred Tax Assets Operating Lease Liabilities DeferredTaxAssetsOperatingLeaseLiabilities	26503000	USD
CY2020Q2	onb	Deferred Tax Assets Investments And Other Partnerships DeferredTaxAssetsInvestmentsAndOtherPartnerships	2567000	USD
CY2019Q4	onb	Deferred Tax Assets Investments And Other Partnerships DeferredTaxAssetsInvestmentsAndOtherPartnerships	1765000	USD
CY2020Q2	onb	Deferred Tax Assets Other Real Estate Owned DeferredTaxAssetsOtherRealEstateOwned	138000	USD
CY2019Q4	onb	Deferred Tax Assets Other Real Estate Owned DeferredTaxAssetsOtherRealEstateOwned	141000	USD
CY2020Q2	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	750000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	591000	USD
CY2020Q2	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	113550000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	109998000	USD
CY2020Q2	onb	Deferred Tax Liabilities Purchase Accounting DeferredTaxLiabilitiesPurchaseAccounting	18309000	USD
CY2019Q4	onb	Deferred Tax Liabilities Purchase Accounting DeferredTaxLiabilitiesPurchaseAccounting	17564000	USD
CY2020Q2	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	5964000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	6289000	USD
CY2020Q2	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	8097000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	12167000	USD
CY2020Q2	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	973000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	973000	USD
CY2020Q2	onb	Deferred Tax Liabilities Operating Lease Right Of Use Assets DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets	22922000	USD
CY2019Q4	onb	Deferred Tax Liabilities Operating Lease Right Of Use Assets DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets	25448000	USD
CY2020Q2	onb	Deferred Tax Liabilities Unrealized Gains On Available For Sale Investment Securities DeferredTaxLiabilitiesUnrealizedGainsOnAvailableForSaleInvestmentSecurities	41068000	USD
CY2019Q4	onb	Deferred Tax Liabilities Unrealized Gains On Available For Sale Investment Securities DeferredTaxLiabilitiesUnrealizedGainsOnAvailableForSaleInvestmentSecurities	15751000	USD
CY2020Q2	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	1418000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	78000	USD
CY2020Q2	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	1752000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	2023000	USD
CY2020Q2	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	100503000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	80293000	USD
CY2020Q2	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	13047000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	29705000	USD
CY2020Q2	us-gaap	Bad Debt Reserve For Tax Purposes Of Qualified Lender BadDebtReserveForTaxPurposesOfQualifiedLender	52800000	USD
CY2020Q2	us-gaap	Deferred Tax Liability Not Recognized Amount Of Unrecognized Deferred Tax Liability Bad Debt Reserve For Tax Purposes Of Qualified Lender DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityBadDebtReserveForTaxPurposesOfQualifiedLender	13000000.0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2020Q2	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2020Q2	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	1106000000	USD
CY2019Q4	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	665500000	USD
CY2020Q2	onb	Percentage Of Periodic Changes In Fair Value Qualifies For Hedge Accounting PercentageOfPeriodicChangesInFairValueQualifiesForHedgeAccounting	1
CY2020Q2	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	165366000	USD
CY2019Q4	us-gaap	Interest Rate Derivatives At Fair Value Net InterestRateDerivativesAtFairValueNet	31600000	USD
CY2020Q2	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	22425000	USD
CY2019Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	51301000	USD
CY2019Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	12393000	USD
CY2020Q2	onb	Counterparty Interest Rate Swaps Fair Value CounterpartyInterestRateSwapsFairValue	0	USD
CY2020Q2	us-gaap	Interest Rate Derivatives At Fair Value Net InterestRateDerivativesAtFairValueNet	111100000	USD
CY2020Q2	onb	Loan Commitments LoanCommitments	2999000000	USD
CY2020Q2	onb	Notional Amount Of Standby Letters Of Credit NotionalAmountOfStandbyLettersOfCredit	84300000	USD
	us-gaap	Loans And Leases Receivable Commitments Fixed Rates LoansAndLeasesReceivableCommitmentsFixedRates	2758000000	USD
	us-gaap	Loans And Leases Receivable Commitments Variable Rates LoansAndLeasesReceivableCommitmentsVariableRates	240600000	USD
	onb	Loan Commitments Floating Interest Rate Minimum LoanCommitmentsFloatingInterestRateMinimum	0
	onb	Loan Commitments Floating Interest Rate Maximum LoanCommitmentsFloatingInterestRateMaximum	0.13
CY2019Q4	onb	Loan Commitments LoanCommitments	2779000000	USD
CY2019Q4	onb	Notional Amount Of Standby Letters Of Credit NotionalAmountOfStandbyLettersOfCredit	87800000	USD
CY2020Q2	onb	Allowance For Unfunded Loan Commitments AllowanceForUnfundedLoanCommitments	11000000.0	USD
CY2019Q4	onb	Allowance For Unfunded Loan Commitments AllowanceForUnfundedLoanCommitments	2700000	USD
CY2020Q2	onb	Credit Extended CreditExtended	8300000	USD
CY2019Q4	onb	Credit Extended CreditExtended	8700000	USD
CY2020Q2	onb	Credit Extensions With Collateral CreditExtensionsWithCollateral	7700000	USD
CY2019Q4	onb	Credit Extensions With Collateral CreditExtensionsWithCollateral	7700000	USD
	onb	Term Of Standby Letters Of Credit TermOfStandbyLettersOfCredit	P1Y
CY2020Q2	onb	Notional Amount Of Standby Letters Of Credit NotionalAmountOfStandbyLettersOfCredit	84300000	USD
CY2020Q2	onb	Carrying Value Of Letter Of Credit CarryingValueOfLetterOfCredit	400000	USD
CY2019Q4	onb	Notional Amount Of Standby Letters Of Credit NotionalAmountOfStandbyLettersOfCredit	87800000	USD
CY2019Q4	onb	Carrying Value Of Letter Of Credit CarryingValueOfLetterOfCredit	600000	USD
	onb	Percentage Of Default Probability Assigned To Pool Of Assets PercentageOfDefaultProbabilityAssignedToPoolOfAssets	1
	onb	Percentage Of Recovery Probability Assigned To Each Defaulted Pool Asset PercentageOfRecoveryProbabilityAssignedToEachDefaultedPoolAsset	1
CY2020Q2	onb	Other Real Estate Owned And Other Repossessed Property OtherRealEstateOwnedAndOtherRepossessedProperty	47000	USD
CY2020Q2	onb	Other Real Estate Owned Property Write Down OtherRealEstateOwnedPropertyWriteDown	87000	USD
	onb	Other Real Estate Owned Property Write Down OtherRealEstateOwnedPropertyWriteDown	98000	USD
CY2020Q2	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	2300000	USD
CY2020Q2	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Provisions Recoveries ValuationAllowanceForImpairmentOfRecognizedServicingAssetsProvisionsRecoveries	800000	USD
	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Provisions Recoveries ValuationAllowanceForImpairmentOfRecognizedServicingAssetsProvisionsRecoveries	2200000	USD
CY2019Q2	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Provisions Recoveries ValuationAllowanceForImpairmentOfRecognizedServicingAssetsProvisionsRecoveries	15000	USD
	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Provisions Recoveries ValuationAllowanceForImpairmentOfRecognizedServicingAssetsProvisionsRecoveries	17000	USD
CY2019Q4	onb	Other Real Estate Owned And Other Repossessed Property OtherRealEstateOwnedAndOtherRepossessedProperty	43000	USD
CY2019Q4	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	31000	USD
	onb	Past Due Period Of Mortgage Loans Held For Sale PastDuePeriodOfMortgageLoansHeldForSale	P90D
CY2020Q2	us-gaap	Interest And Fee Income Loans Commercial And Residential Real Estate InterestAndFeeIncomeLoansCommercialAndResidentialRealEstate	500000	USD
	us-gaap	Interest And Fee Income Loans Commercial And Residential Real Estate InterestAndFeeIncomeLoansCommercialAndResidentialRealEstate	900000	USD
CY2019Q2	us-gaap	Interest And Fee Income Loans Commercial And Residential Real Estate InterestAndFeeIncomeLoansCommercialAndResidentialRealEstate	300000	USD
	us-gaap	Interest And Fee Income Loans Commercial And Residential Real Estate InterestAndFeeIncomeLoansCommercialAndResidentialRealEstate	500000	USD
CY2020Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	27828000	USD
CY2019Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	33813000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	58835000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	65306000	USD

Files In Submission

Name	View Source	Status
0000707179-20-000141-index-headers.html	Edgar Link	pending
0000707179-20-000141-index.html	Edgar Link	pending
0000707179-20-000141.txt	Edgar Link	pending
0000707179-20-000141-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
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onb-20200630.xsd	Edgar Link	pending
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onb-20200630_pre.xml	Edgar Link	unprocessable
onbexhibit3112q20.htm	Edgar Link	pending
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$ONB
Old National Bancorp Stock $onb

2020 Q2 Form 10-Q Financial Statement

#000070717920000141 Filed on July 29, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ONB Old National Bancorp Stock $onb

2020 Q2 Form 10-Q Financial Statement

#000070717920000141 Filed on July 29, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ONB
Old National Bancorp Stock $onb