$ONB
Old National Bancorp Stock $onb

$onb Overview Financials Valuation SEC Filings Company Website

2020 Q3 Form 10-Q Financial Statement

#000070717920000191 Filed on October 28, 2020

Income Statement

Concept	2020 Q3	2020 Q1	2019 Q4
Revenue	$160.1M	$168.0M	$176.6M
YoY Change	-13.86%	-6.1%	0.75%
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	$6.800M	$8.600M	$10.60M
YoY Change	0.0%	34.38%	3.92%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$14.51M	$24.23M	$27.65M
YoY Change	-55.69%	-23.98%	-4.67%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$90.10M	$25.58M	$60.62M
YoY Change	8.51%	-63.13%	19.51%
Income Tax	$12.15M	$2.939M	$11.43M
% Of Pretax Income	13.49%	11.49%	18.86%
Net Earnings	$77.94M	$22.64M	$49.19M
YoY Change	11.7%	-59.77%	3.55%
Net Earnings / Revenue	48.69%	13.48%	27.86%
Basic Earnings Per Share	$0.47	$0.13	$0.29
Diluted Earnings Per Share	$0.47	$0.13	$0.29
COMMON SHARES
Basic Shares Outstanding	164.8M shares	167.7M shares	169.2M shares
Diluted Shares Outstanding	165.4M shares	168.4M shares	170.2M shares

Balance Sheet

Concept	2020 Q3	2020 Q1	2019 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$330.8M	$343.2M	$276.3M
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	$463.3M	$462.4M	$490.9M
YoY Change	-5.86%	-5.68%	1.03%
Goodwill	$1.037B	$1.037B	$1.037B
YoY Change	0.0%	0.07%	0.07%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets		$18.00M	$30.00M
YoY Change		-71.88%	-66.67%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$22.46B	$20.74B	$20.41B
YoY Change	9.89%	3.27%	3.46%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$307.0M	$332.0M	$249.0M
YoY Change	-1.29%	31.23%	37.57%
Deferred Revenue
YoY Change
Short-Term Debt	$400.0M	$879.0M	$678.0M
YoY Change	-30.8%	31.59%	7.28%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$307.0M	$332.0M	$249.0M
YoY Change	-1.29%	31.23%	37.57%
LONG-TERM LIABILITIES
Long-Term Debt	$238.0M	$236.0M	$244.0M
YoY Change	-5.56%	-6.35%	-1.61%
Other Long-Term Liabilities	$12.00M	$65.00M	$35.00M
YoY Change	-70.0%	132.14%	45.83%
Total Long-Term Liabilities	$250.0M	$301.0M	$279.0M
YoY Change	-14.38%	7.5%	2.57%
TOTAL LIABILITIES
Total Short-Term Liabilities	$307.0M	$332.0M	$249.0M
Total Long-Term Liabilities	$250.0M	$301.0M	$279.0M
Total Liabilities	$19.54B	$17.92B	$17.56B
YoY Change	10.98%	3.38%	3.05%
SHAREHOLDERS EQUITY
Retained Earnings	$733.0M	$682.2M	$682.2M
YoY Change		20.25%	29.28%
Common Stock	$2.039B	$2.035B	$2.114B
YoY Change		-6.72%	-4.2%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$2.921B	$2.823B	$2.852B
YoY Change
Total Liabilities & Shareholders Equity	$22.46B	$20.74B	$20.41B
YoY Change	9.89%	3.27%	3.46%

Cashflow Statement

Concept	2020 Q3	2020 Q1	2019 Q4
OPERATING ACTIVITIES
Net Income	$77.94M	$22.64M	$49.19M
YoY Change	11.7%	-59.77%	3.55%
Depreciation, Depletion And Amortization	$6.800M	$8.600M	$10.60M
YoY Change	0.0%	34.38%	3.92%
Cash From Operating Activities	$135.3M	-$21.13M	$97.10M
YoY Change	113.74%	-164.02%	72.78%
INVESTING ACTIVITIES
Capital Expenditures	-$8.200M	$7.938M	-$6.300M
YoY Change	15.49%	-32.06%	-27.59%
Acquisitions
YoY Change
Other Investing Activities	-$363.3M	-$44.10M	-$225.6M
YoY Change	407.4%	-75.99%	50.7%
Cash From Investing Activities	-$371.5M	-$52.08M	-$231.9M
YoY Change	372.05%	-73.34%	46.4%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$81.67M
YoY Change		200.63%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	256.5M	$140.1M	-9.100M
YoY Change	90.56%	-16.77%	-106.86%
NET CHANGE
Cash From Operating Activities	135.3M	-$21.13M	97.10M
Cash From Investing Activities	-371.5M	-$52.08M	-231.9M
Cash From Financing Activities	256.5M	$140.1M	-9.100M
Net Change In Cash	20.30M	$66.84M	-143.9M
YoY Change	-82.97%	1023.17%	-573.36%
FREE CASH FLOW
Cash From Operating Activities	$135.3M	-$21.13M	$97.10M
Capital Expenditures	-$8.200M	$7.938M	-$6.300M
Free Cash Flow	$143.5M	-$29.07M	$103.4M
YoY Change	103.84%	-236.31%	59.32%

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	Q3
	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
CY2020Q3	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	2020-09-30
	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	27604000	USD
CY2020Q3	onb	Fees And Commissions Depositor Account FeesAndCommissionsDepositorAccount	8698000	USD
CY2019Q3	onb	Fees And Commissions Depositor Account FeesAndCommissionsDepositorAccount	11860000	USD
	onb	Fees And Commissions Depositor Account FeesAndCommissionsDepositorAccount	26357000	USD
	onb	Fees And Commissions Depositor Account FeesAndCommissionsDepositorAccount	34201000	USD
CY2020Q3	onb	Debit Card And Atm Fees DebitCardAndAtmFees	5276000	USD
CY2019Q3	onb	Debit Card And Atm Fees DebitCardAndAtmFees	5370000	USD
	onb	Debit Card And Atm Fees DebitCardAndAtmFees	15106000	USD
	onb	Debit Card And Atm Fees DebitCardAndAtmFees	16292000	USD
CY2020Q3	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	18110000	USD
CY2019Q3	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	8850000	USD
	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	46542000	USD
	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	20996000	USD
CY2020Q3	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	5351000	USD
CY2019Q3	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	5244000	USD
	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	16070000	USD
	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	16106000	USD
CY2020Q3	onb	Capital Markets Income CapitalMarketsIncome	5428000	USD
CY2019Q3	onb	Capital Markets Income CapitalMarketsIncome	4560000	USD
	onb	Capital Markets Income CapitalMarketsIncome	15935000	USD
	onb	Capital Markets Income CapitalMarketsIncome	10227000	USD
CY2020Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	2830000	USD
CY2019Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	2703000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	8878000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	8602000	USD
CY2020Q3	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	4921000	USD
CY2019Q3	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	424000	USD
	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	10606000	USD
	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	1486000	USD
CY2020Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	4906000	USD
CY2019Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	5790000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	13681000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	16077000	USD
CY2020Q3	us-gaap	Noninterest Income NoninterestIncome	64759000	USD
CY2019Q3	us-gaap	Noninterest Income NoninterestIncome	53961000	USD
	us-gaap	Noninterest Income NoninterestIncome	180722000	USD
	us-gaap	Noninterest Income NoninterestIncome	151591000	USD
CY2020Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	69860000	USD
CY2019Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	71729000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	215589000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	214478000	USD
CY2020Q3	us-gaap	Occupancy Net OccupancyNet	13930000	USD
CY2019Q3	us-gaap	Occupancy Net OccupancyNet	11934000	USD
	us-gaap	Occupancy Net OccupancyNet	42308000	USD
	us-gaap	Occupancy Net OccupancyNet	41071000	USD
CY2020Q3	us-gaap	Equipment Expense EquipmentExpense	3754000	USD
CY2019Q3	us-gaap	Equipment Expense EquipmentExpense	3954000	USD
	us-gaap	Equipment Expense EquipmentExpense	12912000	USD
	us-gaap	Equipment Expense EquipmentExpense	12945000	USD
CY2020Q3	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	2140000	USD
CY2019Q3	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	4105000	USD
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	7632000	USD
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	12267000	USD
CY2020Q3	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	9628000	USD
CY2019Q3	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	8961000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	28724000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	28509000	USD
CY2020Q3	us-gaap	Communication Communication	2241000	USD
CY2019Q3	us-gaap	Communication Communication	2349000	USD
	us-gaap	Communication Communication	7335000	USD
	us-gaap	Communication Communication	8252000	USD
CY2020Q3	us-gaap	Professional Fees ProfessionalFees	3083000	USD
CY2019Q3	us-gaap	Professional Fees ProfessionalFees	5037000	USD
	us-gaap	Professional Fees ProfessionalFees	10921000	USD
	us-gaap	Professional Fees ProfessionalFees	12868000	USD
CY2020Q3	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	1319000	USD
CY2019Q3	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	960000	USD
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	4942000	USD
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	4501000	USD
CY2020Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3459000	USD
CY2019Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4168000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	10847000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	12965000	USD
CY2020Q3	us-gaap	Income Loss From Affordable Housing Projects Equity Method Investments IncomeLossFromAffordableHousingProjectsEquityMethodInvestments	-3115000	USD
CY2019Q3	us-gaap	Income Loss From Affordable Housing Projects Equity Method Investments IncomeLossFromAffordableHousingProjectsEquityMethodInvestments	-1211000	USD
	us-gaap	Income Loss From Affordable Housing Projects Equity Method Investments IncomeLossFromAffordableHousingProjectsEquityMethodInvestments	-8917000	USD
	us-gaap	Income Loss From Affordable Housing Projects Equity Method Investments IncomeLossFromAffordableHousingProjectsEquityMethodInvestments	-2039000	USD
CY2020Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	7705000	USD
CY2019Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	8177000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	48972000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	23849000	USD
CY2020Q3	us-gaap	Noninterest Expense NoninterestExpense	120234000	USD
CY2019Q3	us-gaap	Noninterest Expense NoninterestExpense	122585000	USD
	us-gaap	Noninterest Expense NoninterestExpense	399099000	USD
	us-gaap	Noninterest Expense NoninterestExpense	373744000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	90098000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	83035000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	177143000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	229738000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	12154000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13254000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	24854000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	40717000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	77944000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	69781000	USD
	us-gaap	Net Income Loss NetIncomeLoss	152289000	USD
	us-gaap	Net Income Loss NetIncomeLoss	189021000	USD
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.47
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.41
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.92
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.10
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.47
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.41
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.92
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.09
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	164773000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	170746000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	165748000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	172807000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	165419000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	171551000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	166370000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	173527000	shares
CY2020Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.14
CY2019Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.13
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.42
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.39
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	77944000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	69781000	USD
	us-gaap	Net Income Loss NetIncomeLoss	152289000	USD
	us-gaap	Net Income Loss NetIncomeLoss	189021000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	6599000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	19567000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	126281000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	133081000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	4921000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	424000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	10606000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	1486000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	281000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	3602000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	25598000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	30005000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	1397000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	15541000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	90077000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	101590000	USD
CY2020Q3	us-gaap	Other Than Temporary Impairment Losses Investments Reclassification Adjustment Of Noncredit Portion Included In Net Income Heldtomaturity Securities Before Tax OtherThanTemporaryImpairmentLossesInvestmentsReclassificationAdjustmentOfNoncreditPortionIncludedInNetIncomeHeldtomaturitySecuritiesBeforeTax	0	USD
CY2019Q3	us-gaap	Other Than Temporary Impairment Losses Investments Reclassification Adjustment Of Noncredit Portion Included In Net Income Heldtomaturity Securities Before Tax OtherThanTemporaryImpairmentLossesInvestmentsReclassificationAdjustmentOfNoncreditPortionIncludedInNetIncomeHeldtomaturitySecuritiesBeforeTax	1384000	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	2405000	USD
CY2020Q3	us-gaap	Other Comprehensive Loss Held To Maturity Security Otti After Adjustments Tax OtherComprehensiveLossHeldToMaturitySecurityOttiAfterAdjustmentsTax	0	USD
CY2019Q3	us-gaap	Other Comprehensive Loss Held To Maturity Security Otti After Adjustments Tax OtherComprehensiveLossHeldToMaturitySecurityOttiAfterAdjustmentsTax	-392000	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	-627000	USD
CY2020Q3	us-gaap	Other Comprehensive Loss Held To Maturity Security Otti After Tax And Adjustments OtherComprehensiveLossHeldToMaturitySecurityOttiAfterTaxAndAdjustments	0	USD
CY2019Q3	us-gaap	Other Comprehensive Loss Held To Maturity Security Otti After Tax And Adjustments OtherComprehensiveLossHeldToMaturitySecurityOttiAfterTaxAndAdjustments	-992000	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	-1778000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-11000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-73000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	7546000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	479000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	1550000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	21000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	3651000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	412000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	-384000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	-23000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	957000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	17000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-1177000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-71000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	2938000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	50000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-28000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-20000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-82000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-61000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-7000	USD
CY2019Q3	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	-20000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-15000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-21000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-15000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-62000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-46000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	241000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	16477000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	93077000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	103464000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	78185000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	86258000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	245366000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	292485000	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
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	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.13
CY2019Q2	us-gaap	Dividends Common Stock DividendsCommonStock	22476000	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
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	69781000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	16477000	USD
CY2019Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.13
CY2019Q3	us-gaap	Dividends Common Stock DividendsCommonStock	22136000	USD
CY2019Q3	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	141000	USD
CY2019Q3	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	37072000	USD
CY2019Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2200000	USD
CY2019Q3	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	0	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	2832530000	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
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	77944000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	241000	USD
CY2020Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.14
CY2020Q3	us-gaap	Dividends Common Stock DividendsCommonStock	23147000	USD
CY2020Q3	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	136000	USD
CY2020Q3	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	14000	USD
CY2020Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1734000	USD
CY2020Q3	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	0	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	2921149000	USD
	us-gaap	Net Income Loss NetIncomeLoss	152289000	USD
	us-gaap	Net Income Loss NetIncomeLoss	189021000	USD
	us-gaap	Depreciation Depreciation	21807000	USD
	us-gaap	Depreciation Depreciation	19980000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	10847000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	12965000	USD
	us-gaap	Income Loss From Affordable Housing Projects Equity Method Investments IncomeLossFromAffordableHousingProjectsEquityMethodInvestments	-8917000	USD
	us-gaap	Income Loss From Affordable Housing Projects Equity Method Investments IncomeLossFromAffordableHousingProjectsEquityMethodInvestments	-2039000	USD
	us-gaap	Investment Income Net Amortization Of Discount And Premium InvestmentIncomeNetAmortizationOfDiscountAndPremium	-14664000	USD
	us-gaap	Investment Income Net Amortization Of Discount And Premium InvestmentIncomeNetAmortizationOfDiscountAndPremium	-13199000	USD
	onb	Net Accretion Of Premiums And Discounts From Acquired Loans NetAccretionOfPremiumsAndDiscountsFromAcquiredLoans	17883000	USD
	onb	Net Accretion Of Premiums And Discounts From Acquired Loans NetAccretionOfPremiumsAndDiscountsFromAcquiredLoans	33465000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	5962000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	5946000	USD
	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	747000	USD
	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	1057000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	39495000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	3483000	USD
	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	10606000	USD
	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	1486000	USD
	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	8636000	USD
	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	3815000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	8878000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	8602000	USD
	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	1114932000	USD
	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	564457000	USD
	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	1099258000	USD
	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	528739000	USD
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-2071000	USD
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-8717000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	109291000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	1695000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	764000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-32816000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	85101000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	136696000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	1859755000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	1713799000	USD
	us-gaap	Payments To Acquire Restricted Investments PaymentsToAcquireRestrictedInvestments	10025000	USD
	us-gaap	Payments To Acquire Restricted Investments PaymentsToAcquireRestrictedInvestments	21142000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	1475609000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	810397000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	296075000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	295615000	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	99913000	USD
	us-gaap	Proceeds From Sale Of Restricted Investments ProceedsFromSaleOfRestrictedInvestments	4672000	USD
	us-gaap	Proceeds From Sale Of Restricted Investments ProceedsFromSaleOfRestrictedInvestments	21000	USD
	us-gaap	Proceeds From Sale Of Trading Securities Heldforinvestment ProceedsFromSaleOfTradingSecuritiesHeldforinvestment	39218000	USD
	us-gaap	Proceeds From Sale Of Trading Securities Heldforinvestment ProceedsFromSaleOfTradingSecuritiesHeldforinvestment	130000	USD
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	1756697000	USD
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	-257675000	USD
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	1870000	USD
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	5716000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	7014000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	3038000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	26865000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	31095000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1828884000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-293531000	USD
	us-gaap	Net Change Interest Bearing Deposits Domestic NetChangeInterestBearingDepositsDomestic	1953097000	USD
	us-gaap	Net Change Interest Bearing Deposits Domestic NetChangeInterestBearingDepositsDomestic	98403000	USD
	us-gaap	Increase Decrease In Federal Funds Purchased IncreaseDecreaseInFederalFundsPurchased	349155000	USD
	us-gaap	Increase Decrease In Federal Funds Purchased IncreaseDecreaseInFederalFundsPurchased	29546000	USD
	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	71359000	USD
	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	-24743000	USD
	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	-429000	USD
	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	3744000	USD
	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	550004000	USD
	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	375999000	USD
	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	825000000	USD
	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	750000000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	69795000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	67424000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	82309000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	95214000	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	432000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	419000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1798196000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	259920000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	54413000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	103085000	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
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	330750000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	420250000	USD
	us-gaap	Interest Paid Net InterestPaidNet	59037000	USD
	us-gaap	Interest Paid Net InterestPaidNet	101224000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	15836000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2954000	USD
	onb	Investment Securities Purchased But Not Settled InvestmentSecuritiesPurchasedButNotSettled	50317000	USD
	onb	Investment Securities Purchased But Not Settled InvestmentSecuritiesPurchasedButNotSettled	64924000	USD
	onb	Net Reduction In Operating Lease Right Of Use Asset Modifications NetReductionInOperatingLeaseRightOfUseAssetModifications	1133000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	117853000	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
CY2020Q3	onb	Financing Receivable Number Of Distinct Loan Portfolios FinancingReceivableNumberOfDistinctLoanPortfolios	7	portfolio
CY2020Q3	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
CY2020Q3	onb	Financing Receivable Number Of Loan Portfolios FinancingReceivableNumberOfLoanPortfolios	4	portfolio
CY2020Q3	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
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	77944000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	69781000	USD
	us-gaap	Net Income Loss NetIncomeLoss	152289000	USD
	us-gaap	Net Income Loss NetIncomeLoss	189021000	USD
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	164773000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	170746000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	165748000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	172807000	shares
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.47
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.41
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.92
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.10
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	77944000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	69781000	USD
	us-gaap	Net Income Loss NetIncomeLoss	152289000	USD
	us-gaap	Net Income Loss NetIncomeLoss	189021000	USD
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	164773000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	170746000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	165748000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	172807000	shares
CY2020Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	611000	shares
CY2019Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	761000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	586000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	672000	shares
CY2020Q3	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	35000	shares
CY2019Q3	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	44000	shares
	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	36000	shares
	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	48000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	165419000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	171551000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	166370000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	173527000	shares
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.47
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.41
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.92
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.09
CY2020Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	5413977000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	197229000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	9672000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	5601534000	USD
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
CY2020Q3	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	39637000	USD
CY2019Q3	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	27983000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	296075000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	295615000	USD
CY2020Q3	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables Categorized As Available For Sale ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivablesCategorizedAsAvailableForSale	82410000	USD
CY2019Q3	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables Categorized As Available For Sale ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivablesCategorizedAsAvailableForSale	316361000	USD
	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables Categorized As Available For Sale ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivablesCategorizedAsAvailableForSale	388145000	USD
	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables Categorized As Available For Sale ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivablesCategorizedAsAvailableForSale	378476000	USD
CY2020Q3	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	122047000	USD
CY2019Q3	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	344344000	USD
	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	684220000	USD
	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	674091000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	4942000	USD
CY2019Q3	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	340000	USD
	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	11082000	USD
	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	3443000	USD
CY2020Q3	onb	Realized Gains On Calls Of Available For Sale Securities RealizedGainsOnCallsOfAvailableForSaleSecurities	10000	USD
CY2019Q3	onb	Realized Gains On Calls Of Available For Sale Securities RealizedGainsOnCallsOfAvailableForSaleSecurities	86000	USD
	onb	Realized Gains On Calls Of Available For Sale Securities RealizedGainsOnCallsOfAvailableForSaleSecurities	50000	USD
	onb	Realized Gains On Calls Of Available For Sale Securities RealizedGainsOnCallsOfAvailableForSaleSecurities	89000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	30000	USD
CY2019Q3	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	2000	USD
	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	500000	USD
	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	2017000	USD
CY2020Q3	onb	Realized Loss On Calls Of Available For Sale Securities RealizedLossOnCallsOfAvailableForSaleSecurities	1000	USD
CY2019Q3	onb	Realized Loss On Calls Of Available For Sale Securities RealizedLossOnCallsOfAvailableForSaleSecurities	0	USD
	onb	Realized Loss On Calls Of Available For Sale Securities RealizedLossOnCallsOfAvailableForSaleSecurities	26000	USD
	onb	Realized Loss On Calls Of Available For Sale Securities RealizedLossOnCallsOfAvailableForSaleSecurities	29000	USD
CY2020Q3	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	4921000	USD
CY2019Q3	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	424000	USD
	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	10606000	USD
	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	1486000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	479460000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	488426000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Maturity Within One Year Weighted Average Yield DebtSecuritiesAvailableForSaleMaturityWithinOneYearWeightedAverageYield	0.0249
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	2808889000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	2909519000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Maturity After One Through Five Years Weighted Average Yield DebtSecuritiesAvailableForSaleMaturityAfterOneThroughFiveYearsWeightedAverageYield	0.0238
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	750252000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	772598000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Maturity After Five Through Ten Years Weighted Average Yield DebtSecuritiesAvailableForSaleMaturityAfterFiveThroughTenYearsWeightedAverageYield	0.0250
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	1375376000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	1430991000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Maturity After10 Years Weighted Average Yield DebtSecuritiesAvailableForSaleMaturityAfter10YearsWeightedAverageYield	0.0305
CY2020Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	5413977000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	5601534000	USD
CY2020Q3	onb	Available For Sale Securities Debt Maturities Weighted Average Yield AvailableForSaleSecuritiesDebtMaturitiesWeightedAverageYield	0.0258
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	606890000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	2701000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	31658000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	6971000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	638548000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	9672000	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
CY2020Q3	onb	Debt Securities Available For Sale Accrued Interest After Allowance For Credit Loss DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss	22400000	USD
	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0	USD
CY2020Q2	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	11026000	USD
CY2019Q4	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	2656000	USD
CY2020Q3	onb	Number Of Securities In Security Portfolio NumberOfSecuritiesInSecurityPortfolio	1854	security
CY2020Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	103	security
CY2020Q3	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	2500000	USD
CY2019Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	6800000	USD
CY2020Q3	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	500000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	1300000	USD
CY2019Q3	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	200000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	400000	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
CY2020Q3	onb	Financing Receivable Number Of Loan Portfolios FinancingReceivableNumberOfLoanPortfolios	4	portfolio
CY2020Q3	onb	Financing Receivable Number Of Loan Segments FinancingReceivableNumberOfLoanSegments	7	portfolio
	onb	Non Accrual Loans Maximum Past Due Period NonAccrualLoansMaximumPastDuePeriod	P90D
	onb	Loan Charge Off To Be Recorded Minimum Period LoanChargeOffToBeRecordedMinimumPeriod	P120D
CY2020Q3	onb	Interest Receivable Loans InterestReceivableLoans	59500000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Loss Writeoff After Recovery FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery	-3000000.0	USD
CY2020Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	128394000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	4169000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	7163000	USD
CY2020Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	0	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	131388000	USD
CY2020Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	54619000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	14846000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	10773000	USD
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	39495000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	131388000	USD
CY2020Q3	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	11026000	USD
CY2020Q2	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	11026000	USD
CY2020Q3	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	0	USD
	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	3821000	USD
CY2020Q3	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
CY2020Q2	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	125546000	USD
CY2020Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	137611000	USD
CY2020Q3	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	35203000	USD
CY2020Q3	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	90000	USD
CY2020Q3	onb	Loan Participations LoanParticipations	874000000.0	USD
CY2020Q3	onb	Loan Participations Sold LoanParticipationsSold	392900000	USD
CY2020Q3	onb	Loan Participations Retained LoanParticipationsRetained	481100000	USD
	onb	Troubled Debt Restructuring Modified Term TroubledDebtRestructuringModifiedTerm	P6M
	onb	Loan Charge Off To Be Recorded Maximum Period LoanChargeOffToBeRecordedMaximumPeriod	P180D
CY2020Q2	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	27609000	USD
CY2020Q3	onb	Financing Receivable Troubled Debt Restructuring Write Offs Recoveries FinancingReceivableTroubledDebtRestructuringWriteOffsRecoveries	-3259000	USD
CY2020Q3	onb	Financing Receivable Troubled Debt Restructuring Payments Disbursements FinancingReceivableTroubledDebtRestructuringPaymentsDisbursements	7343000	USD
CY2020Q3	onb	Financing Receivable Troubled Debt Restructuring Additions FinancingReceivableTroubledDebtRestructuringAdditions	5907000	USD
CY2020Q3	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	29432000	USD
CY2019Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	31738000	USD
	onb	Financing Receivable Troubled Debt Restructuring Write Offs Recoveries FinancingReceivableTroubledDebtRestructuringWriteOffsRecoveries	-1351000	USD
	onb	Financing Receivable Troubled Debt Restructuring Payments Disbursements FinancingReceivableTroubledDebtRestructuringPaymentsDisbursements	9564000	USD
	onb	Financing Receivable Troubled Debt Restructuring Additions FinancingReceivableTroubledDebtRestructuringAdditions	5907000	USD
CY2020Q3	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	29432000	USD
CY2020Q3	onb	Financing Receivable Troubled Debt Restructurings Included With Non Accrual Loan FinancingReceivableTroubledDebtRestructuringsIncludedWithNonAccrualLoan	7700000	USD
CY2019Q4	onb	Financing Receivable Troubled Debt Restructurings Included With Non Accrual Loan FinancingReceivableTroubledDebtRestructuringsIncludedWithNonAccrualLoan	13800000	USD
CY2020Q3	onb	Financing Receivable Troubled Debt Restructurings Specific Reserves FinancingReceivableTroubledDebtRestructuringsSpecificReserves	300000	USD
CY2019Q4	onb	Financing Receivable Troubled Debt Restructurings Specific Reserves FinancingReceivableTroubledDebtRestructuringsSpecificReserves	900000	USD
CY2020Q3	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	800000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	2300000	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	56910000	USD
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	1	loan
	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	5907000	USD
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	5907000	USD
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	14	loan
	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	21132000	USD
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	21132000	USD
	onb	Loan To Be Considered As Payment Default In Period LoanToBeConsideredAsPaymentDefaultInPeriod	P90D
CY2019Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	56292000	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	2716000	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	1897000	USD
CY2019Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	1437000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	55461000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	8485000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	6451000	USD
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	3483000	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	56910000	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
CY2019Q3	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	114193000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	121615000	USD
CY2019Q2	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	43831000	USD
CY2018Q4	us-gaap	Other Real Estate OtherRealEstate	3232000	USD
CY2020Q3	us-gaap	Real Estate Other Additions RealEstateOtherAdditions	368000	USD
CY2019Q3	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	40403000	USD
CY2018Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	43710000	USD
CY2019Q3	onb	Financing Receivable Troubled Debt Restructuring Write Offs Recoveries FinancingReceivableTroubledDebtRestructuringWriteOffsRecoveries	-32000	USD
CY2019Q3	onb	Financing Receivable Troubled Debt Restructuring Payments Disbursements FinancingReceivableTroubledDebtRestructuringPaymentsDisbursements	4547000	USD
CY2019Q3	onb	Financing Receivable Troubled Debt Restructuring Additions FinancingReceivableTroubledDebtRestructuringAdditions	1087000	USD
	onb	Financing Receivable Troubled Debt Restructuring Write Offs Recoveries FinancingReceivableTroubledDebtRestructuringWriteOffsRecoveries	139000	USD
	onb	Financing Receivable Troubled Debt Restructuring Payments Disbursements FinancingReceivableTroubledDebtRestructuringPaymentsDisbursements	24300000	USD
	onb	Financing Receivable Troubled Debt Restructuring Additions FinancingReceivableTroubledDebtRestructuringAdditions	21132000	USD
CY2019Q3	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	40403000	USD
CY2020Q2	us-gaap	Other Real Estate OtherRealEstate	1786000	USD
CY2019Q2	us-gaap	Other Real Estate OtherRealEstate	2819000	USD
CY2019Q4	us-gaap	Other Real Estate OtherRealEstate	2169000	USD
CY2019Q3	us-gaap	Real Estate Other Additions RealEstateOtherAdditions	411000	USD
	us-gaap	Real Estate Other Additions RealEstateOtherAdditions	572000	USD
	us-gaap	Real Estate Other Additions RealEstateOtherAdditions	1084000	USD
CY2020Q3	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	843000	USD
CY2019Q3	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	271000	USD
	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	1267000	USD
	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	1248000	USD
CY2020Q3	us-gaap	Real Estate Other Deductions RealEstateOtherDeductions	63000	USD
CY2019Q3	us-gaap	Real Estate Other Deductions RealEstateOtherDeductions	18000	USD
	us-gaap	Real Estate Other Deductions RealEstateOtherDeductions	226000	USD
	us-gaap	Real Estate Other Deductions RealEstateOtherDeductions	127000	USD
CY2020Q3	us-gaap	Other Real Estate OtherRealEstate	1248000	USD
CY2019Q3	us-gaap	Other Real Estate OtherRealEstate	2941000	USD
CY2020Q3	us-gaap	Other Real Estate OtherRealEstate	1248000	USD
CY2019Q3	us-gaap	Other Real Estate OtherRealEstate	2941000	USD
CY2020Q3	us-gaap	Foreclosed Assets ForeclosedAssets	200000	USD
CY2019Q3	us-gaap	Foreclosed Assets ForeclosedAssets	500000	USD
CY2020Q3	us-gaap	Depreciation Depreciation	6800000	USD
CY2020Q3	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	800000	USD
CY2019Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	500000	USD
CY2020Q3	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	2900000	USD
CY2019Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	3700000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	597628000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	617284000	USD
CY2020Q3	onb	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	134375000	USD
CY2019Q4	onb	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	126359000	USD
CY2020Q3	onb	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	463253000	USD
CY2019Q4	onb	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	490925000	USD
	us-gaap	Depreciation Depreciation	21800000	USD
CY2019Q3	us-gaap	Depreciation Depreciation	6800000	USD
	us-gaap	Depreciation Depreciation	20000000.0	USD
CY2020Q3	us-gaap	Lease Cost LeaseCost	4232000	USD
CY2019Q3	us-gaap	Lease Cost LeaseCost	4334000	USD
	us-gaap	Lease Cost LeaseCost	20408000	USD
	us-gaap	Lease Cost LeaseCost	13148000	USD
CY2020Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	77482000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	95477000	USD
CY2020Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	88552000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	99500000	USD
CY2020Q3	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	11662000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	7170000	USD
CY2020Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	12062000	USD
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	7406000	USD
CY2020Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P10Y7M6D
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P10Y7M6D
CY2020Q3	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P10Y6M
CY2019Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P11Y3M18D
CY2020Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0340
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0345
CY2020Q3	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0345
CY2019Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0443
	us-gaap	Operating Lease Payments OperatingLeasePayments	12194000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	13201000	USD
	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	267000	USD
	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	241000	USD
	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	569000	USD
	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	344000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	3735000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Remainder Of Fiscal Year FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear	346000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	14344000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	1394000	USD
CY2020Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	12062000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	13277000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	1412000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	9244000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	1438000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	8073000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	1444000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	57791000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	8442000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	106464000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	14476000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	17912000	USD
CY2020Q3	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	2414000	USD
CY2020Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	88552000	USD
CY2020Q3	us-gaap	Lessor Operating Lease Payments To Be Received Remainder Of Fiscal Year LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear	628000	USD
CY2020Q3	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	2327000	USD
CY2020Q3	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	1878000	USD
CY2020Q3	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	1523000	USD
CY2020Q3	us-gaap	Lessor Operating Lease Payments To Be Received Five Years LessorOperatingLeasePaymentsToBeReceivedFiveYears	1409000	USD
CY2020Q3	us-gaap	Lessor Operating Lease Payments To Be Received Thereafter LessorOperatingLeasePaymentsToBeReceivedThereafter	2520000	USD
CY2020Q3	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	10285000	USD
CY2020Q2	us-gaap	Goodwill Goodwill	1036994000	USD
CY2019Q2	us-gaap	Goodwill Goodwill	1036258000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	1036994000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	1036258000	USD
CY2020Q3	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	USD
CY2019Q3	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	736000	USD
	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	USD
	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	736000	USD
CY2020Q3	us-gaap	Goodwill Goodwill	1036994000	USD
CY2019Q3	us-gaap	Goodwill Goodwill	1036994000	USD
CY2020Q3	us-gaap	Goodwill Goodwill	1036994000	USD
CY2019Q3	us-gaap	Goodwill Goodwill	1036994000	USD
CY2020Q3	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	129270000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	80012000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	49258000	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
CY2020Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3500000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	10800000	USD
CY2019Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4200000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	13000000.0	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear	3244000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	11336000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	9014000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	7053000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	5645000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	12966000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	49258000	USD
CY2020Q3	us-gaap	Servicing Asset ServicingAsset	25500000	USD
CY2020Q3	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	2885000	USD
CY2019Q4	us-gaap	Servicing Asset ServicingAsset	25400000	USD
CY2020Q3	onb	Principal Balance Of Loans Serviced For Others PrincipalBalanceOfLoansServicedForOthers	3619000000	USD
CY2019Q4	onb	Principal Balance Of Loans Serviced For Others PrincipalBalanceOfLoansServicedForOthers	3445000000	USD
CY2020Q3	us-gaap	Escrow Deposit EscrowDeposit	45200000	USD
CY2019Q4	us-gaap	Escrow Deposit EscrowDeposit	12700000	USD
CY2020Q2	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	26288000	USD
CY2019Q2	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	24364000	USD
CY2019Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	25399000	USD
CY2018Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	24512000	USD
CY2020Q3	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	4446000	USD
CY2019Q3	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	2097000	USD
	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	9849000	USD
	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	4026000	USD
CY2019Q3	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	1717000	USD
	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	7399000	USD
	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	3794000	USD
CY2020Q3	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	27849000	USD
CY2019Q3	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	24744000	USD
CY2020Q3	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	27849000	USD
CY2019Q3	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	24744000	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
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
CY2020Q3	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Provisions Recoveries ValuationAllowanceForImpairmentOfRecognizedServicingAssetsProvisionsRecoveries	95000	USD
CY2019Q3	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Provisions Recoveries ValuationAllowanceForImpairmentOfRecognizedServicingAssetsProvisionsRecoveries	89000	USD
	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Provisions Recoveries ValuationAllowanceForImpairmentOfRecognizedServicingAssetsProvisionsRecoveries	2317000	USD
	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Provisions Recoveries ValuationAllowanceForImpairmentOfRecognizedServicingAssetsProvisionsRecoveries	106000	USD
CY2020Q3	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	2348000	USD
CY2019Q3	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	121000	USD
CY2019Q4	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	25926000	USD
CY2020Q3	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	2348000	USD
CY2019Q3	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	121000	USD
CY2020Q3	us-gaap	Servicing Asset ServicingAsset	25501000	USD
CY2019Q3	us-gaap	Servicing Asset ServicingAsset	24623000	USD
CY2020Q3	us-gaap	Servicing Asset ServicingAsset	25501000	USD
CY2019Q3	us-gaap	Servicing Asset ServicingAsset	24623000	USD
CY2020Q3	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	25600000	USD
	onb	Fair Value Inputs Discount Rate1 FairValueInputsDiscountRate1	0.09
CY2020Q3	onb	Fair Value Inputs Weighted Average Prepayment Speed FairValueInputsWeightedAveragePrepaymentSpeed	0.15
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
CY2020Q3	onb	Investments In Qualified Affordable Housing Projects InvestmentsInQualifiedAffordableHousingProjects	65862000	USD
CY2020Q3	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	32747000	USD
CY2019Q4	onb	Investments In Qualified Affordable Housing Projects InvestmentsInQualifiedAffordableHousingProjects	59661000	USD
	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	5167000	USD
CY2020Q3	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	3891000	USD
CY2020Q3	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	4756000	USD
CY2019Q3	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	2004000	USD
CY2019Q3	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	2306000	USD
	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	11246000	USD
	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	10214000	USD
	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	4415000	USD
CY2020Q3	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	399141000	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	327782000	USD
CY2019Q3	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	337551000	USD
	us-gaap	Shortterm Debt Average Outstanding Amount ShorttermDebtAverageOutstandingAmount	355039000	USD
	us-gaap	Shortterm Debt Average Outstanding Amount ShorttermDebtAverageOutstandingAmount	344294000	USD
	us-gaap	Shortterm Debt Maximum Monthend Outstanding Amount ShorttermDebtMaximumMonthendOutstandingAmount	399141000	USD
	us-gaap	Shortterm Debt Maximum Monthend Outstanding Amount ShorttermDebtMaximumMonthendOutstandingAmount	367884000	USD
	us-gaap	Short Term Debt Weighted Average Interest Rate Over Time ShortTermDebtWeightedAverageInterestRateOverTime	0.0027
	us-gaap	Short Term Debt Weighted Average Interest Rate Over Time ShortTermDebtWeightedAverageInterestRateOverTime	0.0080
CY2020Q3	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0012
CY2019Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0053
CY2019Q3	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0074
CY2020Q3	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	399141000	USD
	onb	Percentage Pledged Securities Of Repurchase Agreements Outstanding Balance PercentagePledgedSecuritiesOfRepurchaseAgreementsOutstandingBalance	1.06
CY2020Q3	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	2075660000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	1800664000	USD
	onb	Asc815 Fair Value Hedge And Other Basis Adjustments Asc815FairValueHedgeAndOtherBasisAdjustments	11988000	USD
CY2019	onb	Asc815 Fair Value Hedge And Other Basis Adjustments Asc815FairValueHedgeAndOtherBasisAdjustments	22183000	USD
CY2020Q3	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	2087648000	USD
CY2019Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	1822847000	USD
CY2020Q3	us-gaap	Federal Home Loan Bank Advances Activity For Year Average Interest Rate At Period End FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateAtPeriodEnd	0.0150
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Activity For Year Average Interest Rate At Period End FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateAtPeriodEnd	0.0219
CY2020Q3	onb	Advances From Federal Home Loan Banks Modifications Amount AdvancesFromFederalHomeLoanBanksModificationsAmount	300000000.0	USD
CY2020Q3	onb	Advances From Federal Home Loan Banks Modifications Number Of Contracts AdvancesFromFederalHomeLoanBanksModificationsNumberOfContracts	2	advance
CY2020Q2	us-gaap	Federal Home Loan Bank Advances Weighted Average Interest Rate FederalHomeLoanBankAdvancesWeightedAverageInterestRate	0.0178
CY2020Q3	us-gaap	Federal Home Loan Bank Advances Weighted Average Interest Rate FederalHomeLoanBankAdvancesWeightedAverageInterestRate	0.0090
CY2020Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due In Remainder Of Fiscal Year FederalHomeLoanBankAdvancesMaturitiesSummaryDueInRemainderOfFiscalYear	150000000	USD
CY2020Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From One To Two Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate	20000000	USD
CY2020Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Two To Three Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate	30500000	USD
CY2020Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Three To Four Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate	160000	USD
CY2020Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Four To Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate	125000000	USD
CY2020Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due After Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate	1750000000	USD
	onb	Asc815 Fair Value Hedge And Other Basis Adjustments Asc815FairValueHedgeAndOtherBasisAdjustments	11988000	USD
CY2020Q3	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	2087648000	USD
CY2020Q3	us-gaap	Other Borrowings OtherBorrowings	237683000	USD
CY2019Q4	us-gaap	Other Borrowings OtherBorrowings	243685000	USD
CY2020Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	250000	USD
CY2020Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	1025000	USD
CY2020Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	1073000	USD
CY2020Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	1132000	USD
CY2020Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	176170000	USD
CY2020Q3	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	3379000	USD
CY2020Q3	us-gaap	Other Borrowings OtherBorrowings	237683000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	5226000	USD
CY2020Q3	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	4985000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	15818000	USD
CY2019Q3	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-659000	USD
	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	104028000	USD
	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	10951000	USD
	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	103094000	USD
	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-370000	USD
CY2020Q3	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	18920000	USD
	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	2900000	shares
CY2019Q3	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	17437000	USD
	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	37200000	USD
	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	48245000	USD
CY2020Q3	onb	Income Tax Reconciliation Tax Exempt Interest IncomeTaxReconciliationTaxExemptInterest	2682000	USD
CY2019Q3	onb	Income Tax Reconciliation Tax Exempt Interest IncomeTaxReconciliationTaxExemptInterest	2511000	USD
	onb	Income Tax Reconciliation Tax Exempt Interest IncomeTaxReconciliationTaxExemptInterest	7985000	USD
	onb	Income Tax Reconciliation Tax Exempt Interest IncomeTaxReconciliationTaxExemptInterest	7645000	USD
CY2020Q3	onb	Income Tax Reconciliation Non Deductible Expense Interest Disallowance IncomeTaxReconciliationNonDeductibleExpenseInterestDisallowance	36000	USD
CY2019Q3	onb	Income Tax Reconciliation Non Deductible Expense Interest Disallowance IncomeTaxReconciliationNonDeductibleExpenseInterestDisallowance	113000	USD
	onb	Income Tax Reconciliation Non Deductible Expense Interest Disallowance IncomeTaxReconciliationNonDeductibleExpenseInterestDisallowance	153000	USD
	onb	Income Tax Reconciliation Non Deductible Expense Interest Disallowance IncomeTaxReconciliationNonDeductibleExpenseInterestDisallowance	346000	USD
CY2020Q3	onb	Effective Income Tax Rate Reconciliation Tax Exempt Income Life Insurance Amount EffectiveIncomeTaxRateReconciliationTaxExemptIncomeLifeInsuranceAmount	386000	USD
CY2019Q3	onb	Effective Income Tax Rate Reconciliation Tax Exempt Income Life Insurance Amount EffectiveIncomeTaxRateReconciliationTaxExemptIncomeLifeInsuranceAmount	568000	USD
	onb	Effective Income Tax Rate Reconciliation Tax Exempt Income Life Insurance Amount EffectiveIncomeTaxRateReconciliationTaxExemptIncomeLifeInsuranceAmount	1657000	USD
	onb	Effective Income Tax Rate Reconciliation Tax Exempt Income Life Insurance Amount EffectiveIncomeTaxRateReconciliationTaxExemptIncomeLifeInsuranceAmount	1806000	USD
CY2020Q3	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	3032000	USD
CY2019Q3	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	2966000	USD
	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	9489000	USD
	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	9105000	USD
CY2020Q3	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	656000	USD
CY2019Q3	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1496000	USD
	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2367000	USD
	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	5053000	USD
CY2020Q3	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-2501000	USD
CY2019Q3	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-1598000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	15636000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	591000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	110492000	USD
	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	840000	USD
	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-557000	USD
CY2020Q3	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	2575000	USD
CY2019Q3	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	2443000	USD
	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	6296000	USD
	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	3577000	USD
CY2020Q3	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	686000	USD
CY2019Q3	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	1328000	USD
	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	232000	USD
	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	658000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	12154000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13254000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	24854000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	40717000	USD
CY2020Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.135
CY2019Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.160
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.140
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.177
	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	0	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	34677000	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 Gross DeferredTaxAssetsGross	109998000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	19673000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	1272000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	18982000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	25336000	USD
CY2020Q3	onb	Deferred Tax Assets Deferred Gain On Securities DeferredTaxAssetsDeferredGainOnSecurities	2272000	USD
CY2019Q4	onb	Deferred Tax Assets Deferred Gain On Securities DeferredTaxAssetsDeferredGainOnSecurities	3754000	USD
CY2020Q3	onb	Deferred Tax Assets Acquired Loan DeferredTaxAssetsAcquiredLoan	12542000	USD
CY2019Q4	onb	Deferred Tax Assets Acquired Loan DeferredTaxAssetsAcquiredLoan	16784000	USD
CY2020Q3	onb	Deferred Tax Assets Operating Lease Liabilities DeferredTaxAssetsOperatingLeaseLiabilities	24512000	USD
CY2019Q4	onb	Deferred Tax Assets Operating Lease Liabilities DeferredTaxAssetsOperatingLeaseLiabilities	26503000	USD
CY2020Q3	onb	Deferred Tax Assets Investments And Other Partnerships DeferredTaxAssetsInvestmentsAndOtherPartnerships	1264000	USD
CY2019Q4	onb	Deferred Tax Assets Investments And Other Partnerships DeferredTaxAssetsInvestmentsAndOtherPartnerships	1765000	USD
CY2020Q3	onb	Deferred Tax Assets Other Real Estate Owned DeferredTaxAssetsOtherRealEstateOwned	27000	USD
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CY2020Q3	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	6213000	USD
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CY2020Q3	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	14267000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	12167000	USD
CY2020Q3	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	956000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	973000	USD
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CY2020Q3	onb	Deferred Tax Liabilities Unrealized Gains On Available For Sale Investment Securities DeferredTaxLiabilitiesUnrealizedGainsOnAvailableForSaleInvestmentSecurities	41349000	USD
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CY2020Q3	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	2767000	USD
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CY2020Q3	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	4149000	USD
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CY2020Q3	us-gaap	Bad Debt Reserve For Tax Purposes Of Qualified Lender BadDebtReserveForTaxPurposesOfQualifiedLender	52800000	USD
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CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2020Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2020Q3	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	1106000000	USD
CY2019Q4	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	665500000	USD
CY2020Q3	onb	Percentage Of Periodic Changes In Fair Value Qualifies For Hedge Accounting PercentageOfPeriodicChangesInFairValueQualifiesForHedgeAccounting	1
CY2020Q3	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	154318000	USD
CY2020Q3	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	18776000	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
CY2020Q3	onb	Counterparty Interest Rate Swaps Fair Value CounterpartyInterestRateSwapsFairValue	0	USD
CY2020Q3	onb	Loan Commitments LoanCommitments	3511000000	USD
CY2020Q3	onb	Notional Amount Of Standby Letters Of Credit NotionalAmountOfStandbyLettersOfCredit	88500000	USD
CY2020Q3	us-gaap	Interest Rate Derivatives At Fair Value Net InterestRateDerivativesAtFairValueNet	109200000	USD
CY2019Q4	us-gaap	Interest Rate Derivatives At Fair Value Net InterestRateDerivativesAtFairValueNet	31600000	USD
	us-gaap	Loans And Leases Receivable Commitments Fixed Rates LoansAndLeasesReceivableCommitmentsFixedRates	3238000000	USD
	us-gaap	Loans And Leases Receivable Commitments Variable Rates LoansAndLeasesReceivableCommitmentsVariableRates	272100000	USD
	onb	Loan Commitments Floating Interest Rate Minimum LoanCommitmentsFloatingInterestRateMinimum	0
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CY2019Q4	onb	Loan Commitments LoanCommitments	2779000000	USD
CY2019Q4	onb	Notional Amount Of Standby Letters Of Credit NotionalAmountOfStandbyLettersOfCredit	87800000	USD
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CY2020Q3	onb	Credit Extended CreditExtended	8100000	USD
CY2020Q3	onb	Credit Extensions With Collateral CreditExtensionsWithCollateral	7500000	USD
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CY2019Q4	onb	Credit Extensions With Collateral CreditExtensionsWithCollateral	7700000	USD
	onb	Term Of Standby Letters Of Credit TermOfStandbyLettersOfCredit	P1Y
CY2020Q3	onb	Notional Amount Of Standby Letters Of Credit NotionalAmountOfStandbyLettersOfCredit	88500000	USD
CY2020Q3	onb	Carrying Value Of Letter Of Credit CarryingValueOfLetterOfCredit	400000	USD
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CY2019Q4	onb	Carrying Value Of Letter Of Credit CarryingValueOfLetterOfCredit	600000	USD
CY2020Q3	onb	Other Real Estate Owned And Other Repossessed Property OtherRealEstateOwnedAndOtherRepossessedProperty	106000	USD
CY2020Q3	onb	Other Real Estate Owned Property Write Down OtherRealEstateOwnedPropertyWriteDown	63000	USD
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CY2020Q3	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	2300000	USD
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	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Provisions Recoveries ValuationAllowanceForImpairmentOfRecognizedServicingAssetsProvisionsRecoveries	100000	USD
CY2019Q3	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Provisions Recoveries ValuationAllowanceForImpairmentOfRecognizedServicingAssetsProvisionsRecoveries	100000	USD
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	us-gaap	Interest And Fee Income Loans Commercial And Residential Real Estate InterestAndFeeIncomeLoansCommercialAndResidentialRealEstate	1500000	USD
CY2019Q3	us-gaap	Interest And Fee Income Loans Commercial And Residential Real Estate InterestAndFeeIncomeLoansCommercialAndResidentialRealEstate	400000	USD
	us-gaap	Interest And Fee Income Loans Commercial And Residential Real Estate InterestAndFeeIncomeLoansCommercialAndResidentialRealEstate	900000	USD
CY2020Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	29960000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	32899000	USD
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	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	98205000	USD

Files In Submission

Name	View Source	Status
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$ONB
Old National Bancorp Stock $onb

2020 Q3 Form 10-Q Financial Statement

#000070717920000191 Filed on October 28, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ONB Old National Bancorp Stock $onb

2020 Q3 Form 10-Q Financial Statement

#000070717920000191 Filed on October 28, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ONB
Old National Bancorp Stock $onb