$NWBI
Northwest Bancshares, Inc. Stock $nwbi

$nwbi Overview Financials Valuation SEC Filings Company Website

2023 Q1 Form 10-K Financial Statement

#000147126523000013 Filed on February 24, 2023

Income Statement

Concept	2023 Q1	2022 Q4	2022
Revenue	$134.9M		$448.8M
YoY Change	39.93%		7.24%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin	$5.902M		$22.41M
YoY Change	7.09%		1.85%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$2.154M	$2.574M	$11.60M
YoY Change	-40.08%	-61.0%	-4.13%
% of Gross Profit
Operating Expenses	$5.902M		$22.41M
YoY Change	7.09%		1.85%
Operating Profit
YoY Change
Interest Expense	$22.48M		$28.12M
YoY Change	286.85%		3.2%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$43.99M	$45.23M	$173.7M
YoY Change	22.53%	15.08%	-13.64%
Income Tax	$10.31M	$10.58M	$40.03M
% Of Pretax Income	23.43%	23.39%	23.04%
Net Earnings	$33.68M	$34.51M	$133.7M
YoY Change	19.06%	14.63%	-13.39%
Net Earnings / Revenue	24.96%		29.78%
Basic Earnings Per Share	$0.27		$1.05
Diluted Earnings Per Share	$0.26	$0.27	$1.05
COMMON SHARES
Basic Shares Outstanding	127.0M shares	127.0M shares	126.2M shares
Diluted Shares Outstanding	127.1M shares		126.7M shares

Balance Sheet

Concept	2023 Q1	2022 Q4	2022
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$96.50M	$139.4M
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	$140.3M	$145.9M	$200.8M
YoY Change	-6.45%	-6.78%	-4.82%
Goodwill	$381.0M	$381.0M
YoY Change	0.0%	0.0%
Intangibles	$7.651M	$8.560M
YoY Change	-34.35%	-33.31%
Long-Term Investments
YoY Change
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$14.19B	$14.11B	$14.11B
YoY Change	-1.51%	-2.68%	-2.68%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$2.236M	$3.231M	$3.231M
YoY Change	297.16%	61.55%	61.55%
Accrued Expenses			$57.74M
YoY Change			-0.45%
Deferred Revenue
YoY Change
Short-Term Debt	$688.6M	$681.2M
YoY Change	467.08%	389.72%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$2.236M	$3.231M	$60.97M
YoY Change	297.16%	-94.62%	1.61%
LONG-TERM LIABILITIES
Long-Term Debt	$931.9M	$924.3M	$924.3M
YoY Change	149.03%	135.8%	135.8%
Other Long-Term Liabilities	$209.2M	$229.7M	$172.0M
YoY Change	8.67%	38.4%	3.62%
Total Long-Term Liabilities	$1.141B	$1.154B	$1.096B
YoY Change	101.36%	106.82%	96.47%
TOTAL LIABILITIES
Total Short-Term Liabilities	$2.236M	$3.231M	$60.97M
Total Long-Term Liabilities	$1.141B	$1.154B	$1.096B
Total Liabilities	$12.68B	$12.62B	$12.62B
YoY Change	-1.61%	-2.29%	-2.29%
SHAREHOLDERS EQUITY
Retained Earnings	$649.7M	$641.7M
YoY Change	6.07%	5.28%
Common Stock	$1.022B	$1.021B
YoY Change	0.84%	0.91%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.513B	$1.491B	$1.491B
YoY Change
Total Liabilities & Shareholders Equity	$14.19B	$14.11B	$14.11B
YoY Change	-1.51%	-2.68%	-2.68%

Cashflow Statement

Concept	2023 Q1	2022 Q4	2022
OPERATING ACTIVITIES
Net Income	$33.68M	$34.51M	$133.7M
YoY Change	19.06%	14.63%	-13.39%
Depreciation, Depletion And Amortization	$2.154M	$2.574M	$11.60M
YoY Change	-40.08%	-61.0%	-4.13%
Cash From Operating Activities	$29.84M	$65.35M	$175.4M
YoY Change	-232.89%	-3.9%	-14.61%
INVESTING ACTIVITIES
Capital Expenditures		$3.707M	$4.320M
YoY Change		-126.86%	-75.34%
Acquisitions			$0.00
YoY Change
Other Investing Activities	-$130.2M	-$152.1M	-$913.1M
YoY Change	79.07%	-407.96%	323.71%
Cash From Investing Activities	-$130.2M	-$155.8M	-$917.4M
YoY Change	79.07%	-536.53%	293.79%
FINANCING ACTIVITIES
Cash Dividend Paid	$25.41M		$101.5M
YoY Change	0.28%		1.19%
Common Stock Issuance & Retirement, Net			$0.00
YoY Change			-100.0%
Debt Paid & Issued, Net			$10.09M
YoY Change			-54.34%
Cash From Financing Activities	$57.45M	111.3M	-$397.9M
YoY Change	-348.55%	30.64%	-169.75%
NET CHANGE
Cash From Operating Activities	$29.84M	65.35M	$175.4M
Cash From Investing Activities	-$130.2M	-155.8M	-$917.4M
Cash From Financing Activities	$57.45M	111.3M	-$397.9M
Net Change In Cash	-$42.87M	20.82M	-$1.140B
YoY Change	-63.75%	-88.98%	-309.93%
FREE CASH FLOW
Cash From Operating Activities	$29.84M	$65.35M	$175.4M
Capital Expenditures		$3.707M	$4.320M
Free Cash Flow		$61.64M	$171.1M
YoY Change		-24.64%	-8.95%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2022	dei	Entity Central Index Key EntityCentralIndexKey	0001471265
CY2022	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
CY2022	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
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CY2022	dei	Document Type DocumentType	10-K
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CY2022	dei	Document Period End Date DocumentPeriodEndDate	2022-12-31
CY2022	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2022	dei	Document Transition Report DocumentTransitionReport	false
CY2022	dei	Entity File Number EntityFileNumber	001-34582
CY2022	dei	Entity Registrant Name EntityRegistrantName	NORTHWEST BANCSHARES, INC.
CY2022	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MD
CY2022	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	27-0950358
CY2022	dei	Entity Address Address Line1 EntityAddressAddressLine1	3 Easton Oval,
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CY2022	dei	Entity Address State Or Province EntityAddressStateOrProvince	OH
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CY2022	dei	City Area Code CityAreaCode	814
CY2022	dei	Local Phone Number LocalPhoneNumber	726-2140
CY2022	dei	Security12b Title Security12bTitle	Common Stock, $0.01 Par Value
CY2022	dei	Trading Symbol TradingSymbol	NWBI
CY2022	dei	Security Exchange Name SecurityExchangeName	NASDAQ
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CY2021	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	51837000	usd
CY2020	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	55613000	usd
CY2022	nwbi	Fees And Commissions Trust Services And Other Income FeesAndCommissionsTrustServicesAndOtherIncome	27765000	usd
CY2021	nwbi	Fees And Commissions Trust Services And Other Income FeesAndCommissionsTrustServicesAndOtherIncome	27921000	usd
CY2020	nwbi	Fees And Commissions Trust Services And Other Income FeesAndCommissionsTrustServicesAndOtherIncome	20922000	usd
CY2022	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	0	usd
CY2021	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	3633000	usd
CY2020	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	9132000	usd
CY2022	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	603000	usd
CY2021	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	442000	usd
CY2020	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-106000	usd
CY2022	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	7129000	usd
CY2021	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	6050000	usd
CY2020	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	5190000	usd
CY2022	nwbi	Mortgage Banking Income MortgageBankingIncome	4865000	usd
CY2021	nwbi	Mortgage Banking Income MortgageBankingIncome	15892000	usd
CY2020	nwbi	Mortgage Banking Income MortgageBankingIncome	31391000	usd
CY2022	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	usd
CY2021	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	25327000	usd
CY2020	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	usd
CY2022	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	15307000	usd
CY2021	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	11963000	usd
CY2020	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	8585000	usd
CY2022	us-gaap	Noninterest Income NoninterestIncome	110849000	usd
CY2021	us-gaap	Noninterest Income NoninterestIncome	142889000	usd
CY2020	us-gaap	Noninterest Income NoninterestIncome	132265000	usd
CY2022	us-gaap	Labor And Related Expense LaborAndRelatedExpense	188359000	usd
CY2021	us-gaap	Labor And Related Expense LaborAndRelatedExpense	193887000	usd
CY2020	us-gaap	Labor And Related Expense LaborAndRelatedExpense	178375000	usd
CY2022	us-gaap	Occupancy Net OccupancyNet	29618000	usd
CY2021	us-gaap	Occupancy Net OccupancyNet	31073000	usd
CY2020	us-gaap	Occupancy Net OccupancyNet	30622000	usd
CY2022	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	13318000	usd
CY2021	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	13769000	usd
CY2020	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	15728000	usd
CY2022	nwbi	Noninterest Expense Collection Of Receivables NoninterestExpenseCollectionOfReceivables	1808000	usd
CY2021	nwbi	Noninterest Expense Collection Of Receivables NoninterestExpenseCollectionOfReceivables	1932000	usd
CY2020	nwbi	Noninterest Expense Collection Of Receivables NoninterestExpenseCollectionOfReceivables	3275000	usd
CY2022	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	52496000	usd
CY2021	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	55763000	usd
CY2020	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	50050000	usd
CY2022	us-gaap	Marketing Expense MarketingExpense	9095000	usd
CY2021	us-gaap	Marketing Expense MarketingExpense	8237000	usd
CY2020	us-gaap	Marketing Expense MarketingExpense	7695000	usd
CY2022	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	4778000	usd
CY2021	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	4975000	usd
CY2020	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	4767000	usd
CY2022	us-gaap	Professional Fees ProfessionalFees	14703000	usd
CY2021	us-gaap	Professional Fees ProfessionalFees	17621000	usd
CY2020	us-gaap	Professional Fees ProfessionalFees	12482000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4277000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	5553000	usd
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	6856000	usd
CY2022	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	223000	usd
CY2021	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	298000	usd
CY2020	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	359000	usd
CY2022	nwbi	Merger Asset Disposition And Restructuring Expense MergerAssetDispositionAndRestructuringExpense	5617000	usd
CY2021	nwbi	Merger Asset Disposition And Restructuring Expense MergerAssetDispositionAndRestructuringExpense	3453000	usd
CY2020	nwbi	Merger Asset Disposition And Restructuring Expense MergerAssetDispositionAndRestructuringExpense	20789000	usd
CY2022	us-gaap	Other Noninterest Expense OtherNoninterestExpense	15686000	usd
CY2021	us-gaap	Other Noninterest Expense OtherNoninterestExpense	8349000	usd
CY2020	us-gaap	Other Noninterest Expense OtherNoninterestExpense	16494000	usd
CY2022	us-gaap	Noninterest Expense NoninterestExpense	339978000	usd
CY2021	us-gaap	Noninterest Expense NoninterestExpense	344910000	usd
CY2020	us-gaap	Noninterest Expense NoninterestExpense	347492000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	173692000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	201124000	usd
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	92526000	usd
CY2022	nwbi	Federal Tax Expense Benefit FederalTaxExpenseBenefit	30910000	usd
CY2021	nwbi	Federal Tax Expense Benefit FederalTaxExpenseBenefit	35306000	usd
CY2020	nwbi	Federal Tax Expense Benefit FederalTaxExpenseBenefit	14896000	usd
CY2022	nwbi	State And Local Tax Expense Benefit StateAndLocalTaxExpenseBenefit	9116000	usd
CY2021	nwbi	State And Local Tax Expense Benefit StateAndLocalTaxExpenseBenefit	11495000	usd
CY2020	nwbi	State And Local Tax Expense Benefit StateAndLocalTaxExpenseBenefit	2776000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	40026000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	46801000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	17672000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	133666000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	154323000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	74854000	usd
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.05
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.22
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.62
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.05
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.21
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.62
CY2022	us-gaap	Net Income Loss NetIncomeLoss	133666000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	154323000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	74854000	usd
CY2022	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-45321000	usd
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-10333000	usd
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	5607000	usd
CY2022	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-151888000	usd
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-28873000	usd
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	13711000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	usd
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	92000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	6000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	1000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	287000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	15000	usd
CY2022	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-151889000	usd
CY2021	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-29160000	usd
CY2020	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	13696000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	0	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	0	usd
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	-209000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	0	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	0	usd
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-946000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	0	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	0	usd
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	-209000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	0	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	0	usd
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-946000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	0	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	0	usd
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	0	usd
CY2022	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	7182000	usd
CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	9144000	usd
CY2020	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-4169000	usd
CY2022	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	18884000	usd
CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	23748000	usd
CY2020	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-11301000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	-202000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	515000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	395000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	-524000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	1332000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	997000	usd
CY2022	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-18360000	usd
CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-25080000	usd
CY2020	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	10304000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-133529000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-4080000	usd
CY2022	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Period Increase Decrease DebtSecuritiesAvailableForSaleAllowanceForCreditLossPeriodIncreaseDecrease	0	usd
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	3392000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	137000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	150243000	usd
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	78246000	usd
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	1353285000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	74854000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	1827000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	3392000	usd
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	78246000	usd
CY2020	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	213406000	usd
CY2020	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1479000	usd
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	9276000	usd
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	4239000	usd
CY2020	us-gaap	Stock Granted During Period Value Sharebased Compensation Forfeited StockGrantedDuringPeriodValueSharebasedCompensationForfeited	0	usd
CY2020	us-gaap	Noncontrolling Interest Increase From Business Combination NoncontrollingInterestIncreaseFromBusinessCombination	105000	usd
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.76
CY2020	us-gaap	Dividends Cash DividendsCash	93132000	usd
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	1538703000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	154323000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-766000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-4080000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	150243000	usd
CY2021	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	14011000	usd
CY2021	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	23854000	usd
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	4742000	usd
CY2021	us-gaap	Stock Granted During Period Value Sharebased Compensation Forfeited StockGrantedDuringPeriodValueSharebasedCompensationForfeited	0	usd
CY2021	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.79
CY2021	us-gaap	Dividends Cash DividendsCash	100274000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	1583571000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	133666000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-38341000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-133529000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	137000	usd
CY2022	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	5173000	usd
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	4074000	usd
CY2022	us-gaap	Stock Granted During Period Value Sharebased Compensation Forfeited StockGrantedDuringPeriodValueSharebasedCompensationForfeited	1000	usd
CY2022	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.80
CY2022	us-gaap	Dividends Cash DividendsCash	101468000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	1491486000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	133666000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	154323000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	74854000	usd
CY2022	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	17860000	usd
CY2021	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-11883000	usd
CY2020	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	83975000	usd
CY2022	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	-42000	usd
CY2021	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	1201000	usd
CY2020	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	3249000	usd
CY2022	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	3512000	usd
CY2021	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	20120000	usd
CY2020	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	25798000	usd
CY2022	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	usd
CY2021	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	25327000	usd
CY2020	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	usd
CY2022	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	6448000	usd
CY2021	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	6633000	usd
CY2020	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	4738000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	33751000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-22163000	usd
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	16097000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	30230000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	4025000	usd
CY2020	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	47018000	usd
CY2022	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-4808000	usd
CY2021	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-7757000	usd
CY2020	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-3797000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	4074000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	4742000	usd
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	4239000	usd
CY2022	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	54000	usd
CY2021	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	173000	usd
CY2020	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	321000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-5504000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	12314000	usd
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-8084000	usd
CY2022	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	362867000	usd
CY2021	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	752831000	usd
CY2020	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	729939000	usd
CY2022	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	383883000	usd
CY2021	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	804690000	usd
CY2020	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	704660000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	175431000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	205458000	usd
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	140435000	usd
CY2022	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	212892000	usd
CY2021	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	658817000	usd
CY2020	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	164629000	usd
CY2022	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	102178000	usd
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	705146000	usd
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	830487000	usd
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	98701000	usd
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	68495000	usd
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	3760000	usd
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	231728000	usd
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	449372000	usd
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	392511000	usd
CY2022	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	usd
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	59579000	usd
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	1096000	usd
CY2022	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	5096000	usd
CY2021	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	3984000	usd
CY2020	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	596000	usd
CY2022	nwbi	Originations Of Loans Receivable Held For Investment OriginationsOfLoansReceivableHeldForInvestment	4585563000	usd
CY2021	nwbi	Originations Of Loans Receivable Held For Investment OriginationsOfLoansReceivableHeldForInvestment	3961816000	usd
CY2020	nwbi	Originations Of Loans Receivable Held For Investment OriginationsOfLoansReceivableHeldForInvestment	4655969000	usd
CY2022	us-gaap	Payments To Acquire Loans Receivable PaymentsToAcquireLoansReceivable	371121000	usd
CY2021	us-gaap	Payments To Acquire Loans Receivable PaymentsToAcquireLoansReceivable	0	usd
CY2020	us-gaap	Payments To Acquire Loans Receivable PaymentsToAcquireLoansReceivable	0	usd
CY2022	nwbi	Proceeds From Maturities And Principal Reductions On Loans ProceedsFromMaturitiesAndPrincipalReductionsOnLoans	4047147000	usd
CY2021	nwbi	Proceeds From Maturities And Principal Reductions On Loans ProceedsFromMaturitiesAndPrincipalReductionsOnLoans	4490089000	usd
CY2020	nwbi	Proceeds From Maturities And Principal Reductions On Loans ProceedsFromMaturitiesAndPrincipalReductionsOnLoans	4383933000	usd
CY2022	us-gaap	Proceeds From Sale Of Loans Held For Investment ProceedsFromSaleOfLoansHeldForInvestment	0	usd
CY2021	us-gaap	Proceeds From Sale Of Loans Held For Investment ProceedsFromSaleOfLoansHeldForInvestment	0	usd
CY2020	us-gaap	Proceeds From Sale Of Loans Held For Investment ProceedsFromSaleOfLoansHeldForInvestment	50791000	usd
CY2022	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	25959000	usd
CY2021	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-7564000	usd
CY2020	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-6107000	usd
CY2022	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	1633000	usd
CY2021	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	2700000	usd
CY2020	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	1651000	usd
CY2022	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	305000	usd
CY2021	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	305000	usd
CY2020	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	607000	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	4320000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	17517000	usd
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	12254000	usd
CY2022	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	usd
CY2021	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	28238000	usd
CY2020	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	usd
CY2022	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	usd
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	usd
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-261712000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-917423000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-232970000	usd
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-560575000	usd
CY2022	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-836617000	usd
CY2021	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	701932000	usd
CY2020	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	1390187000	usd
CY2022	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	usd
CY2021	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	usd
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	123211000	usd
CY2022	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	10094000	usd
CY2021	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	22105000	usd
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	206908000	usd
CY2022	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	542073000	usd
CY2021	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	1432000	usd
CY2020	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-108675000	usd
CY2022	us-gaap	Increase Decrease In Advance Payments By Borrowers For Taxes And Insurance IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance	3031000	usd
CY2021	us-gaap	Increase Decrease In Advance Payments By Borrowers For Taxes And Insurance IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance	-648000	usd
CY2020	us-gaap	Increase Decrease In Advance Payments By Borrowers For Taxes And Insurance IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance	-1315000	usd
CY2022	us-gaap	Payments Of Dividends PaymentsOfDividends	101468000	usd
CY2021	us-gaap	Payments Of Dividends PaymentsOfDividends	100274000	usd
CY2020	us-gaap	Payments Of Dividends PaymentsOfDividends	93132000	usd
CY2022	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	5173000	usd
CY2021	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	14011000	usd
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1479000	usd
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	usd
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	23854000	usd
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	9276000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-397902000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	570494000	usd
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1095571000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-1139894000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	542982000	usd
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	675431000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1279259000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	736277000	usd
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	60846000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-1139894000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	542982000	usd
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	675431000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	139365000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1279259000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	736277000	usd
CY2022	nwbi	Cash Paid For Interest On Deposits CashPaidForInterestOnDeposits	13399000	usd
CY2021	nwbi	Cash Paid For Interest On Deposits CashPaidForInterestOnDeposits	18711000	usd
CY2020	nwbi	Cash Paid For Interest On Deposits CashPaidForInterestOnDeposits	34313000	usd
CY2022	nwbi	Cash Paid For Interest On Deposits And Borrowings CashPaidForInterestOnDepositsAndBorrowings	26690000	usd
CY2021	nwbi	Cash Paid For Interest On Deposits And Borrowings CashPaidForInterestOnDepositsAndBorrowings	27496000	usd
CY2020	nwbi	Cash Paid For Interest On Deposits And Borrowings CashPaidForInterestOnDepositsAndBorrowings	41428000	usd
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	39365000	usd
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	33576000	usd
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	29767000	usd
CY2022	us-gaap	Noncash Or Part Noncash Acquisition Value Of Assets Acquired1 NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1	0	usd
CY2021	us-gaap	Noncash Or Part Noncash Acquisition Value Of Assets Acquired1 NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1	0	usd
CY2020	us-gaap	Noncash Or Part Noncash Acquisition Value Of Assets Acquired1 NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1	2090599000	usd
CY2022	us-gaap	Stock Issued1 StockIssued1	0	usd
CY2021	us-gaap	Stock Issued1 StockIssued1	0	usd
CY2020	us-gaap	Stock Issued1 StockIssued1	213406000	usd
CY2022	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	0	usd
CY2021	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	0	usd
CY2020	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	0	usd
CY2022	us-gaap	Noncash Or Part Noncash Acquisition Net Nonmonetary Assets Acquired Liabilities Assumed1 NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1	0	usd
CY2021	us-gaap	Noncash Or Part Noncash Acquisition Net Nonmonetary Assets Acquired Liabilities Assumed1 NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1	0	usd
CY2020	us-gaap	Noncash Or Part Noncash Acquisition Net Nonmonetary Assets Acquired Liabilities Assumed1 NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1	1877193000	usd
CY2022	nwbi	Transfer Of Other Real Estate And Other Repossessed Personal Property TransferOfOtherRealEstateAndOtherRepossessedPersonalProperty	4076000	usd
CY2021	nwbi	Transfer Of Other Real Estate And Other Repossessed Personal Property TransferOfOtherRealEstateAndOtherRepossessedPersonalProperty	4897000	usd
CY2020	nwbi	Transfer Of Other Real Estate And Other Repossessed Personal Property TransferOfOtherRealEstateAndOtherRepossessedPersonalProperty	5643000	usd
CY2022	nwbi	Sale And Financing Of Other Real Estate Owned SaleAndFinancingOfOtherRealEstateOwned	175000	usd
CY2021	nwbi	Sale And Financing Of Other Real Estate Owned SaleAndFinancingOfOtherRealEstateOwned	54000	usd
CY2020	nwbi	Sale And Financing Of Other Real Estate Owned SaleAndFinancingOfOtherRealEstateOwned	126000	usd
CY2022Q4	nwbi	Number Of Banking Locations NumberOfBankingLocations	150	bank_location
CY2022	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2022Q4	us-gaap	Trading Securities TradingSecurities	0	usd
CY2021Q4	us-gaap	Trading Securities TradingSecurities	0	usd
CY2022	nwbi	Debt Securities Held To Maturity Accrued Interest Receivable DebtSecuritiesHeldToMaturityAccruedInterestReceivable	2800000	usd
CY2021	nwbi	Debt Securities Held To Maturity Accrued Interest Receivable DebtSecuritiesHeldToMaturityAccruedInterestReceivable	2200000	usd
CY2022	nwbi	Debt Securities Available For Sale Accrued Interest Receivable DebtSecuritiesAvailableForSaleAccruedInterestReceivable	2000000	usd
CY2021	nwbi	Debt Securities Available For Sale Accrued Interest Receivable DebtSecuritiesAvailableForSaleAccruedInterestReceivable	1900000	usd
CY2022	nwbi	Financing Receivable Accrued Interest Receivable FinancingReceivableAccruedInterestReceivable	30400000	usd
CY2021	nwbi	Financing Receivable Accrued Interest Receivable FinancingReceivableAccruedInterestReceivable	21300000	usd
CY2022	nwbi	Financing Receivable Number Of Days Delinquency For Accrued Interest On Loans To Be Considered Reversal FinancingReceivableNumberOfDaysDelinquencyForAccruedInterestOnLoansToBeConsideredReversal	P90D
CY2022	nwbi	Financing Receivable Number Of Days Delinquent For Loans To Be Placed On Nonaccrual Status FinancingReceivableNumberOfDaysDelinquentForLoansToBePlacedOnNonaccrualStatus	P90D
CY2022	nwbi	Period To Return Troubled Debt Restructured Loans Included In Non Performing Loans To Performing Status PeriodToReturnTroubledDebtRestructuredLoansIncludedInNonPerformingLoansToPerformingStatus	P180D
CY2022Q4	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	9900000	usd
CY2021Q4	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	25100000	usd
CY2022Q4	nwbi	Number Of Loan Segments NumberOfLoanSegments	7	segment
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2022	us-gaap	Use Of Estimates UseOfEstimates	Use of Estimates<span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of financial statements, in conformity with accounting principles generally accepted in the United States of America, requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amount of revenues and expenses during the reporting period.</span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> The estimate and assumptions that we deem important to our financial statements relate to the allowance for credit losses. This estim</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">ate and assumptions are based on management’s best estimates and judgment and we evaluate them using historical experience and other factors, including the current economic environment. We adjust our estimates and assumptions when facts and circumstances dictate. As future events cannot be determined, actual results could differ significantly from our estimates.</span>
CY2022	us-gaap	Comparability Of Prior Year Financial Data ComparabilityOfPriorYearFinancialData	Reclassification of Prior Years’ Statements<div style="text-align:justify;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> </span></div><div style="text-align:justify;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Certain items previously reported have been reclassified to conform with the current year’s reporting format.</span></div>
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	6201000	usd
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	5802000	usd
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	6139000	usd
CY2022	us-gaap	Variable Lease Cost VariableLeaseCost	677000	usd
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	662000	usd
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	680000	usd
CY2022	us-gaap	Lease Cost LeaseCost	6878000	usd
CY2021	us-gaap	Lease Cost LeaseCost	6464000	usd
CY2020	us-gaap	Lease Cost LeaseCost	6819000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	54925000	usd
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	54887000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	57737000	usd
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	57726000	usd
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	6207000	usd
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	6143000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	5588000	usd
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	12866000	usd
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P15Y7M6D
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P15Y10M24D
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.032
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.031
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	6007000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	5300000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	4975000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	4878000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	4692000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	49294000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	75146000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	17409000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	57737000	usd
CY2022	us-gaap	Lease Cost LeaseCost	6900000	usd
CY2021	us-gaap	Lease Cost LeaseCost	6500000	usd
CY2020	us-gaap	Lease Cost LeaseCost	6800000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	1431728000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	105000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	213725000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	1218108000	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Excluding Accrued Interest After Allowance For Credit Loss DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss	881249000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	0	usd
CY2022Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	129865000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	751384000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	1565002000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	8845000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	25255000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	1548592000	usd
CY2021Q4	us-gaap	Debt Securities Held To Maturity Excluding Accrued Interest After Allowance For Credit Loss DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss	768154000	usd
CY2021Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	350000	usd
CY2021Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	16991000	usd
CY2021Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	751513000	usd
CY2022Q4	us-gaap	Security Owned And Pledged As Collateral Associated Liabilities Fair Value SecurityOwnedAndPledgedAsCollateralAssociatedLiabilitiesFairValue	241500000	usd
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	59600000	usd
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	410000	usd
CY2021	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	396000	usd
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	1100000	usd
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	64000	usd
CY2020	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	0	usd
CY2021	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Period Increase Decrease DebtSecuritiesAvailableForSaleAllowanceForCreditLossPeriodIncreaseDecrease	0	usd
CY2022Q4	nwbi	Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	448576000	usd
CY2022Q4	nwbi	Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses1 HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses1	27487000	usd
CY2022Q4	nwbi	Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	1509214000	usd
CY2022Q4	nwbi	Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses	316103000	usd
CY2022Q4	nwbi	Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position Fair Value HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	1957790000	usd
CY2022Q4	nwbi	Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position Aggregate Losses1 HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses1	343590000	usd
CY2021Q4	nwbi	Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	1586482000	usd
CY2021Q4	nwbi	Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses1 HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses1	30356000	usd
CY2021Q4	nwbi	Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	290549000	usd
CY2021Q4	nwbi	Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses	11890000	usd
CY2021Q4	nwbi	Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position Fair Value HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	1877031000	usd
CY2021Q4	nwbi	Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position Aggregate Losses1 HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses1	42246000	usd
CY2022	nwbi	Number Of Investment Positions With Unrealized Losses NumberOfInvestmentPositionsWithUnrealizedLosses	647	position
CY2022Q4	us-gaap	Debt Securities Held To Maturity Excluding Accrued Interest After Allowance For Credit Loss DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss	881249000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	10920452000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	10016392000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	118036000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	102241000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	10802416000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	9914151000	usd
CY2022Q4	us-gaap	Financing Receivable Unamortized Loan Commitment Origination Fee And Premium Discount FinancingReceivableUnamortizedLoanCommitmentOriginationFeeAndPremiumDiscount	76100000	usd
CY2021Q4	us-gaap	Financing Receivable Unamortized Loan Commitment Origination Fee And Premium Discount FinancingReceivableUnamortizedLoanCommitmentOriginationFeeAndPremiumDiscount	62800000	usd
CY2022Q4	us-gaap	Derecognized Assets Securitized Or Assetbacked Financing Arrangement Assets And Any Other Financial Assets Managed Together Principal Amount Outstanding DerecognizedAssetsSecuritizedOrAssetbackedFinancingArrangementAssetsAndAnyOtherFinancialAssetsManagedTogetherPrincipalAmountOutstanding	1549000000	usd
CY2021Q4	us-gaap	Derecognized Assets Securitized Or Assetbacked Financing Arrangement Assets And Any Other Financial Assets Managed Together Principal Amount Outstanding DerecognizedAssetsSecuritizedOrAssetbackedFinancingArrangementAssetsAndAnyOtherFinancialAssetsManagedTogetherPrincipalAmountOutstanding	1622000000	usd
CY2021Q4	nwbi	Percentage Of Financing Receivable Portfolio Secured By Properties PercentageOfFinancingReceivablePortfolioSecuredByProperties	0.41
CY2022Q4	us-gaap	Loans Receivable With Variable Rates Of Interest1 LoansReceivableWithVariableRatesOfInterest1	3333000000	usd
CY2021Q4	us-gaap	Loans Receivable With Variable Rates Of Interest1 LoansReceivableWithVariableRatesOfInterest1	3277000000	usd
CY2022Q4	us-gaap	Loans Receivable With Fixed Rates Of Interest1 LoansReceivableWithFixedRatesOfInterest1	7511000000	usd
CY2020	us-gaap	Financing Receivable Allowance For Credit Loss Purchased With Credit Deterioration Increase FinancingReceivableAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease	8845000	usd
CY2021Q4	us-gaap	Loans Receivable With Fixed Rates Of Interest1 LoansReceivableWithFixedRatesOfInterest1	6739000000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	118036000	usd
CY2022	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	17860000	usd
CY2022	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	20931000	usd
CY2022	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	18866000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	102241000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	102241000	usd
CY2021	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-11883000	usd
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	34137000	usd
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	13834000	usd
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	134427000	usd
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	134427000	usd
CY2020	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	83975000	usd
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	34718000	usd
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	7592000	usd
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	57941000	usd
CY2020	us-gaap	Financing Receivable Significant Sales FinancingReceivableSignificantSales	50000000	usd
CY2020	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	1300000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	10920452000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	118036000	usd
CY2022Q4	nwbi	Financing Receivable Nonaccrual Including Nonaccrual With No Allowance FinancingReceivableNonaccrualIncludingNonaccrualWithNoAllowance	81236000	usd
CY2022Q4	nwbi	Financing Receivable Recorded Investment90 Days Or More Past Maturity And Still Accruing FinancingReceivableRecordedInvestment90DaysOrMorePastMaturityAndStillAccruing	744000	usd
CY2022Q4	nwbi	Financing Receivable Troubled Debt Restructuring Excluding Nonaccrual FinancingReceivableTroubledDebtRestructuringExcludingNonaccrual	40681000	usd
CY2022Q4	nwbi	Financing Receivable Allowance For Credit Loss Modifications FinancingReceivableAllowanceForCreditLossModifications	2400000	usd
CY2022Q4	nwbi	Financing Receivable Modifications Recorded Investment Additional Commitment FinancingReceivableModificationsRecordedInvestmentAdditionalCommitment	404000	usd
CY2022Q4	nwbi	Financing Receivable Modifications Recorded Investment Non Accrual FinancingReceivableModificationsRecordedInvestmentNonAccrual	29200000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	10016392000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	102241000	usd
CY2021Q4	nwbi	Financing Receivable Nonaccrual Including Nonaccrual With No Allowance FinancingReceivableNonaccrualIncludingNonaccrualWithNoAllowance	158471000	usd
CY2021Q4	nwbi	Financing Receivable Recorded Investment90 Days Or More Past Maturity And Still Accruing FinancingReceivableRecordedInvestment90DaysOrMorePastMaturityAndStillAccruing	331000	usd
CY2021	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	803000	usd
CY2021Q4	nwbi	Financing Receivable Troubled Debt Restructuring Excluding Nonaccrual FinancingReceivableTroubledDebtRestructuringExcludingNonaccrual	30288000	usd
CY2021Q4	nwbi	Financing Receivable Allowance For Credit Loss Modifications FinancingReceivableAllowanceForCreditLossModifications	4817000	usd
CY2021Q4	nwbi	Financing Receivable Modifications Recorded Investment Additional Commitment FinancingReceivableModificationsRecordedInvestmentAdditionalCommitment	460000	usd
CY2021Q4	nwbi	Financing Receivable Modifications Recorded Investment Non Accrual FinancingReceivableModificationsRecordedInvestmentNonAccrual	17200000	usd
CY2021Q4	nwbi	Financing Receivable Nonaccrual Including Nonaccrual With No Allowance FinancingReceivableNonaccrualIncludingNonaccrualWithNoAllowance	158471000	usd
CY2022Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	38722000	usd
CY2022Q4	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	42514000	usd
CY2022Q4	nwbi	Financing Receivable Nonaccrual Including Nonaccrual With No Allowance FinancingReceivableNonaccrualIncludingNonaccrualWithNoAllowance	81236000	usd
CY2022Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	744000	usd
CY2022	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	678000	usd
CY2020Q4	nwbi	Financing Receivable Nonaccrual Including Nonaccrual With No Allowance FinancingReceivableNonaccrualIncludingNonaccrualWithNoAllowance	102832000	usd
CY2021Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	90581000	usd
CY2021Q4	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	67890000	usd
CY2021Q4	nwbi	Financing Receivable Nonaccrual Including Nonaccrual With No Allowance FinancingReceivableNonaccrualIncludingNonaccrualWithNoAllowance	158471000	usd
CY2021Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	331000	usd
CY2022Q4	nwbi	Financing Receivable Amortized Cost Of Collateral Dependent Loans FinancingReceivableAmortizedCostOfCollateralDependentLoans	58110000	usd
CY2021Q4	nwbi	Financing Receivable Amortized Cost Of Collateral Dependent Loans FinancingReceivableAmortizedCostOfCollateralDependentLoans	128108000	usd
CY2021Q4	nwbi	Financing Receivable Modifications Outstanding Number Of Contracts FinancingReceivableModificationsOutstandingNumberOfContracts	134	contract
CY2021Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	30288000	usd
CY2020Q4	nwbi	Financing Receivable Modifications Outstanding Number Of Contracts FinancingReceivableModificationsOutstandingNumberOfContracts	170	contract
CY2020Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	32135000	usd
CY2022	nwbi	Financing Receivable Modifications Number Of Contracts2 Additions FinancingReceivableModificationsNumberOfContracts2Additions	14	contract
CY2022	nwbi	Financing Receivable Modifications Recorded Investment Additions FinancingReceivableModificationsRecordedInvestmentAdditions	30894000	usd
CY2021	nwbi	Financing Receivable Modifications Number Of Contracts2 Additions FinancingReceivableModificationsNumberOfContracts2Additions	9	contract
CY2021	nwbi	Financing Receivable Modifications Recorded Investment Additions FinancingReceivableModificationsRecordedInvestmentAdditions	7253000	usd
CY2022	nwbi	Financing Receivable Modifications Number Of Contracts Remodified FinancingReceivableModificationsNumberOfContractsRemodified	11	contract
CY2022	nwbi	Financing Receivable Modifications Recorded Investment Re Modifications FinancingReceivableModificationsRecordedInvestmentReModifications	8391000	usd
CY2021	nwbi	Financing Receivable Modifications Number Of Contracts Remodified FinancingReceivableModificationsNumberOfContractsRemodified	9	contract
CY2021	nwbi	Financing Receivable Modifications Recorded Investment Re Modifications FinancingReceivableModificationsRecordedInvestmentReModifications	7370000	usd
CY2022	nwbi	Financing Receivable Modifications Number Of Contracts Net Paydowns FinancingReceivableModificationsNumberOfContractsNetPaydowns	0	usd
CY2022	nwbi	Financing Receivable Modifications Recorded Investment Net Paydowns FinancingReceivableModificationsRecordedInvestmentNetPaydowns	11870000	usd
CY2021	nwbi	Financing Receivable Modifications Number Of Contracts Net Paydowns FinancingReceivableModificationsNumberOfContractsNetPaydowns	0	usd
CY2021	nwbi	Financing Receivable Modifications Recorded Investment Net Paydowns FinancingReceivableModificationsRecordedInvestmentNetPaydowns	3420000	usd
CY2022Q4	nwbi	Financing Receivable Modifications Outstanding Number Of Contracts FinancingReceivableModificationsOutstandingNumberOfContracts	123	contract
CY2022Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	40681000	usd
CY2021Q4	nwbi	Financing Receivable Modifications Outstanding Number Of Contracts FinancingReceivableModificationsOutstandingNumberOfContracts	134	contract
CY2021Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	30288000	usd
CY2022Q4	nwbi	Financing Receivable Modifications Recorded Investment Accrual FinancingReceivableModificationsRecordedInvestmentAccrual	11442000	usd
CY2021Q4	nwbi	Financing Receivable Modifications Recorded Investment Accrual FinancingReceivableModificationsRecordedInvestmentAccrual	13072000	usd
CY2022Q4	nwbi	Financing Receivable Modifications Recorded Investment Non Accrual FinancingReceivableModificationsRecordedInvestmentNonAccrual	29239000	usd
CY2021Q4	nwbi	Financing Receivable Modifications Recorded Investment Non Accrual FinancingReceivableModificationsRecordedInvestmentNonAccrual	17216000	usd
CY2022	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	25	contract
CY2022	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	39285000	usd
CY2022	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	21910000	usd
CY2022	nwbi	Financing Receivable Modification Allowance For Credit Losses FinancingReceivableModificationAllowanceForCreditLosses	165000	usd
CY2021	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	18	contract
CY2021	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	16433000	usd
CY2021	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	14623000	usd
CY2021	nwbi	Financing Receivable Modification Allowance For Credit Losses FinancingReceivableModificationAllowanceForCreditLosses	1953000	usd
CY2020	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	18	contract
CY2020	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	10543000	usd
CY2020	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	8238000	usd
CY2020	nwbi	Financing Receivable Modification Allowance For Credit Losses FinancingReceivableModificationAllowanceForCreditLosses	373000	usd
CY2022	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	25	contract
CY2022	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	21910000	usd
CY2021	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	18	contract
CY2021	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	14623000	usd
CY2020	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	18	contract
CY2020	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	8238000	usd
CY2022	nwbi	Financing Receivable Modifications Number Of Contracts Remodified FinancingReceivableModificationsNumberOfContractsRemodified	11	contract
CY2022	nwbi	Financing Receivable Remodifications Post Modification Recorded Investment FinancingReceivableRemodificationsPostModificationRecordedInvestment	588000	usd
CY2021	nwbi	Financing Receivable Modifications Number Of Contracts Remodified FinancingReceivableModificationsNumberOfContractsRemodified	9	contract
CY2021	nwbi	Financing Receivable Remodifications Post Modification Recorded Investment FinancingReceivableRemodificationsPostModificationRecordedInvestment	7370000	usd
CY2020	nwbi	Financing Receivable Modifications Number Of Contracts Remodified FinancingReceivableModificationsNumberOfContractsRemodified	5	contract
CY2020	nwbi	Financing Receivable Remodifications Post Modification Recorded Investment FinancingReceivableRemodificationsPostModificationRecordedInvestment	6780000	usd
CY2020	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0	contract
CY2022	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0	contract
CY2021	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	1	contract
CY2021	nwbi	Financing Receivable Modification That Subsequently Defaulted Pre Modification Recorded Investment FinancingReceivableModificationThatSubsequentlyDefaultedPreModificationRecordedInvestment	4167000	usd
CY2021	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	3823000	usd
CY2021	nwbi	Increase Decrease In Financing Receivable Modifications Recorded Investment Reserve IncreaseDecreaseInFinancingReceivableModificationsRecordedInvestmentReserve	0	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss Fee And Loan In Process FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcess	10920452000	usd
CY2022Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	744000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year One Originated Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear	2630339000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Two Originated Fiscal Year Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear	2099871000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Three Originated Two Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear	1415571000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Four Originated Three Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear	914933000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Five Originated Four Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear	575318000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Originated More Than Five Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear	2274805000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Revolving FinancingReceivableExcludingAccruedInterestRevolving	939858000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Revolving Converted To Term Loan FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoan	69757000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	10920452000	usd
CY2022	nwbi	Financing Receivable Excluding Accrued Interest Revolving Converted To Term Loan During The Period FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoanDuringThePeriod	20700000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year One Originated Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear	2316856000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Two Originated Fiscal Year Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear	1791969000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Three Originated Two Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear	1265376000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Four Originated Three Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear	773601000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Five Originated Four Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear	647737000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Originated More Than Five Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear	2334399000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Revolving FinancingReceivableExcludingAccruedInterestRevolving	803210000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Revolving Converted To Term Loan FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoan	83244000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	10016392000	usd
CY2021	nwbi	Financing Receivable Excluding Accrued Interest Revolving Converted To Term Loan During The Period FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoanDuringThePeriod	27300000	usd
CY2022Q4	us-gaap	Fair Value Disclosure Offbalance Sheet Risks Amount Liability FairValueDisclosureOffbalanceSheetRisksAmountLiability	1388311000	usd
CY2021Q4	us-gaap	Fair Value Disclosure Offbalance Sheet Risks Amount Liability FairValueDisclosureOffbalanceSheetRisksAmountLiability	1455387000	usd
CY2020Q4	nwbi	Servicing Asset At Amortized Value Gross ServicingAssetAtAmortizedValueGross	8657000	usd
CY2020Q4	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	492000	usd
CY2020Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	8165000	usd
CY2021	nwbi	Servicing Asset At Amortized Cost Additions Gross ServicingAssetAtAmortizedCostAdditionsGross	4604000	usd
CY2021	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Provisions Recoveries ValuationAllowanceForImpairmentOfRecognizedServicingAssetsProvisionsRecoveries	-481000	usd
CY2021	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	5085000	usd
CY2021	nwbi	Servicing Assets At Amortized Cost Amortization Gross ServicingAssetsAtAmortizedCostAmortizationGross	3095000	usd
CY2021	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	3095000	usd
CY2021Q4	nwbi	Servicing Asset At Amortized Value Gross ServicingAssetAtAmortizedValueGross	10166000	usd
CY2021Q4	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	11000	usd
CY2021Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	10155000	usd
CY2022	nwbi	Servicing Asset At Amortized Cost Additions Gross ServicingAssetAtAmortizedCostAdditionsGross	1282000	usd
CY2022	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Provisions Recoveries ValuationAllowanceForImpairmentOfRecognizedServicingAssetsProvisionsRecoveries	-4000	usd
CY2022	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	1286000	usd
CY2022	nwbi	Servicing Assets At Amortized Cost Amortization Gross ServicingAssetsAtAmortizedCostAmortizationGross	3646000	usd
CY2022	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	3646000	usd
CY2022Q4	nwbi	Servicing Asset At Amortized Value Gross ServicingAssetAtAmortizedValueGross	7802000	usd
CY2022Q4	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	7000	usd
CY2022Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	7795000	usd
CY2022Q4	nwbi	Accrued Interest Receivable On Investments AccruedInterestReceivableOnInvestments	1722000	usd
CY2021Q4	nwbi	Accrued Interest Receivable On Investments AccruedInterestReceivableOnInvestments	1591000	usd
CY2022Q4	nwbi	Accrued Interest Receivable On Fhld Dividends AccruedInterestReceivableOnFHLDDividends	391000	usd
CY2021Q4	nwbi	Accrued Interest Receivable On Fhld Dividends AccruedInterestReceivableOnFHLDDividends	89000	usd
CY2022Q4	nwbi	Accrued Interest Receivable On Mortgage Backed Securities AccruedInterestReceivableOnMortgageBackedSecurities	3020000	usd
CY2021Q4	nwbi	Accrued Interest Receivable On Mortgage Backed Securities AccruedInterestReceivableOnMortgageBackedSecurities	2589000	usd
CY2022Q4	nwbi	Accrued Interest Receivable On Loans AccruedInterestReceivableOnLoans	30395000	usd
CY2021Q4	nwbi	Accrued Interest Receivable On Loans AccruedInterestReceivableOnLoans	21330000	usd
CY2022Q4	us-gaap	Interest Receivable InterestReceivable	35528000	usd
CY2021Q4	us-gaap	Interest Receivable InterestReceivable	25599000	usd
CY2022	nwbi	Federal Home Loan Bank Stock Dividend Received FederalHomeLoanBankStockDividendReceived	730000	usd
CY2021	nwbi	Federal Home Loan Bank Stock Dividend Received FederalHomeLoanBankStockDividendReceived	407000	usd
CY2022Q4	nwbi	Number Of Subclasses Of Federal Home Loan Bank Of Pittsburgh Capital Stock Required To Invest In For Membership NumberOfSubclassesOfFederalHomeLoanBankOfPittsburghCapitalStockRequiredToInvestInForMembership	2	subclass
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	325697000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	336633000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	179788000	usd
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	180109000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	145909000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	156524000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	11600000	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	12100000	usd
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	11900000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	8560000	usd
CY2021Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	12836000	usd
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	6856000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	5553000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4277000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	3270000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	2452000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	1662000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	871000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	305000	usd
CY2022Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	2457569000	usd
CY2020Q4	us-gaap	Goodwill Goodwill	382279000	usd
CY2021	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	77000	usd
CY2021	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	1359000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	380997000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	380997000	usd
CY2022Q4	us-gaap	Noninterest Bearing Domestic Deposit Checking NoninterestBearingDomesticDepositChecking	2993243000	usd
CY2021Q4	us-gaap	Noninterest Bearing Domestic Deposit Checking NoninterestBearingDomesticDepositChecking	3099526000	usd
CY2022Q4	us-gaap	Interest Bearing Domestic Deposit Checking InterestBearingDomesticDepositChecking	2686431000	usd
CY2021Q4	us-gaap	Interest Bearing Domestic Deposit Checking InterestBearingDomesticDepositChecking	2940442000	usd
CY2021Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	2629882000	usd
CY2022Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	2275020000	usd
CY2021Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	2303760000	usd
CY2022Q4	us-gaap	Time Deposits TimeDeposits	1052285000	usd
CY2021Q4	us-gaap	Time Deposits TimeDeposits	1327555000	usd
CY2022Q4	us-gaap	Deposits Deposits	11464548000	usd
CY2021Q4	us-gaap	Deposits Deposits	12301165000	usd
CY2022Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	355000000	usd
CY2021Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	439500000	usd
CY2022Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	4031000000.000	usd
CY2021Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	4194000000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	754564000	usd
CY2021Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	890101000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	186803000	usd
CY2021Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	288284000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	46500000	usd
CY2021Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	80251000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	26734000	usd
CY2021Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	33843000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	33691000	usd
CY2021Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	29692000	usd
CY2022Q4	us-gaap	Time Deposit Maturities After Year Five TimeDepositMaturitiesAfterYearFive	3993000	usd
CY2021Q4	us-gaap	Time Deposit Maturities After Year Five TimeDepositMaturitiesAfterYearFive	5384000	usd
CY2022Q4	us-gaap	Time Deposits TimeDeposits	1052285000	usd
CY2021Q4	us-gaap	Time Deposits TimeDeposits	1327555000	usd
CY2022	us-gaap	Interest Expense Domestic Deposit Liabilities Checking InterestExpenseDomesticDepositLiabilitiesChecking	1517000	usd
CY2021	us-gaap	Interest Expense Domestic Deposit Liabilities Checking InterestExpenseDomesticDepositLiabilitiesChecking	1660000	usd
CY2020	us-gaap	Interest Expense Domestic Deposit Liabilities Checking InterestExpenseDomesticDepositLiabilitiesChecking	3358000	usd
CY2022	us-gaap	Interest Expense Money Market Deposits InterestExpenseMoneyMarketDeposits	3381000	usd
CY2021	us-gaap	Interest Expense Money Market Deposits InterestExpenseMoneyMarketDeposits	2597000	usd
CY2020	us-gaap	Interest Expense Money Market Deposits InterestExpenseMoneyMarketDeposits	7021000	usd
CY2022	us-gaap	Interest Expense Savings Deposits InterestExpenseSavingsDeposits	2339000	usd
CY2021	us-gaap	Interest Expense Savings Deposits InterestExpenseSavingsDeposits	2413000	usd
CY2020	us-gaap	Interest Expense Savings Deposits InterestExpenseSavingsDeposits	2614000	usd
CY2022	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	6883000	usd
CY2021	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	12452000	usd
CY2020	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	22903000	usd
CY2022	us-gaap	Interest Expense Deposits InterestExpenseDeposits	14120000	usd
CY2021	us-gaap	Interest Expense Deposits InterestExpenseDeposits	19122000	usd
CY2020	us-gaap	Interest Expense Deposits InterestExpenseDeposits	35896000	usd
CY2022Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	681166000	usd
CY2021Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	139093000	usd
CY2022Q4	nwbi	Debt Instrument Number Of Advances DebtInstrumentNumberOfAdvances	5	advance
CY2022Q4	nwbi	Number Of Statutory Business Trusts NumberOfStatutoryBusinessTrusts	7	business_trust
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	40026000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	46801000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	17672000	usd
CY2022	nwbi	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Available For Sale Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesAvailableForSaleArisingDuringPeriodTax	-45321000	usd
CY2021	nwbi	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Available For Sale Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesAvailableForSaleArisingDuringPeriodTax	-10425000	usd
CY2020	nwbi	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Available For Sale Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesAvailableForSaleArisingDuringPeriodTax	5061000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-6980000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-9659000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	3774000	usd
CY2022	nwbi	Income Tax Expense Benefit Unallocated IncomeTaxExpenseBenefitUnallocated	1685000	usd
CY2021	nwbi	Income Tax Expense Benefit Unallocated IncomeTaxExpenseBenefitUnallocated	46035000	usd
CY2020	nwbi	Income Tax Expense Benefit Unallocated IncomeTaxExpenseBenefitUnallocated	18959000	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	36235000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	24554000	usd
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	23968000	usd
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	9295000	usd
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	9933000	usd
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1788000	usd
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	45530000	usd
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	34487000	usd
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	25756000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-5325000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	10752000	usd
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-9072000	usd
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-179000	usd
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	1562000	usd
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	988000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-5504000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	12314000	usd
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-8084000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	40026000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	46801000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	17672000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.011
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.009
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.017
CY2022	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.040
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.045
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.022
CY2022	nwbi	Effective Income Tax Rate Reconciliation Tax Exempt Income Related To Bank Owned Life Insurance Percent EffectiveIncomeTaxRateReconciliationTaxExemptIncomeRelatedToBankOwnedLifeInsurancePercent	0.009
CY2021	nwbi	Effective Income Tax Rate Reconciliation Tax Exempt Income Related To Bank Owned Life Insurance Percent EffectiveIncomeTaxRateReconciliationTaxExemptIncomeRelatedToBankOwnedLifeInsurancePercent	0.006
CY2020	nwbi	Effective Income Tax Rate Reconciliation Tax Exempt Income Related To Bank Owned Life Insurance Percent EffectiveIncomeTaxRateReconciliationTaxExemptIncomeRelatedToBankOwnedLifeInsurancePercent	0.011
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	-0.001
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	0.001
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	-0.002
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends EffectiveIncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends	0.005
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends EffectiveIncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends	0.004
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends EffectiveIncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends	0.009
CY2022	nwbi	Effective Income Tax Rate Reconciliation Low Income Housing And Historic Tax Credits EffectiveIncomeTaxRateReconciliationLowIncomeHousingAndHistoricTaxCredits	0.002
CY2021	nwbi	Effective Income Tax Rate Reconciliation Low Income Housing And Historic Tax Credits EffectiveIncomeTaxRateReconciliationLowIncomeHousingAndHistoricTaxCredits	0.002
CY2020	nwbi	Effective Income Tax Rate Reconciliation Low Income Housing And Historic Tax Credits EffectiveIncomeTaxRateReconciliationLowIncomeHousingAndHistoricTaxCredits	0.009
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.006
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.003
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.230
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.233
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.191
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	4804000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	4230000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	27105000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	23273000	usd
CY2022Q4	nwbi	Deferred Tax Assets Other Reserves DeferredTaxAssetsOtherReserves	3554000	usd
CY2021Q4	nwbi	Deferred Tax Assets Other Reserves DeferredTaxAssetsOtherReserves	1333000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	502000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	900000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	652000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	623000	usd
CY2022Q4	nwbi	Deferred Tax Assets Expense Compensation And Pension Benefits And Other Postretirement Benefits DeferredTaxAssetsExpenseCompensationAndPensionBenefitsAndOtherPostretirementBenefits	2767000	usd
CY2021Q4	nwbi	Deferred Tax Assets Expense Compensation And Pension Benefits And Other Postretirement Benefits DeferredTaxAssetsExpenseCompensationAndPensionBenefitsAndOtherPostretirementBenefits	9747000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	49414000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	4093000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	95000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	341000	usd
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CY2022	dei	Auditor Location AuditorLocation	Pittsburgh, PA
CY2022	dei	Auditor Firm AuditorFirmId	185

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$NWBI
Northwest Bancshares, Inc. Stock $nwbi

2023 Q1 Form 10-K Financial Statement

#000147126523000013 Filed on February 24, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NWBI Northwest Bancshares, Inc. Stock $nwbi

2023 Q1 Form 10-K Financial Statement

#000147126523000013 Filed on February 24, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NWBI
Northwest Bancshares, Inc. Stock $nwbi