$NWBI
Northwest Bancshares, Inc. Stock $nwbi

$nwbi Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-Q Financial Statement

#000147126519000049 Filed on November 08, 2019

Income Statement

Concept	2019 Q4	2019 Q3	2018 Q3
Revenue	$103.4M	$106.9M	$95.61M
YoY Change	5.78%	11.78%	5.96%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin		$4.570M	$5.457M
YoY Change		-16.25%	-15.09%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$2.900M	-$500.0K	$900.0K
YoY Change	480.0%	-155.56%	-68.97%
% of Gross Profit
Operating Expenses		$4.570M	$5.457M
YoY Change		-16.25%	-15.09%
Operating Profit
YoY Change
Interest Expense	$14.47M	$15.93M	$9.788M
YoY Change	32.33%	62.75%	39.95%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$32.36M	$43.21M	$34.78M
YoY Change	-4.85%	24.25%	-3.42%
Income Tax	$6.773M	$9.793M	$7.035M
% Of Pretax Income	20.93%	22.67%	20.23%
Net Earnings	$25.60M	$33.40M	$27.70M
YoY Change	-3.4%	20.58%	17.37%
Net Earnings / Revenue	24.75%	31.25%	28.97%
Basic Earnings Per Share	$0.24	$0.32	$0.27
Diluted Earnings Per Share	$0.24	$0.31	$0.27
COMMON SHARES
Basic Shares Outstanding	106.7M shares	105.5M shares	102.3M shares
Diluted Shares Outstanding		106.3M shares	103.9M shares

Balance Sheet

Concept	2019 Q4	2019 Q3	2018 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$898.7M
YoY Change	0.64%
Cash & Equivalents	$60.85M	$107.6M	$73.95M
Short-Term Investments	$837.9M
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$147.4M	$148.8M	$144.6M
YoY Change	2.8%	2.89%	-5.33%
Goodwill	$346.1M	$344.7M	$307.4M
YoY Change	12.58%	12.13%	0.0%
Intangibles	$23.08M	$22.41M	$21.17M
YoY Change	16.42%	5.87%	-22.31%
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	$10.49B	$10.58B	$9.575B
YoY Change	9.22%	10.5%	1.22%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$1.000M	$1.000M	$1.000M
YoY Change	0.0%	0.0%	0.0%
Accrued Expenses	$52.00M	$52.00M
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$246.3M
YoY Change	5.1%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$53.00M	$53.00M	$1.000M
YoY Change	5200.0%	5200.0%	0.0%
LONG-TERM LIABILITIES
Long-Term Debt	$368.0M	$377.0M	$290.0M
YoY Change	6.36%	30.0%	27.75%
Other Long-Term Liabilities	$127.0M	$117.0M	$90.00M
YoY Change	15.45%	30.0%	5.88%
Total Long-Term Liabilities	$495.0M	$494.0M	$380.0M
YoY Change	8.55%	30.0%	21.79%
TOTAL LIABILITIES
Total Short-Term Liabilities	$53.00M	$53.00M	$1.000M
Total Long-Term Liabilities	$495.0M	$494.0M	$380.0M
Total Liabilities	$9.141B	$9.229B	$8.335B
YoY Change	9.47%	10.73%	0.98%
SHAREHOLDERS EQUITY
Retained Earnings	$583.4M	$577.0M	$541.5M
YoY Change	6.0%	6.57%	7.81%
Common Stock	$806.8M	$802.4M	$743.9M
YoY Change	8.01%	7.87%	2.02%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.353B	$1.352B	$1.241B
YoY Change
Total Liabilities & Shareholders Equity	$10.49B	$10.58B	$9.575B
YoY Change	9.22%	10.5%	1.22%

Cashflow Statement

Concept	2019 Q4	2019 Q3	2018 Q3
OPERATING ACTIVITIES
Net Income	$25.60M	$33.40M	$27.70M
YoY Change	-3.4%	20.58%	17.37%
Depreciation, Depletion And Amortization	$2.900M	-$500.0K	$900.0K
YoY Change	480.0%	-155.56%	-68.97%
Cash From Operating Activities	$16.80M	$29.70M	$39.70M
YoY Change	-48.31%	-25.19%	-10.59%
INVESTING ACTIVITIES
Capital Expenditures	-$1.600M	-$2.800M	-$1.700M
YoY Change	-11.11%	64.71%	41.67%
Acquisitions
YoY Change
Other Investing Activities	$32.50M	-$58.90M	-$78.80M
YoY Change	-194.48%	-25.25%	-346.25%
Cash From Investing Activities	$30.90M	-$61.70M	-$80.60M
YoY Change	-185.36%	-23.45%	-362.54%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-94.40M	32.50M	-18.10M
YoY Change	6193.33%	-279.56%	-72.66%
NET CHANGE
Cash From Operating Activities	16.80M	29.70M	39.70M
Cash From Investing Activities	30.90M	-61.70M	-80.60M
Cash From Financing Activities	-94.40M	32.50M	-18.10M
Net Change In Cash	-46.70M	500.0K	-59.00M
YoY Change	798.08%	-100.85%	-762.92%
FREE CASH FLOW
Cash From Operating Activities	$16.80M	$29.70M	$39.70M
Capital Expenditures	-$1.600M	-$2.800M	-$1.700M
Free Cash Flow	$18.40M	$32.50M	$41.40M
YoY Change	-46.36%	-21.5%	-9.21%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
	dei	Entity Central Index Key EntityCentralIndexKey	0001471265
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	nwbi	Cash Paid For Interest On Deposits CashPaidForInterestOnDeposits	32893000	USD
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	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2019-09-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	001-34582
	dei	Entity Registrant Name EntityRegistrantName	NORTHWEST BANCSHARES, INC.
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MD
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	27-0950358
	dei	Entity Address Address Line1 EntityAddressAddressLine1	100 Liberty Street
	dei	Entity Address City Or Town EntityAddressCityOrTown	Warren,
	dei	Entity Address State Or Province EntityAddressStateOrProvince	PA
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	16365
	dei	City Area Code CityAreaCode	814
	dei	Local Phone Number LocalPhoneNumber	726-2140
	dei	Entity Shell Company EntityShellCompany	false
	dei	Security12b Title Security12bTitle	Common Stock, 0.01 Par Value
	dei	Trading Symbol TradingSymbol	NWBI
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
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CY2018Q3	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	13158000	USD
	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	38940000	USD
	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	37965000	USD
CY2019Q3	nwbi	Fees And Commissions Trust Services And Other Income FeesAndCommissionsTrustServicesAndOtherIncome	4609000	USD
CY2018Q3	nwbi	Fees And Commissions Trust Services And Other Income FeesAndCommissionsTrustServicesAndOtherIncome	4254000	USD
	nwbi	Fees And Commissions Trust Services And Other Income FeesAndCommissionsTrustServicesAndOtherIncome	13248000	USD
	nwbi	Fees And Commissions Trust Services And Other Income FeesAndCommissionsTrustServicesAndOtherIncome	12335000	USD
CY2019Q3	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	1887000	USD
CY2018Q3	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	2046000	USD
	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	6210000	USD
	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	6885000	USD
CY2019Q3	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-227000	USD
CY2018Q3	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-247000	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-139000	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-617000	USD
CY2019Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1095000	USD
CY2018Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1460000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	3297000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	4783000	USD
CY2019Q3	nwbi	Mortgage Banking Income MortgageBankingIncome	1921000	USD
CY2018Q3	nwbi	Mortgage Banking Income MortgageBankingIncome	82000	USD
	nwbi	Mortgage Banking Income MortgageBankingIncome	2325000	USD
	nwbi	Mortgage Banking Income MortgageBankingIncome	383000	USD
CY2019Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	2500000	USD
CY2018Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	1804000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	6464000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	6567000	USD
CY2019Q3	us-gaap	Noninterest Income NoninterestIncome	26169000	USD
CY2018Q3	us-gaap	Noninterest Income NoninterestIncome	22557000	USD
	us-gaap	Noninterest Income NoninterestIncome	71194000	USD
	us-gaap	Noninterest Income NoninterestIncome	68454000	USD
CY2019Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	40816000	USD
CY2018Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	37535000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	121012000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	113076000	USD
CY2019Q3	us-gaap	Occupancy Net OccupancyNet	7061000	USD
CY2018Q3	us-gaap	Occupancy Net OccupancyNet	6821000	USD
	us-gaap	Occupancy Net OccupancyNet	21666000	USD
	us-gaap	Occupancy Net OccupancyNet	20952000	USD
CY2019Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	3197000	USD
CY2018Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	3508000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	10036000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	10684000	USD
CY2019Q3	nwbi	Noninterest Expense Collection Of Receivables NoninterestExpenseCollectionOfReceivables	747000	USD
CY2018Q3	nwbi	Noninterest Expense Collection Of Receivables NoninterestExpenseCollectionOfReceivables	483000	USD
	nwbi	Noninterest Expense Collection Of Receivables NoninterestExpenseCollectionOfReceivables	1994000	USD
	nwbi	Noninterest Expense Collection Of Receivables NoninterestExpenseCollectionOfReceivables	1429000	USD
CY2019Q3	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	11122000	USD
CY2018Q3	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	9620000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	32190000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	28886000	USD
CY2019Q3	us-gaap	Marketing Expense MarketingExpense	1373000	USD
CY2018Q3	us-gaap	Marketing Expense MarketingExpense	1949000	USD
	us-gaap	Marketing Expense MarketingExpense	5988000	USD
	us-gaap	Marketing Expense MarketingExpense	6103000	USD
CY2019Q3	nwbi	Federal Deposit Insurance Corporation Premium Expense Net FederalDepositInsuranceCorporationPremiumExpenseNet	-702000	USD
CY2018Q3	nwbi	Federal Deposit Insurance Corporation Premium Expense Net FederalDepositInsuranceCorporationPremiumExpenseNet	721000	USD
	nwbi	Federal Deposit Insurance Corporation Premium Expense Net FederalDepositInsuranceCorporationPremiumExpenseNet	685000	USD
	nwbi	Federal Deposit Insurance Corporation Premium Expense Net FederalDepositInsuranceCorporationPremiumExpenseNet	2109000	USD
CY2019Q3	us-gaap	Professional Fees ProfessionalFees	3032000	USD
CY2018Q3	us-gaap	Professional Fees ProfessionalFees	2368000	USD
	us-gaap	Professional Fees ProfessionalFees	8754000	USD
	us-gaap	Professional Fees ProfessionalFees	7464000	USD
CY2019Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1702000	USD
CY2018Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1462000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4909000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4502000	USD
CY2019Q3	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	119000	USD
CY2018Q3	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	205000	USD
	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	406000	USD
	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	630000	USD
CY2019Q3	nwbi	Restructuring And Acquisition Related Costs RestructuringAndAcquisitionRelatedCosts	23000	USD
CY2018Q3	nwbi	Restructuring And Acquisition Related Costs RestructuringAndAcquisitionRelatedCosts	186000	USD
	nwbi	Restructuring And Acquisition Related Costs RestructuringAndAcquisitionRelatedCosts	3054000	USD
	nwbi	Restructuring And Acquisition Related Costs RestructuringAndAcquisitionRelatedCosts	579000	USD
CY2019Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	2106000	USD
CY2018Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1759000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	8838000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	7411000	USD
CY2019Q3	us-gaap	Noninterest Expense NoninterestExpense	70596000	USD
CY2018Q3	us-gaap	Noninterest Expense NoninterestExpense	66617000	USD
	us-gaap	Noninterest Expense NoninterestExpense	219532000	USD
	us-gaap	Noninterest Expense NoninterestExpense	203825000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	43207000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	34775000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	108747000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	99899000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9793000	USD
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7035000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	23906000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	20875000	USD
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	33414000	USD
CY2018Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	27740000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	84841000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	79024000	USD
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.32
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.27
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.81
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.78
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.31
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.27
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.80
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.76
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	33414000	USD
CY2018Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	27740000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	84841000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	79024000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1315000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-1970000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	11376000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-7169000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	1000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	44000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	3000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	138000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	1314000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-2014000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	11373000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-7307000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	0	USD
CY2018Q3	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	192000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	0	USD
	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	766000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-208000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-226000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-626000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-678000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1522000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1596000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	11999000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-5863000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	34936000	USD
CY2018Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	26144000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	96840000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	73161000	USD
CY2019Q2	us-gaap	Stockholders Equity StockholdersEquity	1333588000	USD
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	33414000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1522000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	34936000	USD
CY2019Q3	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	757000	USD
CY2019Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1684000	USD
CY2019Q3	us-gaap	Stock Granted During Period Value Sharebased Compensation Forfeited StockGrantedDuringPeriodValueSharebasedCompensationForfeited	0	USD
CY2019Q3	us-gaap	Dividends Cash DividendsCash	19195000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	1351770000	USD
CY2018Q2	us-gaap	Stockholders Equity StockholdersEquity	1228880000	USD
CY2018Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	27740000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1596000	USD
CY2018Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	26144000	USD
CY2018Q3	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1920000	USD
CY2018Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1272000	USD
CY2018Q3	us-gaap	Stock Granted During Period Value Sharebased Compensation Forfeited StockGrantedDuringPeriodValueSharebasedCompensationForfeited	0	USD
CY2018Q3	us-gaap	Dividends Cash DividendsCash	17540000	USD
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	1240676000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	1257638000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	84841000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	11999000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	96840000	USD
	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	43288000	USD
CY2019Q1	us-gaap	Cumulative Effect Of New Accounting Principle In Period Of Adoption CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	-1226000	USD
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	6783000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	5418000	USD
	us-gaap	Stock Granted During Period Value Sharebased Compensation Forfeited StockGrantedDuringPeriodValueSharebasedCompensationForfeited	0	USD
	us-gaap	Dividends Cash DividendsCash	56971000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	1351770000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	1207724000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	79024000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-5863000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	73161000	USD
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	7602000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	4548000	USD
	us-gaap	Stock Granted During Period Value Sharebased Compensation Forfeited StockGrantedDuringPeriodValueSharebasedCompensationForfeited	0	USD
	us-gaap	Dividends Cash DividendsCash	52359000	USD
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	1240676000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	84841000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	79024000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	14436000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	16540000	USD
	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	490000	USD
	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	-1758000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	927000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	7598000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	64306000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	8952000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	74974000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	48000	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-677000	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-1317000	USD
	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	548000	USD
	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	1281000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1706000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	22000	USD
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	31776000	USD
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	1297000	USD
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	23764000	USD
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	4501000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	5418000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	4548000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	110719000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	106388000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	123655000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	215242000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	3788000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	5439000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	178775000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	179640000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	32389000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	5206000	USD
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	2638000	USD
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	357000	USD
	nwbi	Originations Of Loans Receivable Held For Investment OriginationsOfLoansReceivableHeldForInvestment	2724061000	USD
	nwbi	Originations Of Loans Receivable Held For Investment OriginationsOfLoansReceivableHeldForInvestment	2256146000	USD
	us-gaap	Proceeds From Principal Repayments On Loans And Leases Held For Investment ProceedsFromPrincipalRepaymentsOnLoansAndLeasesHeldForInvestment	2288521000	USD
	us-gaap	Proceeds From Principal Repayments On Loans And Leases Held For Investment ProceedsFromPrincipalRepaymentsOnLoansAndLeasesHeldForInvestment	2036656000	USD
	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	46783000	USD
	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	0	USD
	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	5313000	USD
	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	3719000	USD
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	3274000	USD
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	5082000	USD
	us-gaap	Net Income Loss From Real Estate Investment Partnership Attributable To Parent NetIncomeLossFromRealEstateInvestmentPartnershipAttributableToParent	-456000	USD
	us-gaap	Net Income Loss From Real Estate Investment Partnership Attributable To Parent NetIncomeLossFromRealEstateInvestmentPartnershipAttributableToParent	-455000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	9302000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3438000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	25834000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-331541000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-245710000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	307942000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	126964000	USD
	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	20868000	USD
	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	70879000	USD
	us-gaap	Increase Decrease In Advance Payments By Borrowers For Taxes And Insurance IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance	-18987000	USD
	us-gaap	Increase Decrease In Advance Payments By Borrowers For Taxes And Insurance IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance	-17528000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	56971000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	52359000	USD
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	6783000	USD
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	7602000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	259635000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	135558000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	38813000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-3764000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	68789000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	77710000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	38813000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-3764000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	107602000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	73946000	USD
	nwbi	Cash Paid For Interest On Deposits And Borrowings CashPaidForInterestOnDepositsAndBorrowings	39632000	USD
	nwbi	Cash Paid For Interest On Deposits And Borrowings CashPaidForInterestOnDepositsAndBorrowings	26036000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	15052000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	19299000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Value Of Assets Acquired1 NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1	580407000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Value Of Assets Acquired1 NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1	0	USD
	us-gaap	Stock Issued1 StockIssued1	43288000	USD
	us-gaap	Stock Issued1 StockIssued1	0	USD
	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	42500000	USD
	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	0	USD
	us-gaap	Noncash Or Part Noncash Acquisition Net Nonmonetary Assets Acquired Liabilities Assumed1 NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1	494619000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Net Nonmonetary Assets Acquired Liabilities Assumed1 NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1	0	USD
	nwbi	Transfer Of Other Real Estate And Other Repossessed Personal Property TransferOfOtherRealEstateAndOtherRepossessedPersonalProperty	4349000	USD
	nwbi	Transfer Of Other Real Estate And Other Repossessed Personal Property TransferOfOtherRealEstateAndOtherRepossessedPersonalProperty	5034000	USD
	nwbi	Sale And Financing Of Other Real Estate Owned SaleAndFinancingOfOtherRealEstateOwned	44000	USD
	nwbi	Sale And Financing Of Other Real Estate Owned SaleAndFinancingOfOtherRealEstateOwned	183000	USD
CY2019Q3	nwbi	Number Of Banking Locations NumberOfBankingLocations	182	bank
CY2019Q2	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	17.27
CY2019Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	1.14
CY2019Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1700000	USD
CY2018Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1300000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	5400000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	4500000	USD
CY2019Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2019Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	1443000	USD
	us-gaap	Operating Lease Cost OperatingLeaseCost	4124000	USD
CY2019Q3	us-gaap	Variable Lease Cost VariableLeaseCost	264000	USD
	us-gaap	Variable Lease Cost VariableLeaseCost	455000	USD
CY2019Q3	us-gaap	Lease Cost LeaseCost	1707000	USD
	us-gaap	Lease Cost LeaseCost	4579000	USD
CY2019Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	48857000	USD
CY2019Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	51531000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	4132000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	11518000	USD
CY2019Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P15Y8M12D
CY2019Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.037
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	1444000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	5447000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	5115000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	4814000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	4559000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	49087000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	70466000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	18935000	USD
CY2019Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	51531000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	4677000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	3884000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	3179000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	2465000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	2040000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	7784000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	24029000	USD
CY2019Q3	nwbi	Allowancefor Credit Losses Changesin Methodof Calculating Impairment AllowanceforCreditLossesChangesinMethodofCalculatingImpairment	3007000	USD
CY2019Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	801465000	USD
CY2019Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	9195000	USD
CY2019Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	2837000	USD
CY2019Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	807823000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	811015000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	2958000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	12523000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	801450000	USD
CY2019Q3	us-gaap	Held To Maturity Securities Amortized Cost Before Other Than Temporary Impairment HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment	18958000	USD
CY2019Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	279000	USD
CY2019Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	0	USD
CY2019Q3	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	19237000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Amortized Cost Before Other Than Temporary Impairment HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment	22765000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	103000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	422000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	22446000	USD
CY2019Q3	nwbi	Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	79196000	USD
CY2019Q3	nwbi	Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses1 HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses1	287000	USD
CY2019Q3	nwbi	Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	191493000	USD
CY2019Q3	nwbi	Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses2 HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses2	2550000	USD
CY2019Q3	nwbi	Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position Fair Value HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	270689000	USD
CY2019Q3	nwbi	Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position Aggregate Losses1 HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses1	2837000	USD
CY2018Q4	nwbi	Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	34960000	USD
CY2018Q4	nwbi	Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses1 HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses1	31000	USD
CY2018Q4	nwbi	Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	484809000	USD
CY2018Q4	nwbi	Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses2 HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses2	12915000	USD
CY2018Q4	nwbi	Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position Fair Value HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	519769000	USD
CY2018Q4	nwbi	Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position Aggregate Losses1 HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses1	12946000	USD
CY2018Q4	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	0	USD
CY2017Q4	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	352000	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment	0	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment	0	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold	0	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold	0	USD
	nwbi	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Called OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesCalled	0	USD
	nwbi	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Called OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesCalled	352000	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	0	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	0	USD
CY2019Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	0	USD
CY2018Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	0	USD
CY2019Q3	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	9063565000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	8257652000	USD
CY2019Q3	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	50455000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	37618000	USD
CY2019Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	52859000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	55214000	USD
CY2019Q3	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	8799158000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	7996225000	USD
CY2017Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	1540000	USD
CY2018	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	785000	USD
CY2018	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference	0	USD
CY2018Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	755000	USD
	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	382000	USD
	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference	938000	USD
CY2019Q3	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	1311000	USD
CY2019Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	52859000	USD
CY2019Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	3302000	USD
CY2019Q3	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	5274000	USD
CY2019Q3	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	1724000	USD
CY2019Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	53107000	USD
CY2018Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	55975000	USD
CY2018Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	6982000	USD
CY2018Q3	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	10399000	USD
CY2018Q3	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	2060000	USD
CY2018Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	57332000	USD
CY2019Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	52859000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	14436000	USD
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	21485000	USD
	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	4694000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	55214000	USD
CY2018Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	55975000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	16540000	USD
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	22483000	USD
	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	5123000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	56795000	USD
CY2019Q3	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	8852017000	USD
CY2019Q3	nwbi	Loans And Leases Receivable Allowance Excluding Unallocated LoansAndLeasesReceivableAllowanceExcludingUnallocated	52859000	USD
CY2019Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	65657000	USD
CY2019Q3	nwbi	Financing Receivable Recorded Investment90 Days Or More Past Maturity And Still Accruing FinancingReceivableRecordedInvestment90DaysOrMorePastMaturityAndStillAccruing	85000	USD
CY2019Q3	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	30300000	USD
CY2018Q4	nwbi	Financing Receivable Modifications Recorded Investment Additional Commitment FinancingReceivableModificationsRecordedInvestmentAdditionalCommitment	388000	USD
CY2018Q4	nwbi	Financing Receivable Modifications Recorded Investment Non Accrual FinancingReceivableModificationsRecordedInvestmentNonAccrual	15300000	USD
CY2019Q3	nwbi	Financing Receivable Modifications Recorded Investment Additional Commitment FinancingReceivableModificationsRecordedInvestmentAdditionalCommitment	671000	USD
CY2019Q3	nwbi	Financing Receivable Modifications Recorded Investment Non Accrual FinancingReceivableModificationsRecordedInvestmentNonAccrual	9100000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	8051439000	USD
CY2018Q4	nwbi	Loans And Leases Receivable Allowance Excluding Unallocated LoansAndLeasesReceivableAllowanceExcludingUnallocated	55214000	USD
CY2018Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	72281000	USD
CY2018Q4	nwbi	Financing Receivable Recorded Investment90 Days Or More Past Maturity And Still Accruing FinancingReceivableRecordedInvestment90DaysOrMorePastMaturityAndStillAccruing	166000	USD
CY2018Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	33608000	USD
CY2018Q4	nwbi	Allowancefor Credit Losses Changesin Methodof Calculating Impairment AllowanceforCreditLossesChangesinMethodofCalculatingImpairment	3089000	USD
CY2019Q3	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	88805000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	87902000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	2750000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	98283000	USD
CY2018	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	84338000	USD
CY2018	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	3762000	USD
CY2019Q3	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	8801237000	USD
CY2019Q3	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	50780000	USD
CY2019Q3	nwbi	Financing Receivable Individually Evaluated For Impairment Reserved FinancingReceivableIndividuallyEvaluatedForImpairmentReserved	45612000	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	5010000	USD
CY2019Q3	nwbi	Financing Receivable Individually Evaluated For Impairment Not Reserved FinancingReceivableIndividuallyEvaluatedForImpairmentNotReserved	5168000	USD
CY2018Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	7997835000	USD
CY2018Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	53604000	USD
CY2018Q4	nwbi	Financing Receivable Individually Evaluated For Impairment Reserved FinancingReceivableIndividuallyEvaluatedForImpairmentReserved	48875000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	8542000	USD
CY2018Q4	nwbi	Financing Receivable Individually Evaluated For Impairment Not Reserved FinancingReceivableIndividuallyEvaluatedForImpairmentNotReserved	4729000	USD
CY2019Q2	nwbi	Financing Receivable Modifications Outstanding Number Of Contracts FinancingReceivableModificationsOutstandingNumberOfContracts	183	contract
CY2019Q2	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	31269000	USD
CY2018Q2	nwbi	Financing Receivable Modifications Outstanding Number Of Contracts FinancingReceivableModificationsOutstandingNumberOfContracts	205	contract
CY2018Q2	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	30662000	USD
CY2019Q3	nwbi	Financing Receivable Modifications Number Of Contracts2 Additions FinancingReceivableModificationsNumberOfContracts2Additions	3	contract
CY2019Q3	nwbi	Financing Receivable Modifications Recorded Investment Additions FinancingReceivableModificationsRecordedInvestmentAdditions	520000	USD
CY2018Q3	nwbi	Financing Receivable Modifications Number Of Contracts2 Additions FinancingReceivableModificationsNumberOfContracts2Additions	7	contract
CY2018Q3	nwbi	Financing Receivable Modifications Recorded Investment Additions FinancingReceivableModificationsRecordedInvestmentAdditions	647000	USD
CY2019Q3	nwbi	Financing Receivable Modifications Number Of Contracts Remodified FinancingReceivableModificationsNumberOfContractsRemodified	8	contract
CY2019Q3	nwbi	Financing Receivable Modifications Recorded Investment Re Modifications FinancingReceivableModificationsRecordedInvestmentReModifications	4773000	USD
CY2018Q3	nwbi	Financing Receivable Modifications Number Of Contracts Remodified FinancingReceivableModificationsNumberOfContractsRemodified	3	contract
CY2018Q3	nwbi	Financing Receivable Modifications Recorded Investment Re Modifications FinancingReceivableModificationsRecordedInvestmentReModifications	306000	USD
CY2019Q3	nwbi	Financing Receivable Modifications Recorded Investment Net Paydowns FinancingReceivableModificationsRecordedInvestmentNetPaydowns	5668000	USD
CY2018Q3	nwbi	Financing Receivable Modifications Recorded Investment Net Paydowns FinancingReceivableModificationsRecordedInvestmentNetPaydowns	1215000	USD
CY2019Q3	nwbi	Financing Receivable Modifications Outstanding Number Of Contracts FinancingReceivableModificationsOutstandingNumberOfContracts	177	contract
CY2019Q3	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	30300000	USD
CY2018Q3	nwbi	Financing Receivable Modifications Outstanding Number Of Contracts FinancingReceivableModificationsOutstandingNumberOfContracts	197	contract
CY2018Q3	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	29147000	USD
CY2019Q3	nwbi	Financing Receivable Modifications Recorded Investment Accrual FinancingReceivableModificationsRecordedInvestmentAccrual	21162000	USD
CY2018Q3	nwbi	Financing Receivable Modifications Recorded Investment Accrual FinancingReceivableModificationsRecordedInvestmentAccrual	19370000	USD
CY2019Q3	nwbi	Financing Receivable Modifications Recorded Investment Non Accrual FinancingReceivableModificationsRecordedInvestmentNonAccrual	9138000	USD
CY2018Q3	nwbi	Financing Receivable Modifications Recorded Investment Non Accrual FinancingReceivableModificationsRecordedInvestmentNonAccrual	9777000	USD
CY2018Q4	nwbi	Financing Receivable Modifications Outstanding Number Of Contracts FinancingReceivableModificationsOutstandingNumberOfContracts	195	contract
CY2018Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	33608000	USD
CY2017Q4	nwbi	Financing Receivable Modifications Outstanding Number Of Contracts FinancingReceivableModificationsOutstandingNumberOfContracts	205	contract
CY2017Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	32104000	USD
	nwbi	Financing Receivable Modifications Number Of Contracts2 Additions FinancingReceivableModificationsNumberOfContracts2Additions	5	contract
	nwbi	Financing Receivable Modifications Recorded Investment Additions FinancingReceivableModificationsRecordedInvestmentAdditions	826000	USD
	nwbi	Financing Receivable Modifications Number Of Contracts2 Additions FinancingReceivableModificationsNumberOfContracts2Additions	26	contract
	nwbi	Financing Receivable Modifications Recorded Investment Additions FinancingReceivableModificationsRecordedInvestmentAdditions	6443000	USD
	nwbi	Financing Receivable Modifications Number Of Contracts Remodified FinancingReceivableModificationsNumberOfContractsRemodified	8	contract
	nwbi	Financing Receivable Modifications Recorded Investment Re Modifications FinancingReceivableModificationsRecordedInvestmentReModifications	4773000	USD
	nwbi	Financing Receivable Modifications Number Of Contracts Remodified FinancingReceivableModificationsNumberOfContractsRemodified	3	contract
	nwbi	Financing Receivable Modifications Recorded Investment Re Modifications FinancingReceivableModificationsRecordedInvestmentReModifications	306000	USD
	nwbi	Financing Receivable Modifications Recorded Investment Net Paydowns FinancingReceivableModificationsRecordedInvestmentNetPaydowns	6454000	USD
	nwbi	Financing Receivable Modifications Recorded Investment Net Paydowns FinancingReceivableModificationsRecordedInvestmentNetPaydowns	3037000	USD
CY2019Q3	nwbi	Financing Receivable Modifications Outstanding Number Of Contracts FinancingReceivableModificationsOutstandingNumberOfContracts	177	contract
CY2019Q3	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	30300000	USD
CY2018Q3	nwbi	Financing Receivable Modifications Outstanding Number Of Contracts FinancingReceivableModificationsOutstandingNumberOfContracts	197	contract
CY2018Q3	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	29147000	USD
CY2019Q3	nwbi	Financing Receivable Modifications Recorded Investment Accrual FinancingReceivableModificationsRecordedInvestmentAccrual	21162000	USD
CY2018Q3	nwbi	Financing Receivable Modifications Recorded Investment Accrual FinancingReceivableModificationsRecordedInvestmentAccrual	19370000	USD
CY2019Q3	nwbi	Financing Receivable Modifications Recorded Investment Non Accrual FinancingReceivableModificationsRecordedInvestmentNonAccrual	9138000	USD
CY2018Q3	nwbi	Financing Receivable Modifications Recorded Investment Non Accrual FinancingReceivableModificationsRecordedInvestmentNonAccrual	9777000	USD
CY2019Q3	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	11	contract
CY2019Q3	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	6202000	USD
CY2019Q3	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	5293000	USD
CY2019Q3	nwbi	Financing Receivable Modification Allowance For Credit Losses FinancingReceivableModificationAllowanceForCreditLosses	563000	USD
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	13	contract
	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	6512000	USD
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	5599000	USD
	nwbi	Financing Receivable Modification Allowance For Credit Losses FinancingReceivableModificationAllowanceForCreditLosses	596000	USD
CY2018Q3	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	10	contract
CY2018Q3	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	953000	USD
CY2018Q3	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	941000	USD
CY2018Q3	nwbi	Financing Receivable Modification Allowance For Credit Losses FinancingReceivableModificationAllowanceForCreditLosses	129000	USD
CY2019Q3	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	1	contract
CY2019Q3	nwbi	Financing Receivable Modification That Subsequently Defaulted Pre Modification Recorded Investment FinancingReceivableModificationThatSubsequentlyDefaultedPreModificationRecordedInvestment	134000	USD
CY2019Q3	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	126000	USD
CY2019Q3	nwbi	Increase Decrease In Financing Receivable Modifications Recorded Investment Reserve IncreaseDecreaseInFinancingReceivableModificationsRecordedInvestmentReserve	104000	USD
	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	4	contract
	nwbi	Financing Receivable Modification That Subsequently Defaulted Pre Modification Recorded Investment FinancingReceivableModificationThatSubsequentlyDefaultedPreModificationRecordedInvestment	3069000	USD
	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	3051000	USD
	nwbi	Increase Decrease In Financing Receivable Modifications Recorded Investment Reserve IncreaseDecreaseInFinancingReceivableModificationsRecordedInvestmentReserve	109000	USD
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	29	contract
	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	6749000	USD
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	5756000	USD
	nwbi	Financing Receivable Modification Allowance For Credit Losses FinancingReceivableModificationAllowanceForCreditLosses	293000	USD
	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0	contract
CY2019Q3	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	11	contract
CY2019Q3	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	5293000	USD
CY2018Q3	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	10	contract
CY2018Q3	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	941000	USD
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	13	contract
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	5599000	USD
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	29	contract
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	5756000	USD
	nwbi	Financing Receivable Modifications Number Of Contracts Remodified FinancingReceivableModificationsNumberOfContractsRemodified	8
	nwbi	Financing Receivable Modifications Number Of Contracts Remodified FinancingReceivableModificationsNumberOfContractsRemodified	3
CY2019Q3	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	81030000	USD
CY2019Q3	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	8770987000	USD
CY2019Q3	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	8852017000	USD
CY2019Q3	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	95000	USD
CY2018Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	121534000	USD
CY2018Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	7929905000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	8051439000	USD
CY2018Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	143000	USD
CY2019Q3	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	8852017000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	8051439000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	22410000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	19821000	USD
CY2019Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1702000	USD
CY2018Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1462000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4909000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4502000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear	6495000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	5669000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	4572000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	3572000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	2695000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	2010000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	307420000	USD
CY2018	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	USD
CY2018Q4	us-gaap	Goodwill Goodwill	307420000	USD
	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	37300000	USD
CY2019Q3	us-gaap	Goodwill Goodwill	344720000	USD
CY2019Q1	nwbi	Number Of Business Trusts Owned NumberOfBusinessTrustsOwned	3	trust
CY2019Q1	nwbi	Numberof Additional Business Trusts Owned NumberofAdditionalBusinessTrustsOwned	2	trust
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	33414000	USD
CY2018Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	27740000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	84841000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	79024000	USD
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	105517707	shares
CY2018Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	102334954	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	104626560	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	101937338	shares
CY2019Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	752837	shares
CY2018Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1607741	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1055055	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1566731	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	106270544	shares
CY2018Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	103942695	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	105681615	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	103504069	shares
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.32
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.27
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.81
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.78
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.31
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.27
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.80
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.76
	nwbi	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Financial Instruments Total Unrealized Gains Losses Period Increase Decrease FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisFinancialInstrumentsTotalUnrealizedGainsLossesPeriodIncreaseDecrease	0	USD
CY2019Q3	us-gaap	Derivative Asset Notional Amount DerivativeAssetNotionalAmount	350324000	USD
CY2019Q3	us-gaap	Derivative Assets DerivativeAssets	26901000	USD
CY2019Q3	us-gaap	Derivative Liability Notional Amount DerivativeLiabilityNotionalAmount	317086000	USD
CY2019Q3	us-gaap	Derivative Liabilities DerivativeLiabilities	26257000	USD
CY2018Q4	us-gaap	Derivative Asset Notional Amount DerivativeAssetNotionalAmount	221919000	USD
CY2018Q4	us-gaap	Derivative Assets DerivativeAssets	6445000	USD
CY2018Q4	us-gaap	Derivative Liability Notional Amount DerivativeLiabilityNotionalAmount	221919000	USD
CY2018Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	6445000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	0	USD
CY2018Q3	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	257000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	0	USD
	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	857000	USD
CY2019Q3	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	1315000	USD
CY2019Q3	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	-207000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1522000	USD
CY2018Q3	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	-1778000	USD
CY2018Q3	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	-182000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1596000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-525000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	1000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	USD
CY2019Q3	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	-581000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	890000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	83000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	788000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxPortionAttributableToParent	51000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	61000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	17000	USD
CY2018Q3	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	581000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-897000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	90000	USD
	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	11376000	USD
	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	-623000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	11999000	USD
	us-gaap	Tax Cuts And Jobs Act Of2017 Reclassification From Aoci To Retained Earnings Tax Effect TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect	-6746000	USD
	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	-6403000	USD
	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	-540000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-5863000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-4549000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	1000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	1000	USD
	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	-1742000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	2669000	USD
	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	250000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	2869000	USD
	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxPortionAttributableToParent	204000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	192000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	54000	USD
	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	1742000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-2691000	USD
	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	271000	USD

Files In Submission

Name	View Source	Status
0001471265-19-000049-index-headers.html	Edgar Link	pending
0001471265-19-000049-index.html	Edgar Link	pending
0001471265-19-000049.txt	Edgar Link	pending
0001471265-19-000049-xbrl.zip	Edgar Link	pending
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$NWBI
Northwest Bancshares, Inc. Stock $nwbi

2019 Q4 Form 10-Q Financial Statement

#000147126519000049 Filed on November 08, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NWBI Northwest Bancshares, Inc. Stock $nwbi

2019 Q4 Form 10-Q Financial Statement

#000147126519000049 Filed on November 08, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NWBI
Northwest Bancshares, Inc. Stock $nwbi