$NWBI
Northwest Bancshares, Inc. Stock $nwbi

$nwbi Overview Financials Valuation SEC Filings Company Website

2013 Q1 Form 10-Q Financial Statement

#000110465913039924 Filed on May 10, 2013

Income Statement

Concept	2013 Q1	2012 Q1
Revenue	$79.48M	$86.03M
YoY Change	-7.62%	-5.36%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin	$5.168M	$5.360M
YoY Change	-3.58%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$3.100M	$2.500M
YoY Change	24.0%	-39.02%
% of Gross Profit
Operating Expenses	$5.168M	$5.360M
YoY Change	-3.58%
Operating Profit
YoY Change
Interest Expense	$15.65M	$20.84M
YoY Change	-24.94%	-13.34%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$21.54M	$21.48M
YoY Change	0.27%	-13.18%
Income Tax	$6.357M	$6.302M
% Of Pretax Income	29.51%	29.33%
Net Earnings	$15.30M	$15.20M
YoY Change	0.66%	-12.14%
Net Earnings / Revenue	19.25%	17.67%
Basic Earnings Per Share	$0.17	$0.16
Diluted Earnings Per Share	$0.17	$0.16
COMMON SHARES
Basic Shares Outstanding	90.40M shares	94.12M shares
Diluted Shares Outstanding	90.88M shares	94.67M shares

Balance Sheet

Concept	2013 Q1	2012 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$585.2M	$758.9M
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	$139.0M	$134.0M
YoY Change	3.69%	5.51%
Goodwill	$174.5M
YoY Change
Intangibles	$3.181M
YoY Change
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	$7.994B	$8.069B
YoY Change	-0.92%	-0.65%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$1.000M	$1.000M
YoY Change	0.0%	0.0%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$860.0M	$836.0M
YoY Change	2.87%	0.48%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$1.000M	$1.000M
YoY Change	0.0%	0.0%
LONG-TERM LIABILITIES
Long-Term Debt	$103.0M	$103.0M
YoY Change	0.0%	0.0%
Other Long-Term Liabilities	$55.00M	$68.00M
YoY Change	-19.12%	28.3%
Total Long-Term Liabilities	$158.0M	$171.0M
YoY Change	-7.6%	9.62%
TOTAL LIABILITIES
Total Short-Term Liabilities	$1.000M	$1.000M
Total Long-Term Liabilities	$158.0M	$171.0M
Total Liabilities	$6.847B	$6.907B
YoY Change	-0.87%	1.05%
SHAREHOLDERS EQUITY
Retained Earnings	$565.6M
YoY Change
Common Stock	$616.1M
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.148B	$1.163B
YoY Change
Total Liabilities & Shareholders Equity	$7.994B	$8.069B
YoY Change	-0.92%	-0.65%

Cashflow Statement

Concept	2013 Q1	2012 Q1
OPERATING ACTIVITIES
Net Income	$15.30M	$15.20M
YoY Change	0.66%	-12.14%
Depreciation, Depletion And Amortization	$3.100M	$2.500M
YoY Change	24.0%	-39.02%
Cash From Operating Activities	$42.20M	$26.20M
YoY Change	61.07%	-38.06%
INVESTING ACTIVITIES
Capital Expenditures	$3.284M	$4.346M
YoY Change	-24.44%	-328.74%
Acquisitions
YoY Change
Other Investing Activities	$54.10M	-$42.60M
YoY Change	-227.0%	-182.24%
Cash From Investing Activities	$50.80M	-$47.00M
YoY Change	-208.09%	-194.19%
FINANCING ACTIVITIES
Cash Dividend Paid		$11.43M
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net	$17.00K	$17.00K
YoY Change	0.0%
Cash From Financing Activities	40.40M	91.40M
YoY Change	-55.8%	-319.71%
NET CHANGE
Cash From Operating Activities	42.20M	26.20M
Cash From Investing Activities	50.80M	-47.00M
Cash From Financing Activities	40.40M	91.40M
Net Change In Cash	133.4M	70.60M
YoY Change	88.95%	39.53%
FREE CASH FLOW
Cash From Operating Activities	$42.20M	$26.20M
Capital Expenditures	$3.284M	$4.346M
Free Cash Flow	$38.92M	$21.85M
YoY Change	78.07%	-50.56%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2013Q1	dei	Entity Registrant Name EntityRegistrantName	Northwest Bancshares, Inc.
CY2013Q1	dei	Entity Central Index Key EntityCentralIndexKey	0001471265
CY2013Q1	dei	Document Type DocumentType	10-Q
CY2013Q1	dei	Document Period End Date DocumentPeriodEndDate	2013-03-31
CY2013Q1	dei	Amendment Flag AmendmentFlag	false
CY2013Q1	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2013Q1	nwbi	Number Of Banking Locations NumberOfBankingLocations	166	branch
CY2013Q1	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2013Q1	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2013Q2	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	93735174	shares
CY2013Q1	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2013
CY2013Q1	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q1
CY2013Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	80134000	USD
CY2013Q1	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	13700000	USD
CY2013Q1	us-gaap	Noninterest Income NoninterestIncome	15877000	USD
CY2013Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6439000	USD
CY2013Q1	us-gaap	Assets Assets	7994490000	USD
CY2012Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	86249000	USD
CY2012Q1	us-gaap	Interest Expense InterestExpense	20843000	USD
CY2012Q1	us-gaap	Noninterest Income NoninterestIncome	13640000	USD
CY2013Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	15298000	USD
CY2012Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6302000	USD
CY2012Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	15181000	USD
CY2012Q1	us-gaap	Assets Assets	8069008000	USD
CY2013Q1	us-gaap	Noninterest Expense NoninterestExpense	51471000	USD
CY2012Q1	us-gaap	Noninterest Expense NoninterestExpense	51276000	USD
CY2013Q1	nwbi	Number Of Reportable Business Segments NumberOfReportableBusinessSegments	2	segment
CY2013Q1	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	1085155000	USD
CY2013Q1	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	31106000	USD
CY2013Q1	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	4157000	USD
CY2013Q1	us-gaap	Available For Sale Securities Fair Value Disclosure AvailableForSaleSecuritiesFairValueDisclosure	1112104000	USD
CY2012Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	1053122000	USD
CY2012Q4	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	30279000	USD
CY2012Q4	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	4327000	USD
CY2012Q4	us-gaap	Available For Sale Securities Fair Value Disclosure AvailableForSaleSecuritiesFairValueDisclosure	1079074000	USD
CY2013Q1	us-gaap	Held To Maturity Securities Amortized Cost Before Other Than Temporary Impairment HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment	143253000	USD
CY2013Q1	us-gaap	Heldtomaturity Securities Unrecognized Holding Gain HeldtomaturitySecuritiesUnrecognizedHoldingGain	5852000	USD
CY2013Q1	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	149105000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Amortized Cost Before Other Than Temporary Impairment HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment	155081000	USD
CY2012Q4	us-gaap	Heldtomaturity Securities Unrecognized Holding Gain HeldtomaturitySecuritiesUnrecognizedHoldingGain	6902000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Unrecognized Holding Loss HeldToMaturitySecuritiesUnrecognizedHoldingLoss	14000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	161969000	USD
CY2013Q1	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	308045000	USD
CY2013Q1	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	36479000	USD
CY2013Q1	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	344524000	USD
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	238873000	USD
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	37237000	USD
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	276110000	USD
CY2012Q4	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	9811000	USD
CY2011Q4	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	11633000	USD
CY2013Q1	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	9744000	USD
CY2012Q1	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	10560000	USD
CY2013Q1	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold	-67000	USD
CY2012Q1	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold	-1311000	USD
CY2012Q1	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	238000	USD
CY2013Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	348000	USD
CY2012Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	295000	USD
CY2011Q4	us-gaap	Goodwill Goodwill	171882000	USD
CY2012Q4	us-gaap	Goodwill Goodwill	174461000	USD
CY2012	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	2579000	USD
CY2013Q1	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	2000	USD
CY2013Q1	us-gaap	Goodwill Goodwill	174463000	USD
CY2013Q1	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	43600000	USD
CY2013Q1	nwbi	Guarantee Obligations Maximum Exposure Collateralized GuaranteeObligationsMaximumExposureCollateralized	42800000	USD
CY2013Q1	us-gaap	Other Deferred Credits Current OtherDeferredCreditsCurrent	834000	USD
CY2013Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	90403909	shares
CY2012Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	94115522	shares
CY2013Q1	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	474994	shares
CY2012Q1	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	549811	shares
CY2013Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	90878903	shares
CY2012Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	94665333	shares
CY2013Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.17
CY2012Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.16
CY2013Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.17
CY2012Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.16
CY2013Q1	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	2200000	USD
CY2012Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	5792509000	USD
CY2012Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	1624000	USD
CY2012Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	73219000	USD
CY2012Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	5629261000	USD
CY2013Q1	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	5703818000	USD
CY2013Q1	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	1174000	USD
CY2013Q1	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	72009000	USD
CY2013Q1	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	5538276000	USD
CY2013Q1	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	9123000	USD
CY2013Q1	us-gaap	Allowance For Loan And Lease Losses Recoveries Of Bad Debts AllowanceForLoanAndLeaseLossesRecoveriesOfBadDebts	-755000	USD
CY2011Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	71138000	USD
CY2012Q1	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	5344000	USD
CY2012Q1	us-gaap	Allowance For Loan And Lease Losses Recoveries Of Bad Debts AllowanceForLoanAndLeaseLossesRecoveriesOfBadDebts	-860000	USD
CY2012Q1	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	72941000	USD
CY2012Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	5702480000	USD
CY2012Q4	nwbi	Loans And Leases Receivable Allowance Excluding Unallocated LoansAndLeasesReceivableAllowanceExcludingUnallocated	69193000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	120212000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	1698000	USD
CY2012Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	89444000	USD
CY2013Q1	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	5610285000	USD
CY2013Q1	nwbi	Loans And Leases Receivable Allowance Excluding Unallocated LoansAndLeasesReceivableAllowanceExcludingUnallocated	67982000	USD
CY2013Q1	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	125742000	USD
CY2013Q1	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	781000	USD
CY2013Q1	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	91365000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment Equal To Greater Than90 Days Past Due FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue	68347000	USD
CY2012Q4	nwbi	Financing Receivable Recorded Investment Less Than90 Days Past Due FinancingReceivableRecordedInvestmentLessThan90DaysPastDue	51865000	USD
CY2012Q4	nwbi	Financing Receivable Recorded Accruing Loans Reviewed For Impairment FinancingReceivableRecordedAccruingLoansReviewedForImpairment	33282000	USD
CY2012Q4	nwbi	Financing Receivable Recorded Accruing Loans Not Reviewed For Impairment FinancingReceivableRecordedAccruingLoansNotReviewedForImpairment	30817000	USD
CY2012Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	184311000	USD
CY2012	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	190476000	USD
CY2012	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	6524000	USD
CY2013Q1	us-gaap	Financing Receivable Recorded Investment Equal To Greater Than90 Days Past Due FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue	72635000	USD
CY2013Q1	nwbi	Financing Receivable Recorded Investment Less Than90 Days Past Due FinancingReceivableRecordedInvestmentLessThan90DaysPastDue	53107000	USD
CY2013Q1	nwbi	Financing Receivable Recorded Accruing Loans Reviewed For Impairment FinancingReceivableRecordedAccruingLoansReviewedForImpairment	29114000	USD
CY2013Q1	nwbi	Financing Receivable Recorded Accruing Loans Not Reviewed For Impairment FinancingReceivableRecordedAccruingLoansNotReviewedForImpairment	22563000	USD
CY2013Q1	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	177419000	USD
CY2013Q1	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	177536000	USD
CY2013Q1	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	1436000	USD
CY2012Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	5577095000	USD
CY2012Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	125385000	USD
CY2012Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	16607000	USD
CY2013Q1	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	5492655000	USD
CY2013Q1	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	117630000	USD
CY2013Q1	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	16020000	USD
CY2013Q1	nwbi	Financing Receivable Modifications That Subsequently Defaulted Number Of Contracts FinancingReceivableModificationsThatSubsequentlyDefaultedNumberOfContracts	11	item
CY2013Q1	nwbi	Financing Receivable Modification That Subsequently Defaulted Pre Modification Recorded Investment FinancingReceivableModificationThatSubsequentlyDefaultedPreModificationRecordedInvestment	12788000	USD
CY2012Q1	nwbi	Financing Receivable Modifications That Subsequently Defaulted Number Of Contracts FinancingReceivableModificationsThatSubsequentlyDefaultedNumberOfContracts	2	item
CY2012Q1	nwbi	Financing Receivable Modification That Subsequently Defaulted Pre Modification Recorded Investment FinancingReceivableModificationThatSubsequentlyDefaultedPreModificationRecordedInvestment	881000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	5545040000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	157440000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment60 To89 Days Past Due FinancingReceivableRecordedInvestment60To89DaysPastDue	27948000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment30 To59 Days Past Due FinancingReceivableRecordedInvestment30To59DaysPastDue	61145000	USD
CY2013Q1	us-gaap	Financing Receivable Recorded Investment30 To59 Days Past Due FinancingReceivableRecordedInvestment30To59DaysPastDue	60445000	USD
CY2013Q1	us-gaap	Financing Receivable Recorded Investment60 To89 Days Past Due FinancingReceivableRecordedInvestment60To89DaysPastDue	14145000	USD
CY2013Q1	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	147225000	USD
CY2013Q1	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	5463060000	USD
CY2012Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	88277000	USD
CY2012Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	362794000	USD
CY2012Q4	nwbi	Federal Funds Sold And Other Short Term Investments FederalFundsSoldAndOtherShortTermInvestments	633000	USD
CY2012Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	1079074000	USD
CY2012Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	155081000	USD
CY2012Q4	nwbi	Cash Cash Equivalents And Marketable Securities CashCashEquivalentsAndMarketableSecurities	1685859000	USD
CY2012Q4	us-gaap	Loans Receivable Held For Sale Net LoansReceivableHeldForSaleNet	15441000	USD
CY2012Q4	us-gaap	Loans And Leases Receivable Consumer Mortgage LoansAndLeasesReceivableConsumerMortgage	2400208000	USD
CY2012Q4	us-gaap	Loans Receivable Commercial Real Estate LoansReceivableCommercialRealEstate	1585833000	USD
CY2012Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	46834000	USD
CY2012Q4	us-gaap	Interest Receivable InterestReceivable	23313000	USD
CY2013Q1	nwbi	Cash Cash Equivalents And Marketable Securities CashCashEquivalentsAndMarketableSecurities	1840547000	USD
CY2012Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	26165000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	138824000	USD
CY2012Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	137044000	USD
CY2012Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	3529000	USD
CY2012Q4	us-gaap	Other Assets OtherAssets	77310000	USD
CY2012Q4	us-gaap	Assets Assets	7942600000	USD
CY2012Q4	us-gaap	Noninterest Bearing Domestic Deposit Demand NoninterestBearingDomesticDepositDemand	755429000	USD
CY2012Q4	us-gaap	Interest Bearing Domestic Deposit Demand InterestBearingDomesticDepositDemand	851771000	USD
CY2012Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	2271311000	USD
CY2012Q4	us-gaap	Time Deposits TimeDeposits	1886089000	USD
CY2012Q4	us-gaap	Deposits Deposits	5764600000	USD
CY2012Q4	us-gaap	Borrowed Funds BorrowedFunds	860047000	USD
CY2012Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	103094000	USD
CY2012Q4	us-gaap	Advance Payments By Borrowers For Taxes And Insurance AdvancePaymentsByBorrowersForTaxesAndInsurance	23325000	USD
CY2012Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	888000	USD
CY2012Q4	us-gaap	Other Liabilities OtherLiabilities	62177000	USD
CY2012Q4	us-gaap	Liabilities Liabilities	6814131000	USD
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	937000	USD
CY2012Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	613249000	USD
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	550296000	USD
CY2012Q4	nwbi	Unallocated Common Stock Held By Esop UnallocatedCommonStockHeldByESOP	24525000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-11488000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	1128469000	USD
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	7942600000	USD
CY2013Q1	us-gaap	Deposits Deposits	5800151000	USD
CY2013Q1	us-gaap	Liabilities Liabilities	6846910000	USD
CY2013Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	7994490000	USD
CY2013Q1	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2012Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2013Q1	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
CY2012Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
CY2013Q1	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2012Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2013Q1	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2012Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2013Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2013Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	93802335	shares
CY2012Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	93652960	shares
CY2012Q1	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	78159000	USD
CY2012Q1	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	4691000	USD
CY2012Q1	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	573000	USD
CY2012Q1	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	2446000	USD
CY2012Q1	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	380000	USD
CY2012Q1	us-gaap	Interest Expense Deposits InterestExpenseDeposits	12944000	USD
CY2012Q1	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	7899000	USD
CY2012Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	65406000	USD
CY2012Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	59119000	USD
CY2012Q1	us-gaap	Impairment Of Investments ImpairmentOfInvestments	545000	USD
CY2012Q1	nwbi	Noncredit Related Losses On Securities Not Expected To Be Sold NoncreditRelatedLossesOnSecuritiesNotExpectedToBeSold	307000	USD
CY2012Q1	nwbi	Net Other Than Temporary Impairments NetOtherThanTemporaryImpairments	238000	USD
CY2012Q1	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	44000	USD
CY2012Q1	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	1718000	USD
CY2012Q1	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	8425000	USD
CY2012Q1	us-gaap	Fees And Commissions Fiduciary And Trust Activities FeesAndCommissionsFiduciaryAndTrustActivities	2116000	USD
CY2012Q1	us-gaap	Net Cash Provided By Used In Continuing Operations NetCashProvidedByUsedInContinuingOperations	70592000	USD
CY2013Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	585190000	USD
CY2012Q1	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-1070000	USD
CY2012Q1	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1117000	USD
CY2012Q1	nwbi	Mortgage Banking Income MortgageBankingIncome	531000	USD
CY2012Q1	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	997000	USD
CY2012Q1	us-gaap	Labor And Related Expense LaborAndRelatedExpense	27838000	USD
CY2012Q1	us-gaap	Occupancy Costs OccupancyCosts	5748000	USD
CY2012Q1	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	3324000	USD
CY2012Q1	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	6142000	USD
CY2012Q1	us-gaap	Marketing Expense MarketingExpense	2036000	USD
CY2012Q1	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	1620000	USD
CY2012Q1	us-gaap	Professional Fees ProfessionalFees	1697000	USD
CY2012Q1	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	740000	USD
CY2012Q1	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1836000	USD
CY2012Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	21483000	USD
CY2013Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	64489000	USD
CY2013Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	57331000	USD
CY2013Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	21737000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1361000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	1457000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	551000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	2439000	USD
CY2012Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	17620000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	604000	USD
CY2013Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	16811000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	436000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	870000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxPortionAttributableToParent	367000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxPortionAttributableToParent	297000	USD
CY2012Q1	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	-628000	USD
CY2012Q1	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	2467000	USD
CY2012Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-10432000	USD
CY2012Q1	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	2547000	USD
CY2012Q1	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	54000	USD
CY2012Q1	us-gaap	Unrealized Gain Loss On Securities UnrealizedGainLossOnSecurities	-238000	USD
CY2012Q1	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	536000	USD
CY2012Q1	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	50110000	USD
CY2012Q1	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	36982000	USD
CY2012Q1	us-gaap	Share Based Compensation ShareBasedCompensation	1023000	USD
CY2012Q1	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	26157000	USD
CY2012Q1	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	77491000	USD
CY2012Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	68558000	USD
CY2012Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	14401000	USD
CY2012Q1	nwbi	Originations Of Loans Receivable Held For Investment OriginationsOfLoansReceivableHeldForInvestment	480303000	USD
CY2012Q1	us-gaap	Proceeds From Principal Repayments On Loans And Leases Held For Investment ProceedsFromPrincipalRepaymentsOnLoansAndLeasesHeldForInvestment	427002000	USD
CY2012Q1	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-1845000	USD
CY2012Q1	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	3263000	USD
CY2012Q1	us-gaap	Payments To Acquire Real Estate Held For Investment PaymentsToAcquireRealEstateHeldForInvestment	-114000	USD
CY2012Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	4346000	USD
CY2012Q1	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-46957000	USD
CY2012Q1	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	89436000	USD
CY2012Q1	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	17000	USD
CY2012Q1	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	8502000	USD
CY2012Q1	nwbi	Increase Decrease In Advances By Borrowers For Taxes And Insurance IncreaseDecreaseInAdvancesByBorrowersForTaxesAndInsurance	4112000	USD
CY2012Q1	us-gaap	Payments Of Dividends PaymentsOfDividends	11427000	USD
CY2012Q1	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	91392000	USD
CY2013Q1	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1218000	USD
CY2012Q1	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	786000	USD
CY2012Q1	us-gaap	Cash And Due From Banks CashAndDueFromBanks	85050000	USD
CY2012Q1	nwbi	Cash Paid For Interest On Deposits And Borrowings CashPaidForInterestOnDepositsAndBorrowings	20828000	USD
CY2012Q1	us-gaap	Income Taxes Paid IncomeTaxesPaid	955000	USD
CY2012Q1	nwbi	Transfer Of Other Real Estate And Other Repossessed Personal Property TransferOfOtherRealEstateAndOtherRepossessedPersonalProperty	6557000	USD
CY2012Q1	nwbi	Sale And Financing Of Other Real Estate Owned SaleAndFinancingOfOtherRealEstateOwned	100000	USD
CY2013Q1	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	42229000	USD
CY2013Q1	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	50840000	USD
CY2013Q1	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	40417000	USD
CY2013Q1	us-gaap	Net Cash Provided By Used In Continuing Operations NetCashProvidedByUsedInContinuingOperations	133486000	USD
CY2012Q1	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	672887000	USD
CY2012Q1	nwbi	Federal Funds Sold And Other Short Term Investments FederalFundsSoldAndOtherShortTermInvestments	952000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	688297000	USD
CY2012Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	758889000	USD
CY2012Q1	nwbi	Cash Paid For Interest On Deposits CashPaidForInterestOnDeposits	11065000	USD
CY2013Q1	nwbi	Cash Paid For Interest On Deposits CashPaidForInterestOnDeposits	7031000	USD
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	1154904000	USD
CY2012Q1	us-gaap	Stockholders Equity StockholdersEquity	1162906000	USD
CY2013Q1	us-gaap	Stockholders Equity StockholdersEquity	1147580000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1513000	USD
CY2012Q1	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	786000	USD
CY2013Q1	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1218000	USD
CY2012Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1023000	USD
CY2013Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1082000	USD
CY2012Q1	us-gaap	Dividends Cash DividendsCash	11427000	USD
CY2012Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.12
CY2013Q1	us-gaap	Assets Fair Value Disclosure Nonrecurring AssetsFairValueDisclosureNonrecurring	105840000	USD
CY2012Q4	us-gaap	Assets Fair Value Disclosure Nonrecurring AssetsFairValueDisclosureNonrecurring	110658000	USD
CY2013Q1	nwbi	Number Of Business Trusts Owned NumberOfBusinessTrustsOwned	2	item
CY2012Q4	us-gaap	Preferred Stock Value PreferredStockValue		USD
CY2013Q1	us-gaap	Preferred Stock Value PreferredStockValue		USD
CY2013Q1	nwbi	Number Of Consumer Finance Offices NumberOfConsumerFinanceOffices	52	item
CY2013Q1	nwbi	Finite Lived Intangible Assets Amortization Expense Year Six FiniteLivedIntangibleAssetsAmortizationExpenseYearSix	173000	USD
CY2013Q1	nwbi	Loans And Leases Receivable Net Of Deferred Income Percentage LoansAndLeasesReceivableNetOfDeferredIncomePercentage	1.000	pure
CY2013Q1	nwbi	Financing Receivable Recorded Investment Equal To Greater Than90 Days Past Due Percentage FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDuePercentage	0.012	pure
CY2012Q4	nwbi	Loans And Leases Receivable Net Of Deferred Income Percentage LoansAndLeasesReceivableNetOfDeferredIncomePercentage	1.000	pure
CY2012Q4	nwbi	Financing Receivable Recorded Investment Equal To Greater Than90 Days Past Due Percentage FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDuePercentage	0.012	pure
CY2013Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2013Q1	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0	USD
CY2013Q1	nwbi	Number Of Investments With Cash Flow Disruption NumberOfInvestmentsWithCashFlowDisruption	0	item
CY2013Q1	nwbi	Financing Receivable Salvage And Recoveries Value FinancingReceivableSalvageAndRecoveriesValue	0	USD
CY2013Q1	nwbi	Significant Changes In Operations During Period SignificantChangesInOperationsDuringPeriod	0.000	pure
CY2013Q1	nwbi	Guarantee Obligations Recourse Provisions Amount GuaranteeObligationsRecourseProvisionsAmount	0	USD
CY2013Q1	nwbi	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Financial Instruments Total Unrealized Gains Losses Period Increase Decrease FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisFinancialInstrumentsTotalUnrealizedGainsLossesPeriodIncreaseDecrease	0	USD
CY2012	nwbi	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Financial Instruments Total Unrealized Gains Losses Period Increase Decrease FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisFinancialInstrumentsTotalUnrealizedGainsLossesPeriodIncreaseDecrease	0	USD
CY2013Q1	nwbi	Fair Value Assets Amount Transfers Between Level1 And Level2 FairValueAssetsAmountTransfersBetweenLevel1AndLevel2	0	USD
CY2013Q1	nwbi	Fair Value Liabilities Amount Transfers Between Level1 And Level2 FairValueLiabilitiesAmountTransfersBetweenLevel1AndLevel2	0	USD
CY2013Q1	us-gaap	Amount Of Ineffectiveness On Net Investment Hedges AmountOfIneffectivenessOnNetInvestmentHedges	0	USD
CY2013Q1	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses2	-2493000	USD
CY2012Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses2	-2940000	USD
CY2013Q1	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses2	-4157000	USD
CY2012Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses2	-4341000	USD
CY2013Q1	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses2	-1664000	USD
CY2012Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses2	-1401000	USD
CY2013Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear	1210000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	883000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	1461000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	-49000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	-43000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	-31000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Writedown Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForWritedownOfSecuritiesIncludedInNetIncomeNetOfTax	145000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Write Down Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForWriteDownOfSecuritiesIncludedInNetIncomeTax	0	USD
CY2012Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Write Down Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForWriteDownOfSecuritiesIncludedInNetIncomeTax	93000	USD
CY2013Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	814000	USD
CY2013Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	571000	USD
CY2013Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	415000	USD
CY2013Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	259000	USD
CY2013Q1	nwbi	Financing Receivable Ninety Days Past Due And Still Accruing FinancingReceivableNinetyDaysPastDueAndStillAccruing	P90D
CY2012	nwbi	Financing Receivable Ninety Days Past Due And Still Accruing FinancingReceivableNinetyDaysPastDueAndStillAccruing	P90D
CY2013Q1	nwbi	Period To Return Troubled Debt Restructured Loans Included In Non Performing Loans To Performing Status PeriodToReturnTroubledDebtRestructuredLoansIncludedInNonPerformingLoansToPerformingStatus	P6M
CY2012Q1	nwbi	Period To Return Troubled Debt Restructured Loans Included In Non Performing Loans To Performing Status PeriodToReturnTroubledDebtRestructuredLoansIncludedInNonPerformingLoansToPerformingStatus	P6M
CY2013Q1	us-gaap	Cash And Due From Banks CashAndDueFromBanks	71607000	USD
CY2013Q1	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	512949000	USD
CY2013Q1	nwbi	Federal Funds Sold And Other Short Term Investments FederalFundsSoldAndOtherShortTermInvestments	634000	USD
CY2013Q1	us-gaap	Available For Sale Securities AvailableForSaleSecurities	1112104000	USD
CY2013Q1	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	143253000	USD
CY2013Q1	us-gaap	Loans Receivable Held For Sale Net LoansReceivableHeldForSaleNet	3823000	USD
CY2013Q1	us-gaap	Loans And Leases Receivable Consumer Mortgage LoansAndLeasesReceivableConsumerMortgage	2370561000	USD
CY2013Q1	us-gaap	Loans Receivable Commercial Real Estate LoansReceivableCommercialRealEstate	1572948000	USD
CY2013Q1	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	47332000	USD
CY2013Q1	us-gaap	Interest Receivable InterestReceivable	23963000	USD
CY2013Q1	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	24035000	USD
CY2013Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	138950000	USD
CY2013Q1	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	138123000	USD
CY2013Q1	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	3181000	USD
CY2013Q1	us-gaap	Other Assets OtherAssets	65620000	USD
CY2013Q1	us-gaap	Noninterest Bearing Domestic Deposit Demand NoninterestBearingDomesticDepositDemand	787308000	USD
CY2013Q1	us-gaap	Interest Bearing Domestic Deposit Demand InterestBearingDomesticDepositDemand	864168000	USD
CY2013Q1	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	2327623000	USD
CY2013Q1	us-gaap	Time Deposits TimeDeposits	1821052000	USD
CY2013Q1	us-gaap	Borrowed Funds BorrowedFunds	859860000	USD
CY2013Q1	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	103094000	USD
CY2013Q1	us-gaap	Advance Payments By Borrowers For Taxes And Insurance AdvancePaymentsByBorrowersForTaxesAndInsurance	27160000	USD
CY2013Q1	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	1180000	USD
CY2013Q1	us-gaap	Other Liabilities OtherLiabilities	55465000	USD
CY2013Q1	us-gaap	Common Stock Value CommonStockValue	938000	USD
CY2013Q1	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	615160000	USD
CY2013Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	565594000	USD
CY2013Q1	nwbi	Unallocated Common Stock Held By Esop UnallocatedCommonStockHeldByESOP	24137000	USD
CY2013Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-9975000	USD
CY2013Q1	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	73474000	USD
CY2013Q1	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	3441000	USD
CY2013Q1	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	905000	USD
CY2013Q1	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	2063000	USD
CY2013Q1	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	251000	USD
CY2013Q1	us-gaap	Interest Expense Deposits InterestExpenseDeposits	7814000	USD
CY2013Q1	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	7831000	USD
CY2013Q1	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	101000	USD
CY2013Q1	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	8190000	USD
CY2013Q1	us-gaap	Fees And Commissions Fiduciary And Trust Activities FeesAndCommissionsFiduciaryAndTrustActivities	2204000	USD
CY2013Q1	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	2295000	USD
CY2013Q1	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-130000	USD
CY2013Q1	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1085000	USD
CY2013Q1	nwbi	Mortgage Banking Income MortgageBankingIncome	956000	USD
CY2013Q1	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	1176000	USD
CY2013Q1	us-gaap	Labor And Related Expense LaborAndRelatedExpense	27930000	USD
CY2013Q1	us-gaap	Occupancy Costs OccupancyCosts	6153000	USD
CY2013Q1	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	3268000	USD
CY2013Q1	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	5853000	USD
CY2013Q1	us-gaap	Professional Fees ProfessionalFees	1693000	USD
CY2013Q1	us-gaap	Other Noninterest Expense OtherNoninterestExpense	2289000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	670000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	-66000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	680000	USD
CY2013Q1	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	727000	USD
CY2013Q1	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	3056000	USD
CY2013Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-8754000	USD
CY2013Q1	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-5022000	USD
CY2013Q1	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-57000	USD
CY2013Q1	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	446000	USD
CY2013Q1	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	32883000	USD
CY2013Q1	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	45010000	USD
CY2013Q1	us-gaap	Share Based Compensation ShareBasedCompensation	1082000	USD
CY2013Q1	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	108326000	USD
CY2013Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	11856000	USD
CY2013Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	76309000	USD
CY2013Q1	nwbi	Originations Of Loans Receivable Held For Investment OriginationsOfLoansReceivableHeldForInvestment	407122000	USD
CY2013Q1	us-gaap	Proceeds From Principal Repayments On Loans And Leases Held For Investment ProceedsFromPrincipalRepaymentsOnLoansAndLeasesHeldForInvestment	477091000	USD
CY2013Q1	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	498000	USD
CY2013Q1	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	4700000	USD
CY2013Q1	us-gaap	Payments To Acquire Real Estate Held For Investment PaymentsToAcquireRealEstateHeldForInvestment	-114000	USD
CY2013Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3284000	USD
CY2013Q1	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	35551000	USD
CY2013Q1	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	17000	USD
CY2013Q1	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-20170000	USD
CY2013Q1	nwbi	Increase Decrease In Advances By Borrowers For Taxes And Insurance IncreaseDecreaseInAdvancesByBorrowersForTaxesAndInsurance	3835000	USD
CY2013Q1	nwbi	Cash Paid For Interest On Deposits And Borrowings CashPaidForInterestOnDepositsAndBorrowings	15353000	USD
CY2013Q1	us-gaap	Income Taxes Paid IncomeTaxesPaid	3587000	USD
CY2013Q1	nwbi	Transfer Of Other Real Estate And Other Repossessed Personal Property TransferOfOtherRealEstateAndOtherRepossessedPersonalProperty	2985000	USD
CY2013Q1	nwbi	Sale And Financing Of Other Real Estate Owned SaleAndFinancingOfOtherRealEstateOwned	269000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	451704000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-23226000	USD
CY2012Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-20787000	USD
CY2012Q1	nwbi	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	1912000	USD
CY2012Q1	nwbi	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-527000	USD
CY2013Q1	nwbi	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	1350000	USD
CY2013Q1	nwbi	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-163000	USD
CY2013Q1	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	20000000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Tax OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostTax	123000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Tax OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostTax	231000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Pension Cost Net Of Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax	-229000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Pension Cost Net Of Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax	-431000	USD
CY2012Q4	us-gaap	Loans And Leases Receivable Consumer Home Equity LoansAndLeasesReceivableConsumerHomeEquity	1076637000	USD
CY2013Q1	us-gaap	Loans And Leases Receivable Consumer Home Equity LoansAndLeasesReceivableConsumerHomeEquity	1052485000	USD
CY2012Q4	us-gaap	Loans And Leases Receivable Consumer Other LoansAndLeasesReceivableConsumerOther	235367000	USD
CY2013Q1	us-gaap	Loans And Leases Receivable Consumer Other LoansAndLeasesReceivableConsumerOther	218464000	USD
CY2012Q4	us-gaap	Loans And Leases Receivable Consumer LoansAndLeasesReceivableConsumer	3727653000	USD
CY2013Q1	us-gaap	Loans And Leases Receivable Consumer LoansAndLeasesReceivableConsumer	3645333000	USD
CY2012Q4	us-gaap	Loans Receivable Commercial And Industrial LoansReceivableCommercialAndIndustrial	388994000	USD
CY2013Q1	us-gaap	Loans Receivable Commercial And Industrial LoansReceivableCommercialAndIndustrial	392004000	USD
CY2012Q4	us-gaap	Loans And Leases Receivable Commercial LoansAndLeasesReceivableCommercial	1974827000	USD
CY2013Q1	us-gaap	Loans And Leases Receivable Commercial LoansAndLeasesReceivableCommercial	1964952000	USD
CY2013Q1	us-gaap	Financing Receivable Modifications Number Of Contracts1 FinancingReceivableModificationsNumberOfContracts1	58	item
CY2012Q1	us-gaap	Financing Receivable Modifications Number Of Contracts1 FinancingReceivableModificationsNumberOfContracts1	6	item
CY2013Q1	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment1 FinancingReceivableModificationsPreModificationRecordedInvestment1	5611000	USD
CY2012Q1	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment1 FinancingReceivableModificationsPreModificationRecordedInvestment1	3045000	USD
CY2013Q1	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment1 FinancingReceivableModificationsPostModificationRecordedInvestment1	4838000	USD
CY2012Q1	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment1 FinancingReceivableModificationsPostModificationRecordedInvestment1	2837000	USD
CY2013Q1	us-gaap	Receivables Change In Method Of Calculating Impairment Recorded Investment ReceivablesChangeInMethodOfCalculatingImpairmentRecordedInvestment	600000	USD
CY2012Q1	us-gaap	Receivables Change In Method Of Calculating Impairment Recorded Investment ReceivablesChangeInMethodOfCalculatingImpairmentRecordedInvestment	720000	USD
CY2013Q1	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment FinancingReceivableModificationsSubsequentDefaultRecordedInvestment	17472000	USD
CY2012Q1	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment FinancingReceivableModificationsSubsequentDefaultRecordedInvestment	1024000	USD
CY2013Q1	us-gaap	Allowance For Credit Losses Change In Method Of Calculating Impairment AllowanceForCreditLossesChangeInMethodOfCalculatingImpairment	2348000	USD
CY2013Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	7158000	USD
CY2012Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	6287000	USD

Files In Submission

Name	View Source	Status
0001104659-13-039924-index-headers.html	Edgar Link	pending
0001104659-13-039924-index.html	Edgar Link	pending
0001104659-13-039924.txt	Edgar Link	pending
0001104659-13-039924-xbrl.zip	Edgar Link	pending
a13-8378_110q.htm	Edgar Link	pending
a13-8378_1ex31d1.htm	Edgar Link	pending
a13-8378_1ex31d2.htm	Edgar Link	pending
a13-8378_1ex32d1.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	Edgar Link	pending
nwbi-20130331.xml	Edgar Link	completed
nwbi-20130331.xsd	Edgar Link	pending
nwbi-20130331_cal.xml	Edgar Link	unprocessable
nwbi-20130331_def.xml	Edgar Link	unprocessable
nwbi-20130331_lab.xml	Edgar Link	unprocessable
nwbi-20130331_pre.xml	Edgar Link	unprocessable
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report.css	Edgar Link	pending
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$NWBI
Northwest Bancshares, Inc. Stock $nwbi

2013 Q1 Form 10-Q Financial Statement

#000110465913039924 Filed on May 10, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NWBI Northwest Bancshares, Inc. Stock $nwbi

2013 Q1 Form 10-Q Financial Statement

#000110465913039924 Filed on May 10, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NWBI
Northwest Bancshares, Inc. Stock $nwbi