$NWBI
Northwest Bancshares, Inc. Stock $nwbi

$nwbi Overview Financials Valuation SEC Filings Company Website

2013 Q2 Form 10-Q Financial Statement

#000110465913062031 Filed on August 09, 2013

Income Statement

Concept	2013 Q2	2012 Q2	2012 Q1
Revenue	$78.72M	$84.81M	$86.03M
YoY Change	-7.18%	-5.77%	-5.36%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin	$5.959M	$7.169M	$5.360M
YoY Change	-16.88%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$1.600M	$1.200M	$2.500M
YoY Change	33.33%	140.0%	-39.02%
% of Gross Profit
Operating Expenses	$5.959M	$7.169M	$5.360M
YoY Change	-16.88%
Operating Profit
YoY Change
Interest Expense	$15.44M	$19.10M	$20.84M
YoY Change	-19.17%	-18.61%	-13.34%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$18.46M	$23.87M	$21.48M
YoY Change	-22.68%	13.21%	-13.18%
Income Tax	$5.020M	$7.508M	$6.302M
% Of Pretax Income	27.2%	31.46%	29.33%
Net Earnings	$13.30M	$16.30M	$15.20M
YoY Change	-18.4%	8.67%	-12.14%
Net Earnings / Revenue	16.89%	19.22%	17.67%
Basic Earnings Per Share	$0.15	$0.17	$0.16
Diluted Earnings Per Share	$0.15	$0.17	$0.16
COMMON SHARES
Basic Shares Outstanding	90.42M shares	94.29M shares	94.12M shares
Diluted Shares Outstanding	90.92M shares	94.50M shares	94.67M shares

Balance Sheet

Concept	2013 Q2	2012 Q2	2012 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$448.2M	$721.9M	$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	$140.6M	$135.0M	$134.0M
YoY Change	4.13%	7.15%	5.51%
Goodwill	$174.5M	$171.9M
YoY Change	1.5%
Intangibles	$2.832M	$1.549M
YoY Change	82.83%
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	$7.964B	$8.038B	$8.069B
YoY Change	-0.92%	-0.61%	-0.65%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$1.000M	$1.000M	$1.000M
YoY Change	0.0%	0.0%	0.0%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$857.0M	$853.0M	$836.0M
YoY Change	0.47%	0.71%	0.48%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$1.000M	$1.000M	$1.000M
YoY Change	0.0%	0.0%	0.0%
LONG-TERM LIABILITIES
Long-Term Debt	$103.0M	$103.0M	$103.0M
YoY Change	0.0%	0.0%	0.0%
Other Long-Term Liabilities	$58.00M	$73.00M	$68.00M
YoY Change	-20.55%	23.73%	28.3%
Total Long-Term Liabilities	$161.0M	$176.0M	$171.0M
YoY Change	-8.52%	8.64%	9.62%
TOTAL LIABILITIES
Total Short-Term Liabilities	$1.000M	$1.000M	$1.000M
Total Long-Term Liabilities	$161.0M	$176.0M	$171.0M
Total Liabilities	$6.836B	$6.869B	$6.907B
YoY Change	-0.48%	0.13%	1.05%
SHAREHOLDERS EQUITY
Retained Earnings	$557.1M	$552.3M
YoY Change	0.87%
Common Stock	$614.5M	$663.2M
YoY Change	-7.34%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.127B	$1.170B	$1.163B
YoY Change
Total Liabilities & Shareholders Equity	$7.964B	$8.038B	$8.069B
YoY Change	-0.92%	-0.61%	-0.65%

Cashflow Statement

Concept	2013 Q2	2012 Q2	2012 Q1
OPERATING ACTIVITIES
Net Income	$13.30M	$16.30M	$15.20M
YoY Change	-18.4%	8.67%	-12.14%
Depreciation, Depletion And Amortization	$1.600M	$1.200M	$2.500M
YoY Change	33.33%	140.0%	-39.02%
Cash From Operating Activities	$35.80M	$35.00M	$26.20M
YoY Change	2.29%	11.82%	-38.06%
INVESTING ACTIVITIES
Capital Expenditures	-$4.600M	-$4.300M	$4.346M
YoY Change	6.98%	-4400.0%	-328.74%
Acquisitions
YoY Change
Other Investing Activities	-$129.9M	-$14.10M	-$42.60M
YoY Change	821.28%	-41.0%	-182.24%
Cash From Investing Activities	-$134.5M	-$18.20M	-$47.00M
YoY Change	639.01%	-23.53%	-194.19%
FINANCING ACTIVITIES
Cash Dividend Paid			$11.43M
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net			$17.00K
YoY Change
Cash From Financing Activities	-38.20M	-53.80M	91.40M
YoY Change	-29.0%	-15.67%	-319.71%
NET CHANGE
Cash From Operating Activities	35.80M	35.00M	26.20M
Cash From Investing Activities	-134.5M	-18.20M	-47.00M
Cash From Financing Activities	-38.20M	-53.80M	91.40M
Net Change In Cash	-136.9M	-37.00M	70.60M
YoY Change	270.0%	-34.28%	39.53%
FREE CASH FLOW
Cash From Operating Activities	$35.80M	$35.00M	$26.20M
Capital Expenditures	-$4.600M	-$4.300M	$4.346M
Free Cash Flow	$40.40M	$39.30M	$21.85M
YoY Change	2.8%	25.96%	-50.56%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2013Q2	nwbi	Number Of Banking Locations NumberOfBankingLocations	166	branch
CY2013Q2	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	16200000	USD
CY2013Q2	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0	USD
	nwbi	Number Of Reportable Business Segments NumberOfReportableBusinessSegments	2	segment
CY2013Q2	nwbi	Number Of Consumer Finance Offices NumberOfConsumerFinanceOffices	52	item
CY2013Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	78763000	USD
CY2013Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	5405000	USD
CY2013Q2	us-gaap	Noninterest Income NoninterestIncome	13413000	USD
CY2013Q2	us-gaap	Noninterest Expense NoninterestExpense	52806000	USD
CY2013Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5051000	USD
CY2013Q2	us-gaap	Assets Assets	7963814000	USD
CY2012Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	84808000	USD
CY2012Q2	us-gaap	Interest Expense InterestExpense	19096000	USD
CY2012Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	4963000	USD
CY2012Q2	us-gaap	Noninterest Income NoninterestIncome	15086000	USD
CY2012Q2	us-gaap	Noninterest Expense NoninterestExpense	51966000	USD
CY2013Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	57922000	USD
CY2012Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7508000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13810000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	31542000	USD
CY2012Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	16361000	USD
CY2012Q2	us-gaap	Assets Assets	8037996000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	158396000	USD
	us-gaap	Interest Expense InterestExpense	31081000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	12563000	USD
	us-gaap	Noninterest Income NoninterestIncome	29791000	USD
	us-gaap	Noninterest Expense NoninterestExpense	104277000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11490000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	28776000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	170842000	USD
	us-gaap	Interest Expense InterestExpense	39939000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	11250000	USD
	us-gaap	Noninterest Income NoninterestIncome	28941000	USD
	us-gaap	Noninterest Expense NoninterestExpense	103242000	USD
CY2013Q2	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	1136792000	USD
CY2013Q2	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	26808000	USD
CY2013Q2	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	18647000	USD
CY2013Q2	us-gaap	Available For Sale Securities Fair Value Disclosure AvailableForSaleSecuritiesFairValueDisclosure	1144953000	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
CY2013Q2	us-gaap	Held To Maturity Securities Amortized Cost Before Other Than Temporary Impairment HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment	133439000	USD
CY2013Q2	us-gaap	Heldtomaturity Securities Unrecognized Holding Gain HeldtomaturitySecuritiesUnrecognizedHoldingGain	4294000	USD
CY2013Q2	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	137733000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Amortized Cost Before Other Than Temporary Impairment HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment	155081000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Unrecognized Holding Loss HeldToMaturitySecuritiesUnrecognizedHoldingLoss	14000	USD
CY2013Q2	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	614178000	USD
CY2013Q2	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses2	-16209000	USD
CY2013Q2	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	39061000	USD
CY2013Q2	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses2	-2438000	USD
CY2013Q2	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	653239000	USD
CY2013Q2	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses2	-18647000	USD
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	238873000	USD
CY2012Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses2	-1401000	USD
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	37237000	USD
CY2012Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses2	-2940000	USD
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	276110000	USD
CY2012Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses2	-4341000	USD
	nwbi	Number Of Investments With Cash Flow Disruption NumberOfInvestmentsWithCashFlowDisruption	0	item
CY2013Q2	nwbi	Increase Decrease In Financing Receivable Modifications Recorded Investment Reserve IncreaseDecreaseInFinancingReceivableModificationsRecordedInvestmentReserve	254000	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
CY2013Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold	-47000	USD
CY2012Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold	-664000	USD
CY2013Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	9697000	USD
CY2012Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	9896000	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
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold	-114000	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold	-1975000	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	238000	USD
CY2013Q2	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	5805158000	USD
CY2013Q2	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	-493000	USD
CY2013Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	72590000	USD
CY2013Q2	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	5618817000	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
CY2013Q2	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	6100000	USD
CY2013Q2	us-gaap	Allowance For Loan And Lease Losses Recoveries Of Bad Debts AllowanceForLoanAndLeaseLossesRecoveriesOfBadDebts	-1276000	USD
CY2013Q1	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	72009000	USD
CY2012Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	70110000	USD
CY2012Q2	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	8990000	USD
CY2012Q2	us-gaap	Allowance For Loan And Lease Losses Recoveries Of Bad Debts AllowanceForLoanAndLeaseLossesRecoveriesOfBadDebts	-1196000	USD
	us-gaap	Allowance For Loan And Lease Losses Recoveries Of Bad Debts AllowanceForLoanAndLeaseLossesRecoveriesOfBadDebts	-2031000	USD
CY2012Q1	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	72941000	USD
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	14334000	USD
	us-gaap	Allowance For Loan And Lease Losses Recoveries Of Bad Debts AllowanceForLoanAndLeaseLossesRecoveriesOfBadDebts	-2056000	USD
CY2011Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	71138000	USD
CY2013Q2	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	5691407000	USD
CY2013Q2	nwbi	Loans And Leases Receivable Allowance Excluding Unallocated LoansAndLeasesReceivableAllowanceExcludingUnallocated	68376000	USD
CY2013Q2	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	120566000	USD
CY2013Q2	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	86517000	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
CY2013Q2	nwbi	Loans And Leases Receivable Net Of Deferred Income Percentage LoansAndLeasesReceivableNetOfDeferredIncomePercentage	1.000	pure
CY2013Q2	us-gaap	Financing Receivable Recorded Investment Equal To Greater Than90 Days Past Due FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue	63510000	USD
CY2013Q2	nwbi	Financing Receivable Recorded Investment Equal To Greater Than90 Days Past Due Percentage FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDuePercentage	0.011	pure
CY2012Q4	nwbi	Loans And Leases Receivable Net Of Deferred Income Percentage LoansAndLeasesReceivableNetOfDeferredIncomePercentage	1.000	pure
CY2012Q4	us-gaap	Financing Receivable Recorded Investment Equal To Greater Than90 Days Past Due FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue	68347000	USD
CY2012Q4	nwbi	Financing Receivable Recorded Investment Equal To Greater Than90 Days Past Due Percentage FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDuePercentage	0.012	pure
CY2013Q2	nwbi	Financing Receivable Recorded Investment Less Than90 Days Past Due FinancingReceivableRecordedInvestmentLessThan90DaysPastDue	57056000	USD
CY2013Q2	nwbi	Financing Receivable Recorded Accruing Loans Reviewed For Impairment FinancingReceivableRecordedAccruingLoansReviewedForImpairment	39773000	USD
CY2013Q2	nwbi	Financing Receivable Recorded Accruing Loans Not Reviewed For Impairment FinancingReceivableRecordedAccruingLoansNotReviewedForImpairment	22811000	USD
CY2013Q2	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	183150000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	173898000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	2941000	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
CY2013Q2	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	5572487000	USD
CY2013Q2	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	118920000	USD
CY2013Q2	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	15139000	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
	nwbi	Financing Receivable Modifications Amount Paid Off FinancingReceivableModificationsAmountPaidOff	-2985000	USD
	nwbi	Financing Receivable Modifications Amount Paid Off FinancingReceivableModificationsAmountPaidOff	-846000	USD
	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	-1351000	USD
	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	-554000	USD
	nwbi	Financing Receivable Modifications That Subsequently Defaulted Number Of Contracts FinancingReceivableModificationsThatSubsequentlyDefaultedNumberOfContracts	13	item
	nwbi	Financing Receivable Modification That Subsequently Defaulted Pre Modification Recorded Investment FinancingReceivableModificationThatSubsequentlyDefaultedPreModificationRecordedInvestment	5591000	USD
	nwbi	Period To Return Troubled Debt Restructured Loans Included In Non Performing Loans To Performing Status PeriodToReturnTroubledDebtRestructuredLoansIncludedInNonPerformingLoansToPerformingStatus	P6M
CY2013Q2	nwbi	Financing Receivable Modifications That Subsequently Defaulted Number Of Contracts FinancingReceivableModificationsThatSubsequentlyDefaultedNumberOfContracts	5	item
CY2013Q2	nwbi	Financing Receivable Modification That Subsequently Defaulted Pre Modification Recorded Investment FinancingReceivableModificationThatSubsequentlyDefaultedPreModificationRecordedInvestment	2962000	USD
	nwbi	Period To Return Troubled Debt Restructured Loans Included In Non Performing Loans To Performing Status PeriodToReturnTroubledDebtRestructuredLoansIncludedInNonPerformingLoansToPerformingStatus	P6M
CY2012Q2	nwbi	Financing Receivable Modifications That Subsequently Defaulted Number Of Contracts FinancingReceivableModificationsThatSubsequentlyDefaultedNumberOfContracts	2	item
CY2012Q2	nwbi	Financing Receivable Modification That Subsequently Defaulted Pre Modification Recorded Investment FinancingReceivableModificationThatSubsequentlyDefaultedPreModificationRecordedInvestment	576000	USD
	nwbi	Financing Receivable Modifications That Subsequently Defaulted Number Of Contracts FinancingReceivableModificationsThatSubsequentlyDefaultedNumberOfContracts	4	item
	nwbi	Financing Receivable Modification That Subsequently Defaulted Pre Modification Recorded Investment FinancingReceivableModificationThatSubsequentlyDefaultedPreModificationRecordedInvestment	1452000	USD
CY2013Q2	us-gaap	Financing Receivable Recorded Investment30 To59 Days Past Due FinancingReceivableRecordedInvestment30To59DaysPastDue	22002000	USD
CY2013Q2	us-gaap	Financing Receivable Recorded Investment60 To89 Days Past Due FinancingReceivableRecordedInvestment60To89DaysPastDue	16906000	USD
CY2013Q2	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	102418000	USD
CY2013Q2	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	5588989000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment30 To59 Days Past Due FinancingReceivableRecordedInvestment30To59DaysPastDue	61145000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment60 To89 Days Past Due FinancingReceivableRecordedInvestment60To89DaysPastDue	27948000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	157440000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	5545040000	USD
CY2012Q2	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	279000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	574000	USD
CY2013Q2	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	349000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	697000	USD
CY2013Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear	1210000	USD
CY2013Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	814000	USD
CY2013Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	571000	USD
CY2013Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	415000	USD
CY2013Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	259000	USD
	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	2000	USD
CY2013Q2	us-gaap	Goodwill Goodwill	174463000	USD
CY2012	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	2579000	USD
CY2012Q4	us-gaap	Goodwill Goodwill	174461000	USD
CY2011Q4	us-gaap	Goodwill Goodwill	171882000	USD
CY2013Q2	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	43500000	USD
CY2013Q2	nwbi	Guarantee Obligations Maximum Exposure Collateralized GuaranteeObligationsMaximumExposureCollateralized	42900000	USD
CY2013Q2	us-gaap	Other Deferred Credits Current OtherDeferredCreditsCurrent	868000	USD
	nwbi	Guarantee Obligations Recourse Provisions Amount GuaranteeObligationsRecourseProvisionsAmount	0	USD
CY2012Q2	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Exercise Price1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	12.28
CY2013Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	15298000	USD
CY2012Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	15181000	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
	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
CY2013Q2	nwbi	Fair Value Assets Amount Transfers Between Level1 And Level2 FairValueAssetsAmountTransfersBetweenLevel1AndLevel2	0	USD
CY2013Q2	nwbi	Fair Value Liabilities Amount Transfers Between Level1 And Level2 FairValueLiabilitiesAmountTransfersBetweenLevel1AndLevel2	0	USD
CY2013Q2	us-gaap	Assets Fair Value Disclosure Nonrecurring AssetsFairValueDisclosureNonrecurring	102736000	USD
CY2012Q4	us-gaap	Assets Fair Value Disclosure Nonrecurring AssetsFairValueDisclosureNonrecurring	110658000	USD
CY2013Q2	nwbi	Number Of Business Trusts Owned NumberOfBusinessTrustsOwned	2	item
CY2013Q2	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	2200000	USD
CY2013Q2	nwbi	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-9773000	USD
CY2013Q2	nwbi	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-161000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-9612000	USD
CY2013Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-19587000	USD
CY2013Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-9975000	USD
CY2012Q2	nwbi	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	253000	USD
CY2012Q2	nwbi	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-290000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	543000	USD
CY2012Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-20787000	USD
CY2012Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-20244000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Tax OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostTax	-123000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Tax OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostTax	-232000	USD
	nwbi	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-8423000	USD
	nwbi	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-324000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-8099000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-11488000	USD
	nwbi	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	2165000	USD
	nwbi	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-817000	USD
CY2013Q2	us-gaap	Loans And Leases Receivable Consumer LoansAndLeasesReceivableConsumer	3702873000	USD
CY2012Q4	us-gaap	Loans And Leases Receivable Consumer LoansAndLeasesReceivableConsumer	3727653000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	2982000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-23226000	USD
	us-gaap	Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Tax OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostTax	-246000	USD
	us-gaap	Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Tax OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostTax	-463000	USD
	us-gaap	Amount Of Ineffectiveness On Net Investment Hedges AmountOfIneffectivenessOnNetInvestmentHedges	0	USD
CY2012Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	88277000	USD
CY2013Q2	us-gaap	Cash And Due From Banks CashAndDueFromBanks	87524000	USD
CY2013Q2	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	359997000	USD
CY2012Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	362794000	USD
CY2013Q2	nwbi	Federal Funds Sold And Other Short Term Investments FederalFundsSoldAndOtherShortTermInvestments	634000	USD
CY2012Q4	nwbi	Federal Funds Sold And Other Short Term Investments FederalFundsSoldAndOtherShortTermInvestments	633000	USD
CY2013Q2	us-gaap	Available For Sale Securities AvailableForSaleSecurities	1144953000	USD
CY2012Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	1079074000	USD
CY2013Q2	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	133439000	USD
CY2012Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	155081000	USD
CY2013Q2	nwbi	Cash Cash Equivalents And Marketable Securities CashCashEquivalentsAndMarketableSecurities	1726547000	USD
CY2012Q4	nwbi	Cash Cash Equivalents And Marketable Securities CashCashEquivalentsAndMarketableSecurities	1685859000	USD
CY2013Q2	us-gaap	Loans Receivable Held For Sale Net LoansReceivableHeldForSaleNet	296000	USD
CY2012Q4	us-gaap	Loans Receivable Held For Sale Net LoansReceivableHeldForSaleNet	15441000	USD
CY2013Q2	us-gaap	Loans And Leases Receivable Consumer Mortgage LoansAndLeasesReceivableConsumerMortgage	2414347000	USD
CY2012Q4	us-gaap	Loans And Leases Receivable Consumer Mortgage LoansAndLeasesReceivableConsumerMortgage	2400208000	USD
CY2013Q2	us-gaap	Loans And Leases Receivable Consumer Home Equity LoansAndLeasesReceivableConsumerHomeEquity	1064716000	USD
CY2012Q4	us-gaap	Loans And Leases Receivable Consumer Home Equity LoansAndLeasesReceivableConsumerHomeEquity	1076637000	USD
CY2013Q2	us-gaap	Loans And Leases Receivable Consumer Other LoansAndLeasesReceivableConsumerOther	223514000	USD
CY2012Q4	us-gaap	Loans And Leases Receivable Consumer Other LoansAndLeasesReceivableConsumerOther	235367000	USD
CY2013Q2	us-gaap	Loans Receivable Commercial Real Estate LoansReceivableCommercialRealEstate	1591226000	USD
CY2012Q4	us-gaap	Loans Receivable Commercial Real Estate LoansReceivableCommercialRealEstate	1585833000	USD
CY2013Q2	us-gaap	Loans Receivable Commercial And Industrial LoansReceivableCommercialAndIndustrial	397308000	USD
CY2012Q4	us-gaap	Loans Receivable Commercial And Industrial LoansReceivableCommercialAndIndustrial	388994000	USD
CY2013Q2	us-gaap	Loans And Leases Receivable Commercial LoansAndLeasesReceivableCommercial	1988534000	USD
CY2012Q4	us-gaap	Loans And Leases Receivable Commercial LoansAndLeasesReceivableCommercial	1974827000	USD
CY2013Q2	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	48240000	USD
CY2012Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	46834000	USD
CY2013Q2	us-gaap	Interest Receivable InterestReceivable	23171000	USD
CY2012Q4	us-gaap	Interest Receivable InterestReceivable	23313000	USD
CY2013Q2	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	21269000	USD
CY2012Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	26165000	USD
CY2013Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	140573000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	138824000	USD
CY2013Q2	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	139210000	USD
CY2012Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	137044000	USD
CY2013Q2	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	2832000	USD
CY2012Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	3529000	USD
CY2013Q2	us-gaap	Other Assets OtherAssets	68692000	USD
CY2012Q4	us-gaap	Other Assets OtherAssets	77310000	USD
CY2012Q4	us-gaap	Assets Assets	7942600000	USD
CY2013Q2	us-gaap	Noninterest Bearing Domestic Deposit Demand NoninterestBearingDomesticDepositDemand	796137000	USD
CY2012Q4	us-gaap	Noninterest Bearing Domestic Deposit Demand NoninterestBearingDomesticDepositDemand	755429000	USD
CY2013Q2	us-gaap	Interest Bearing Domestic Deposit Demand InterestBearingDomesticDepositDemand	887426000	USD
CY2012Q4	us-gaap	Interest Bearing Domestic Deposit Demand InterestBearingDomesticDepositDemand	851771000	USD
CY2013Q2	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	2337183000	USD
CY2012Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	2271311000	USD
CY2013Q2	us-gaap	Time Deposits TimeDeposits	1762346000	USD
CY2012Q4	us-gaap	Time Deposits TimeDeposits	1886089000	USD
CY2013Q2	us-gaap	Deposits Deposits	5783092000	USD
CY2012Q4	us-gaap	Deposits Deposits	5764600000	USD
CY2013Q2	us-gaap	Borrowed Funds BorrowedFunds	857344000	USD
CY2012Q4	us-gaap	Borrowed Funds BorrowedFunds	860047000	USD
CY2013Q2	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	103094000	USD
CY2012Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	103094000	USD
CY2013Q2	us-gaap	Advance Payments By Borrowers For Taxes And Insurance AdvancePaymentsByBorrowersForTaxesAndInsurance	33260000	USD
CY2012Q4	us-gaap	Advance Payments By Borrowers For Taxes And Insurance AdvancePaymentsByBorrowersForTaxesAndInsurance	23325000	USD
CY2013Q2	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	1043000	USD
CY2012Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	888000	USD
CY2013Q2	us-gaap	Other Liabilities OtherLiabilities	57748000	USD
CY2012Q4	us-gaap	Other Liabilities OtherLiabilities	62177000	USD
CY2013Q2	us-gaap	Liabilities Liabilities	6835581000	USD
CY2012Q4	us-gaap	Liabilities Liabilities	6814131000	USD
CY2013Q2	us-gaap	Common Stock Value CommonStockValue	939000	USD
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	937000	USD
CY2013Q2	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	613520000	USD
CY2012Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	613249000	USD
CY2013Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	557104000	USD
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	550296000	USD
CY2013Q2	nwbi	Unallocated Common Stock Held By Esop UnallocatedCommonStockHeldByESOP	23743000	USD
CY2012Q4	nwbi	Unallocated Common Stock Held By Esop UnallocatedCommonStockHeldByESOP	24525000	USD
CY2013Q2	us-gaap	Stockholders Equity StockholdersEquity	1128233000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	1128469000	USD
CY2013Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	7963814000	USD
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	7942600000	USD
CY2012Q4	us-gaap	Preferred Stock Value PreferredStockValue		USD
CY2013Q2	us-gaap	Preferred Stock Value PreferredStockValue		USD
CY2013Q2	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
CY2013Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
CY2012Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
CY2013Q2	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2012Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2013Q2	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
CY2013Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2013Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	93877847	shares
CY2013Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	93877847	shares
CY2012Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	93652960	shares
CY2012Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	93652960	shares
CY2013Q2	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	71987000	USD
CY2012Q2	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	77173000	USD
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	144960000	USD
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	155117000	USD
CY2013Q2	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	3308000	USD
CY2012Q2	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	4409000	USD
	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	6749000	USD
	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	9100000	USD
CY2013Q2	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	1034000	USD
CY2012Q2	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	435000	USD
	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	1939000	USD
	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	1008000	USD
CY2013Q2	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	2094000	USD
CY2012Q2	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	2318000	USD
	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	4157000	USD
	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	4764000	USD
CY2013Q2	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	340000	USD
CY2012Q2	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	473000	USD
	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	591000	USD
	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	853000	USD
CY2013Q2	us-gaap	Interest Expense Deposits InterestExpenseDeposits	7404000	USD
CY2012Q2	us-gaap	Interest Expense Deposits InterestExpenseDeposits	11184000	USD
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	15218000	USD
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	24128000	USD
CY2013Q2	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	8032000	USD
CY2012Q2	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	7912000	USD
	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	15863000	USD
	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	15811000	USD
CY2013Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	63327000	USD
CY2012Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	65712000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	127315000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	130903000	USD
CY2012Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	60749000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	114752000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	119653000	USD
	us-gaap	Impairment Of Investments ImpairmentOfInvestments	545000	USD
	nwbi	Net Other Than Temporary Impairments NetOtherThanTemporaryImpairments	238000	USD
	nwbi	Noncredit Related Losses On Securities Not Expected To Be Sold NoncreditRelatedLossesOnSecuritiesNotExpectedToBeSold	307000	USD
CY2013Q2	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	19000	USD
CY2012Q2	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	-44000	USD
CY2013Q2	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	9037000	USD
CY2012Q2	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	8951000	USD
	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	17728000	USD
	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	17591000	USD
CY2013Q2	us-gaap	Fees And Commissions Fiduciary And Trust Activities FeesAndCommissionsFiduciaryAndTrustActivities	2263000	USD
CY2012Q2	us-gaap	Fees And Commissions Fiduciary And Trust Activities FeesAndCommissionsFiduciaryAndTrustActivities	2018000	USD
	us-gaap	Fees And Commissions Fiduciary And Trust Activities FeesAndCommissionsFiduciaryAndTrustActivities	4467000	USD
	us-gaap	Fees And Commissions Fiduciary And Trust Activities FeesAndCommissionsFiduciaryAndTrustActivities	4134000	USD
CY2013Q2	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	2190000	USD
CY2012Q2	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	1603000	USD
	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	4485000	USD
	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	3321000	USD
CY2013Q2	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-2285000	USD
CY2012Q2	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-582000	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-2415000	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-1652000	USD
CY2013Q2	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1088000	USD
CY2012Q2	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1107000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	2173000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	2224000	USD
CY2013Q2	nwbi	Mortgage Banking Income MortgageBankingIncome	236000	USD
CY2012Q2	nwbi	Mortgage Banking Income MortgageBankingIncome	789000	USD
	nwbi	Mortgage Banking Income MortgageBankingIncome	1192000	USD
	nwbi	Mortgage Banking Income MortgageBankingIncome	1320000	USD
CY2013Q2	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	865000	USD
CY2012Q2	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	1244000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	2041000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	2241000	USD
CY2013Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	28156000	USD
CY2012Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	27416000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	56086000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	55254000	USD
CY2013Q2	us-gaap	Occupancy Costs OccupancyCosts	5744000	USD
CY2012Q2	us-gaap	Occupancy Costs OccupancyCosts	5483000	USD
	us-gaap	Occupancy Costs OccupancyCosts	11897000	USD
	us-gaap	Occupancy Costs OccupancyCosts	11231000	USD
CY2013Q2	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	3866000	USD
CY2012Q2	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	3340000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	7134000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	6664000	USD
CY2013Q2	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	7390000	USD
CY2012Q2	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	6059000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	13243000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	12201000	USD
CY2013Q2	us-gaap	Marketing Expense MarketingExpense	2093000	USD
CY2012Q2	us-gaap	Marketing Expense MarketingExpense	3829000	USD
	us-gaap	Marketing Expense MarketingExpense	3993000	USD
	us-gaap	Marketing Expense MarketingExpense	5865000	USD
CY2013Q2	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	1424000	USD
CY2012Q2	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	1418000	USD
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	2862000	USD
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	3038000	USD
CY2013Q2	us-gaap	Professional Fees ProfessionalFees	1199000	USD
CY2012Q2	us-gaap	Professional Fees ProfessionalFees	1500000	USD
	us-gaap	Professional Fees ProfessionalFees	2892000	USD
	us-gaap	Professional Fees ProfessionalFees	3197000	USD
CY2013Q2	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	600000	USD
CY2012Q2	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	571000	USD
	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	1199000	USD
	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	1311000	USD
CY2013Q2	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1985000	USD
CY2012Q2	us-gaap	Other Noninterest Expense OtherNoninterestExpense	2071000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	4274000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	3907000	USD
CY2013Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	18529000	USD
CY2012Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	23869000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	40266000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	45352000	USD
CY2013Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.15
CY2012Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.17
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.32
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.33
CY2013Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.15
CY2012Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.17
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.32
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.33
CY2013Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-11399000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	894000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-10729000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	451704000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	2255000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Writedown Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForWritedownOfSecuritiesIncludedInNetIncomeNetOfTax	145000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	-68000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	-141000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	-134000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	-190000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-11467000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	753000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-10863000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	2210000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	1626000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	-641000	USD
	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	2306000	USD
	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	-90000	USD
CY2013Q2	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
	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	-458000	USD
CY2013Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	3866000	USD
CY2012Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	16904000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	20677000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	34524000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-7276000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	572000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-6841000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	1473000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Write Down Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForWriteDownOfSecuritiesIncludedInNetIncomeTax	0	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Write Down Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForWriteDownOfSecuritiesIncludedInNetIncomeTax	0	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Write Down Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForWriteDownOfSecuritiesIncludedInNetIncomeTax	93000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Write Down Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForWriteDownOfSecuritiesIncludedInNetIncomeTax	0	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	-44000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	-91000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	-87000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	-122000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxPortionAttributableToParent	874000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxPortionAttributableToParent	-410000	USD
	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxPortionAttributableToParent	1241000	USD
	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxPortionAttributableToParent	-48000	USD
CY2012Q1	us-gaap	Stockholders Equity StockholdersEquity	1162906000	USD
CY2012Q2	us-gaap	Stockholders Equity StockholdersEquity	1170004000	USD
CY2012Q2	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	209000	USD
CY2012Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1420000	USD
CY2012Q2	us-gaap	Dividends Cash DividendsCash	11435000	USD
CY2013Q1	us-gaap	Stockholders Equity StockholdersEquity	1147580000	USD
CY2013Q2	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1683000	USD
CY2013Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1531000	USD
CY2013Q2	us-gaap	Dividends Cash DividendsCash	21968000	USD
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	1154904000	USD
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	995000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2443000	USD
	us-gaap	Dividends Cash DividendsCash	22862000	USD
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	2901000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2613000	USD
	us-gaap	Dividends Cash DividendsCash	21968000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	303000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-6350000	USD
	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	1859000	USD
	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-5441000	USD
CY2012Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.12
	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	886000	USD
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	35991000	USD
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	106900000	USD
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	51673000	USD
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	95315000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	2613000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	2443000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	77967000	USD
CY2013Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.24
	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.24
	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.24
	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	-832000	USD
	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	584000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	3691000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	4708000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-11200000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-15464000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-21000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	6428000	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-59000	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	19000	USD
	us-gaap	Unrealized Gain Loss On Securities UnrealizedGainLossOnSecurities	-238000	USD
	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	2971000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	61170000	USD
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	227595000	USD
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	144666000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	143939000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	155891000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	21690000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	51170000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	0	USD
	nwbi	Originations Of Loans Receivable Held For Investment OriginationsOfLoansReceivableHeldForInvestment	984068000	USD
	nwbi	Originations Of Loans Receivable Held For Investment OriginationsOfLoansReceivableHeldForInvestment	1030529000	USD
	us-gaap	Proceeds From Principal Repayments On Loans And Leases Held For Investment ProceedsFromPrincipalRepaymentsOnLoansAndLeasesHeldForInvestment	962424000	USD
	us-gaap	Proceeds From Principal Repayments On Loans And Leases Held For Investment ProceedsFromPrincipalRepaymentsOnLoansAndLeasesHeldForInvestment	902818000	USD
	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	1406000	USD
	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-2101000	USD
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	8969000	USD
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	6329000	USD
	us-gaap	Payments To Acquire Real Estate Held For Investment PaymentsToAcquireRealEstateHeldForInvestment	-228000	USD
	us-gaap	Payments To Acquire Real Estate Held For Investment PaymentsToAcquireRealEstateHeldForInvestment	-228000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	7895000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	8561000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	18492000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	25545000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	34000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	34000	USD
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-32669000	USD
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	25223000	USD
	nwbi	Increase Decrease In Advances By Borrowers For Taxes And Insurance IncreaseDecreaseInAdvancesByBorrowersForTaxesAndInsurance	9935000	USD
	nwbi	Increase Decrease In Advances By Borrowers For Taxes And Insurance IncreaseDecreaseInAdvancesByBorrowersForTaxesAndInsurance	8753000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	21968000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	22862000	USD
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	2901000	USD
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	995000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	2198000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	37620000	USD
	us-gaap	Net Cash Provided By Used In Continuing Operations NetCashProvidedByUsedInContinuingOperations	-3549000	USD
	us-gaap	Net Cash Provided By Used In Continuing Operations NetCashProvidedByUsedInContinuingOperations	33571000	USD
	nwbi	Cash Paid For Interest On Deposits And Borrowings CashPaidForInterestOnDepositsAndBorrowings	30926000	USD
	nwbi	Cash Paid For Interest On Deposits And Borrowings CashPaidForInterestOnDepositsAndBorrowings	39801000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	15960000	USD
	nwbi	Purchase Of Common Stock For Employee Stock Ownership Plan PurchaseOfCommonStockForEmployeeStockOwnershipPlan	4459000	USD
	nwbi	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	65	item
CY2013Q2	nwbi	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	6	item
	us-gaap	Income Taxes Paid IncomeTaxesPaid	4292000	USD
	nwbi	Transfer Of Other Real Estate And Other Repossessed Personal Property TransferOfOtherRealEstateAndOtherRepossessedPersonalProperty	7019000	USD
	nwbi	Transfer Of Other Real Estate And Other Repossessed Personal Property TransferOfOtherRealEstateAndOtherRepossessedPersonalProperty	12038000	USD
	nwbi	Sale And Financing Of Other Real Estate Owned SaleAndFinancingOfOtherRealEstateOwned	296000	USD
	nwbi	Sale And Financing Of Other Real Estate Owned SaleAndFinancingOfOtherRealEstateOwned	380000	USD
CY2012Q2	us-gaap	Cash And Due From Banks CashAndDueFromBanks	82295000	USD
CY2012Q2	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	638940000	USD
CY2012Q2	nwbi	Federal Funds Sold And Other Short Term Investments FederalFundsSoldAndOtherShortTermInvestments	633000	USD
	nwbi	Cash Paid For Interest On Deposits CashPaidForInterestOnDeposits	13707000	USD
	nwbi	Cash Paid For Interest On Deposits CashPaidForInterestOnDeposits	20736000	USD
	dei	Entity Registrant Name EntityRegistrantName	Northwest Bancshares, Inc.
	dei	Entity Central Index Key EntityCentralIndexKey	0001471265
	dei	Document Type DocumentType	10-Q
	dei	Document Period End Date DocumentPeriodEndDate	2013-06-30
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2013Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	94093857	shares
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2013
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
CY2013Q2	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
CY2012Q2	nwbi	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	18	item
	nwbi	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	23	item
	nwbi	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	9333000	USD
CY2013Q2	nwbi	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	3722000	USD
CY2012Q2	nwbi	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	20639000	USD
	nwbi	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	23170000	USD
	nwbi	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	8108000	USD
CY2013Q2	nwbi	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	3657000	USD
CY2012Q2	nwbi	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	20258000	USD
	nwbi	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	22230000	USD
	nwbi	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	7495000	USD
CY2013Q2	nwbi	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	2811000	USD
CY2012Q2	nwbi	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	686000	USD
	nwbi	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	1710000	USD
	nwbi	Financing Receivable Modification Allowance For Credit Losses FinancingReceivableModificationAllowanceForCreditLosses	685000	USD
CY2013Q2	nwbi	Financing Receivable Modification Allowance For Credit Losses FinancingReceivableModificationAllowanceForCreditLosses	52000	USD
CY2012Q2	nwbi	Financing Receivable Modification Allowance For Credit Losses FinancingReceivableModificationAllowanceForCreditLosses	641000	USD
	nwbi	Financing Receivable Modification Allowance For Credit Losses FinancingReceivableModificationAllowanceForCreditLosses	717000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-83714000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-65219000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	688297000	USD
CY2013Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	448155000	USD
CY2012Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	721868000	USD
CY2013Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	173000	USD
CY2013Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	90423717	shares
CY2012Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	94294956	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	90413780	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	94205239	shares
CY2013Q2	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	493419	shares
CY2012Q2	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	205921	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	484258	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	377866	shares
CY2013Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	90917136	shares
CY2012Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	94500877	shares
CY2012Q4	nwbi	Financing Receivable Modifications Recorded Investment Non Accrual FinancingReceivableModificationsRecordedInvestmentNonAccrual	41166000	USD
	nwbi	Financing Receivable Modifications Number Of Contracts Remodified FinancingReceivableModificationsNumberOfContractsRemodified	3	item
	nwbi	Financing Receivable Remodifications Post Modification Recorded Investment FinancingReceivableRemodificationsPostModificationRecordedInvestment	3626000	USD
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	90898038	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	94583105	shares
	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	120000	USD
CY2012Q2	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
	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	-862000	USD
CY2013Q2	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	4459000	USD
	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	4459000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	30000000	USD
CY2013Q2	nwbi	Financing Receivable Modifications Recorded Investment Additional Commitment FinancingReceivableModificationsRecordedInvestmentAdditionalCommitment	4138000	USD
CY2012Q4	nwbi	Financing Receivable Modifications Recorded Investment Additional Commitment FinancingReceivableModificationsRecordedInvestmentAdditionalCommitment	2987000	USD
CY2013Q2	nwbi	Financing Receivable Modifications Recorded Investment Non Accrual FinancingReceivableModificationsRecordedInvestmentNonAccrual	42043000	USD
CY2011Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	69429000	USD
	nwbi	Financing Receivable Modifications Recorded Investment Additions FinancingReceivableModificationsRecordedInvestmentAdditions	9333000	USD
	nwbi	Financing Receivable Modifications Recorded Investment Net Paydowns FinancingReceivableModificationsRecordedInvestmentNetPaydowns	7924000	USD
CY2013Q2	nwbi	Financing Receivable Modifications Recorded Investment Accrual FinancingReceivableModificationsRecordedInvestmentAccrual	44474000	USD
	nwbi	Financing Receivable Modifications Recorded Investment Additions FinancingReceivableModificationsRecordedInvestmentAdditions	23170000	USD
	nwbi	Financing Receivable Modifications Recorded Investment Net Paydowns FinancingReceivableModificationsRecordedInvestmentNetPaydowns	12728000	USD
CY2012Q2	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	78471000	USD
CY2012Q2	nwbi	Financing Receivable Modifications Recorded Investment Accrual FinancingReceivableModificationsRecordedInvestmentAccrual	50129000	USD
CY2012Q2	nwbi	Financing Receivable Modifications Recorded Investment Non Accrual FinancingReceivableModificationsRecordedInvestmentNonAccrual	28342000	USD
	nwbi	Financing Receivable Modifications Number Of Contracts Remodified FinancingReceivableModificationsNumberOfContractsRemodified	0	item
CY2013Q2	us-gaap	Allowance For Credit Losses Change In Method Of Calculating Impairment AllowanceForCreditLossesChangeInMethodOfCalculatingImpairment	11788000	USD
CY2012Q4	us-gaap	Allowance For Credit Losses Change In Method Of Calculating Impairment AllowanceForCreditLossesChangeInMethodOfCalculatingImpairment	12774000	USD
	nwbi	Increase Decrease In Financing Receivable Modifications Recorded Investment Reserve IncreaseDecreaseInFinancingReceivableModificationsRecordedInvestmentReserve	587000	USD

Files In Submission

Name	View Source	Status
0001104659-13-062031-index-headers.html	Edgar Link	pending
0001104659-13-062031-index.html	Edgar Link	pending
0001104659-13-062031.txt	Edgar Link	pending
0001104659-13-062031-xbrl.zip	Edgar Link	pending
a13-13717_110q.htm	Edgar Link	pending
a13-13717_1ex31d1.htm	Edgar Link	pending
a13-13717_1ex31d2.htm	Edgar Link	pending
a13-13717_1ex32d1.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	Edgar Link	pending
nwbi-20130630.xml	Edgar Link	completed
nwbi-20130630.xsd	Edgar Link	pending
nwbi-20130630_cal.xml	Edgar Link	unprocessable
nwbi-20130630_def.xml	Edgar Link	unprocessable
nwbi-20130630_lab.xml	Edgar Link	unprocessable
nwbi-20130630_pre.xml	Edgar Link	unprocessable
R1.htm	Edgar Link	pending
R1.xml	Edgar Link	unprocessable
R10.htm	Edgar Link	pending
R10.xml	Edgar Link	unprocessable
R11.htm	Edgar Link	pending
R11.xml	Edgar Link	unprocessable
R12.htm	Edgar Link	pending
R12.xml	Edgar Link	unprocessable
R13.htm	Edgar Link	pending
R13.xml	Edgar Link	unprocessable
R14.htm	Edgar Link	pending
R14.xml	Edgar Link	unprocessable
R15.htm	Edgar Link	pending
R15.xml	Edgar Link	unprocessable
R16.htm	Edgar Link	pending
R16.xml	Edgar Link	unprocessable
R17.htm	Edgar Link	pending
R17.xml	Edgar Link	unprocessable
R18.htm	Edgar Link	pending
R18.xml	Edgar Link	unprocessable
R19.htm	Edgar Link	pending
R19.xml	Edgar Link	unprocessable
R2.htm	Edgar Link	pending
R2.xml	Edgar Link	unprocessable
R20.htm	Edgar Link	pending
R20.xml	Edgar Link	unprocessable
R21.htm	Edgar Link	pending
R21.xml	Edgar Link	unprocessable
R22.htm	Edgar Link	pending
R22.xml	Edgar Link	unprocessable
R23.htm	Edgar Link	pending
R23.xml	Edgar Link	unprocessable
R24.htm	Edgar Link	pending
R24.xml	Edgar Link	unprocessable
R25.htm	Edgar Link	pending
R25.xml	Edgar Link	unprocessable
R26.htm	Edgar Link	pending
R26.xml	Edgar Link	unprocessable
R27.htm	Edgar Link	pending
R27.xml	Edgar Link	unprocessable
R28.htm	Edgar Link	pending
R28.xml	Edgar Link	unprocessable
R29.htm	Edgar Link	pending
R29.xml	Edgar Link	unprocessable
R3.htm	Edgar Link	pending
R3.xml	Edgar Link	unprocessable
R30.htm	Edgar Link	pending
R30.xml	Edgar Link	unprocessable
R31.htm	Edgar Link	pending
R31.xml	Edgar Link	unprocessable
R32.htm	Edgar Link	pending
R32.xml	Edgar Link	unprocessable
R33.htm	Edgar Link	pending
R33.xml	Edgar Link	unprocessable
R34.htm	Edgar Link	pending
R34.xml	Edgar Link	unprocessable
R35.htm	Edgar Link	pending
R35.xml	Edgar Link	unprocessable
R36.htm	Edgar Link	pending
R36.xml	Edgar Link	unprocessable
R37.htm	Edgar Link	pending
R37.xml	Edgar Link	unprocessable
R38.htm	Edgar Link	pending
R38.xml	Edgar Link	unprocessable
R39.htm	Edgar Link	pending
R39.xml	Edgar Link	unprocessable
R4.htm	Edgar Link	pending
R4.xml	Edgar Link	unprocessable
R40.htm	Edgar Link	pending
R40.xml	Edgar Link	unprocessable
R41.htm	Edgar Link	pending
R41.xml	Edgar Link	unprocessable
R42.htm	Edgar Link	pending
R42.xml	Edgar Link	unprocessable
R43.htm	Edgar Link	pending
R43.xml	Edgar Link	unprocessable
R44.htm	Edgar Link	pending
R44.xml	Edgar Link	unprocessable
R45.htm	Edgar Link	pending
R45.xml	Edgar Link	unprocessable
R46.htm	Edgar Link	pending
R46.xml	Edgar Link	unprocessable
R47.htm	Edgar Link	pending
R47.xml	Edgar Link	unprocessable
R48.htm	Edgar Link	pending
R48.xml	Edgar Link	unprocessable
R49.htm	Edgar Link	pending
R49.xml	Edgar Link	unprocessable
R5.htm	Edgar Link	pending
R5.xml	Edgar Link	unprocessable
R50.htm	Edgar Link	pending
R50.xml	Edgar Link	unprocessable
R51.htm	Edgar Link	pending
R51.xml	Edgar Link	unprocessable
R52.htm	Edgar Link	pending
R52.xml	Edgar Link	unprocessable
R53.htm	Edgar Link	pending
R53.xml	Edgar Link	unprocessable
R54.htm	Edgar Link	pending
R54.xml	Edgar Link	unprocessable
R55.htm	Edgar Link	pending
R55.xml	Edgar Link	unprocessable
R56.htm	Edgar Link	pending
R56.xml	Edgar Link	unprocessable
R57.htm	Edgar Link	pending
R57.xml	Edgar Link	unprocessable
R58.htm	Edgar Link	pending
R58.xml	Edgar Link	unprocessable
R59.htm	Edgar Link	pending
R59.xml	Edgar Link	unprocessable
R6.htm	Edgar Link	pending
R6.xml	Edgar Link	unprocessable
R60.htm	Edgar Link	pending
R60.xml	Edgar Link	unprocessable
R61.htm	Edgar Link	pending
R61.xml	Edgar Link	unprocessable
R62.htm	Edgar Link	pending
R62.xml	Edgar Link	unprocessable
R63.htm	Edgar Link	pending
R63.xml	Edgar Link	unprocessable
R64.htm	Edgar Link	pending
R64.xml	Edgar Link	unprocessable
R65.htm	Edgar Link	pending
R65.xml	Edgar Link	unprocessable
R66.htm	Edgar Link	pending
R66.xml	Edgar Link	unprocessable
R67.htm	Edgar Link	pending
R67.xml	Edgar Link	unprocessable
R68.htm	Edgar Link	pending
R68.xml	Edgar Link	unprocessable
R69.htm	Edgar Link	pending
R69.xml	Edgar Link	unprocessable
R7.htm	Edgar Link	pending
R7.xml	Edgar Link	unprocessable
R70.htm	Edgar Link	pending
R70.xml	Edgar Link	unprocessable
R71.htm	Edgar Link	pending
R71.xml	Edgar Link	unprocessable
R8.htm	Edgar Link	pending
R8.xml	Edgar Link	unprocessable
R9.htm	Edgar Link	pending
R9.xml	Edgar Link	unprocessable
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$NWBI
Northwest Bancshares, Inc. Stock $nwbi

2013 Q2 Form 10-Q Financial Statement

#000110465913062031 Filed on August 09, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NWBI Northwest Bancshares, Inc. Stock $nwbi

2013 Q2 Form 10-Q Financial Statement

#000110465913062031 Filed on August 09, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NWBI
Northwest Bancshares, Inc. Stock $nwbi