XML 43 R33.htm IDEA: XBRL DOCUMENT v3.10.0.1

Revenue Recognition (Narrative) (Details)	6 Months Ended
	Jun. 30, 2018
Interest Income on Loans and Investment, Noninterest Revenue from Investment Security Gains, Loan Servicing, Gains on the Sale of Loans, Commitment Fees, and Fees from Financial Guarantees [Member]
Percentage of total revenue	94.20%

X

- Definition

Percentage Of Total Revenue

+ References

No definition available.

+ Details

Name:	nwfl_PercentageOfTotalRevenue
Namespace Prefix:	nwfl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ProductOrServiceAxis=nwfl_InterestIncomeOnLoansAndInvestmentNoninterestRevenueFromInvestmentSecurityGainsLoanServicingGainsOnSaleOfLoansCommitmentFeesAndFeesFromFinancialGuaranteesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: