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Loans Receivable and Allowance for Loan Losses (Troubled Debt Restructurings) (Details) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Loans Receivable and Allowance for Loan Losses [Abstract]
New Loans Identified as Troubled Debt Restructurings	$ 0	$ 1,300,000
Financing Receivable, Modifications, Recorded Investment	$ 5,300,000	$ 9,200,000

X

- Definition

Loans Identified as Troubled Debt Restructurings during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	nwfl_
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X

- Definition

The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 40

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554

+ Details

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Balance Type:	debit
Period Type:	instant

X

- Details

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