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Consolidated Statements of Changes in Stockholders' Equity (parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Consolidated Statements of Changes in Stockholders' Equity [Abstract]
Common Stock, Dividends, Per Share, Declared	$ (1.2)us-gaap_CommonStockDividendsPerShareDeclared	$ (1.16)us-gaap_CommonStockDividendsPerShareDeclared	$ (1.1)us-gaap_CommonStockDividendsPerShareDeclared
Common Stock, Dividend Rate, Percentage		10.00%nwfl_CommonStockDividendRatePercentage

X

- Definition

The percentage rate used to calculate dividend payments on common stock.

+ References

No definition available.

+ Details

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Namespace Prefix:	nwfl_
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Period Type:	duration

X

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

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- Details

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