XML 35 R22.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Accumulated Other Comprehensive Income (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2013
Accumulated Other Comprehensive Income [Abstract] |
Components of Accumulated Other Comprehensive Income [Table Text Block] |
|  |  |  | Unrealized gains on available for sale securities (a)
Balance as of December 31, 2012 |  |  | $ | 2,797
Other comprehensive loss before reclassification |  |  |  | (571)
Amount reclassified from accumulated other comprehensive income |  |  |  | (91)
Total other comprehensive loss |  |  |  | (662)
Balance as of March 31, 2013 |  |  | $ | 2,135
Items Reclassified Out of Each Component of OCI [Table Text Block] |
Details about other comprehensive income |  | Amount Reclassified From Accumulated Other Comprehensive Income (a) |  | Affected Line Item in the Statement Where Net Income is Presented
Unrealized gains on available for sale securities | $ | 138 |  | Net realized gains on sales of securities
|  | (47) |  | Income tax expense
| $ | 91 |  | Net of tax

X
- Definition Schedule of Items Reclassified Out Of Components Of Other Comprehensive Income + References No definition available. + Details
Name: | nwfl_ScheduleOfItemsReclassifiedOutOfComponentsOfOtherComprehensiveIncome
Namespace Prefix: | nwfl_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=20435746&loc=SL7669686-108580 + Details
Name: | us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration