XML 19 R53.htm IDEA: XBRL DOCUMENT v3.19.3

Fair Value of Assets and Liabilities (Narrative) (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019 USD ($) loan	Dec. 31, 2018 USD ($) loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of impaired loans not requiring a valuation allowance | loan		6
Impaired Loans, Cumulative Charge-Offs | $	$ 587	$ 428
Number of impaired loans requiring a valuation allowance | loan	5
Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value | $	$ 514	$ 1,319

X

- Definition

Cumulative amount of charge-offs against impaired financing receivables over their respective lives.

+ References

No definition available.

+ Details

Name:	nwfl_ImpairedLoansCumulativeChargeOffs
Namespace Prefix:	nwfl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The number of impaired loans during the period for which a valuation allowance was not required due to the estimated realizable value of the collateral exceeding the recorded investment in the loans.

+ References

No definition available.

+ Details

Name:	nwfl_NumberOfImpairedLoansNotRequiringValuationAllowance
Namespace Prefix:	nwfl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of impaired loans during the period for which a valuation allowance was required.

+ References

No definition available.

+ Details

Name:	nwfl_NumberOfImpairedLoansRequiringValuationAllowance
Namespace Prefix:	nwfl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

Name:	us-gaap_AssetsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_FairValueByAssetClassAxis=nwfl_ImpairedLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: