XML 109 R92.htm IDEA: XBRL DOCUMENT v3.22.4

Stock Based Compensation (Schedule of Outstanding Stock Options) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	218,975	226,075	215,970
Average Exercise Price	$ 26.70	$ 26.37	$ 25.73
Remaining Life, Years	6 years 9 months 18 days
Options Exercisable	180,975	182,575
Average Exercise Price	$ 27.68	$ 26.50
Average Exercise Price 1 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	11,125
Average Exercise Price	$ 17.93
Remaining Life, Years	1 year
Options Exercisable	11,125
Average Exercise Price	$ 17.93
Average Exercise Price 2 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	8,250
Average Exercise Price	$ 19.39
Remaining Life, Years	1 year 10 months 24 days
Options Exercisable	8,250
Average Exercise Price	$ 19.39
Average Exercise Price 3 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	9,375
Average Exercise Price	$ 19.03
Remaining Life, Years	2 years 10 months 24 days
Options Exercisable	9,375
Average Exercise Price	$ 19.03
Average Exercise Price 4 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	12,125
Average Exercise Price	$ 22.37
Remaining Life, Years	4 years
Options Exercisable	12,125
Average Exercise Price	$ 22.37
Average Exercise Price 5 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	25,250
Average Exercise Price	$ 32.81
Remaining Life, Years	5 years
Options Exercisable	25,250
Average Exercise Price	$ 32.81
Average Exercise Price 6 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	22,100
Average Exercise Price	$ 32.34
Remaining Life, Years	6 years
Options Exercisable	22,100
Average Exercise Price	$ 32.34
Average Exercise Price 7 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	22,500
Average Exercise Price	$ 36.02
Remaining Life, Years	7 years
Options Exercisable	22,500
Average Exercise Price	$ 36.02
Average Exercise Price 8 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	30,750
Average Exercise Price	$ 26.93
Remaining Life, Years	8 years
Options Exercisable	30,750
Average Exercise Price	$ 26.93
Average Exercise Price 9 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	1,000
Average Exercise Price	$ 26.35
Remaining Life, Years	8 years 3 months 18 days
Options Exercisable	1,000
Average Exercise Price	$ 26.35
Average Exercise Price 10 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	1,000
Average Exercise Price	$ 25.38
Remaining Life, Years	8 years 6 months
Options Exercisable	1,000
Average Exercise Price	$ 25.38
Average Exercise Price 11 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	37,500
Average Exercise Price	$ 25.80
Remaining Life, Years	9 years
Options Exercisable	37,500
Average Exercise Price	$ 25.80
Average Exercise Price 12 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	38,000
Average Exercise Price	$ 33.53
Remaining Life, Years	10 years

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

X

- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(ii)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(ii)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)(1)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

+ Details

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=nwfl_AverageExercisePrice4Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=nwfl_AverageExercisePrice5Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=nwfl_AverageExercisePrice6Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=nwfl_AverageExercisePrice7Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=nwfl_AverageExercisePrice8Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=nwfl_AverageExercisePrice9Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=nwfl_AverageExercisePrice10Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=nwfl_AverageExercisePrice11Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=nwfl_AverageExercisePrice12Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=nwfl_AverageExercisePrice1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=nwfl_AverageExercisePrice2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=nwfl_AverageExercisePrice3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: