XML 177 R29.htm IDEA: XBRL DOCUMENT
v3.20.1

Summary of Significant Accounting Policies (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
Summary of Significant Accounting Policies [Abstract] |
Schedule of Estimated Useful Lives |
﻿ |  |
﻿ |  |
﻿ | Years |
﻿Buildings and improvements | 10 - 40 |
﻿Furniture and equipment | 3 - 10 |
﻿
Schedule of Estimated Future Amortization Expense for the Core Deposit Intangible |
﻿ |  |
﻿ |  |
﻿ |  |
﻿2020 | $ | 77
﻿2021 |  | 52
﻿2022 |  | 38
﻿2023 |  | 29
﻿2024 |  | 21
﻿Thereafter |  | 18
﻿ | $ | 235
﻿ |  |
﻿

X
- Definition Tabular disclosure of the useful lives of the different classes of premises and equipment. + References No definition available. + Details
Name: | nwfl_PremisesAndEquipmentScheduleOfUsefulLifeTableTextBlock
Namespace Prefix: | nwfl_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration