Deposits (Narrative) (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Deposits:
Time Deposits, $250,000 or More	$ 269,499,000	$ 213,623,000

The aggregate amount of domestic and foreign time deposit liabilities (including certificates of deposits, individual retirement accounts and open accounts) in denominations of $250,000 or more.

No definition available.

Name:	nwfl_TimeDeposits250000OrMore
Namespace Prefix:	nwfl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant