Fair Value and Interest Rate Risk - Narrative (Details)	Jun. 30, 2023 $ / shares
Fair Value Disclosures [Abstract]
Stock value par value (in usd per share)	$ 100

Represents information about stock value par or stated value per share.

No definition available.

Name:	pnbk_StockValueParOrStatedValuePerShare
Namespace Prefix:	pnbk_
Data Type:	dtr-types1:perShareItemType
Balance Type:	na
Period Type:	instant