Disclosures About Fair Value of Assets - Nonrecurring Measurements (Details) $ in Thousands	3 Months Ended
Mar. 31, 2025 loan	Mar. 31, 2024 USD ($)
Disclosures About Fair Value of Assets
Number of loans to have credit losses	0	0

The number of loans that were determined to have credit losses. during the period.

No definition available.

Name:	pfsb_NumberOfLoansToHaveCreditLosses
Namespace Prefix:	pfsb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration