Fair Value Measurements and Disclosures - Additional Information (Detail)	12 Months Ended
Dec. 31, 2018 USD ($)
Fair Value Disclosures [Abstract]
Minimum current appraisal is more than one year old and/or the loan balance	$ 200,000
Percentage of time deposits provide for automatic renewal at current interest rates	98.00%

The percentage of time deposits for which customers have opted for an automatic renewal upon maturity.

No definition available.

Name:	pfbx_PercentageOfTimeDepositsProvideForAutomaticRenewalAtCurrentInterestRates
Namespace Prefix:	pfbx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration