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STOCK COMPENSATION EXPENSE (Details) (USD $)
3 Months Ended 0 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 18, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period, description three equal annual installments three equal annual installments  
Stock option vesting periods 3 years 3 years  
Grants (in shares) 47,650us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross 46,300us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross  
Grants (in dollars per share) $ 14.72us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice $ 14.43us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice  
Compensation expense $ 139,000us-gaap_ShareBasedCompensation $ 42,000us-gaap_ShareBasedCompensation  
Unrecognized stock-based compensation expense 134,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized    
Unrecognized stock-based compensation, period of recognition 35 months    
2012 Long Term Incentive Plan [Member] | Robert W. Walker [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Grants (in shares)     7,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_PlanNameAxis
= pfbi_LongTermIncentivePlanMember
/ us-gaap_TitleOfIndividualAxis
= pfbi_PresidentAndChiefExecutiveOfficerMember
Fair value of stock options granted (in dollars per share)     $ 14.72us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= pfbi_LongTermIncentivePlanMember
/ us-gaap_TitleOfIndividualAxis
= pfbi_PresidentAndChiefExecutiveOfficerMember
Compensation expense     $ 103,000us-gaap_ShareBasedCompensation
/ us-gaap_PlanNameAxis
= pfbi_LongTermIncentivePlanMember
/ us-gaap_TitleOfIndividualAxis
= pfbi_PresidentAndChiefExecutiveOfficerMember