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SUBSEQUENT EVENT (Details) (USD $)
 0 Months Ended
May 06, 2015
Mar. 31, 2015
Dec. 31, 2014
Subsequent Event [Line Items]      
Common Equity Tier I Capital (to Risk-Weighted Assets) (in hundredths)   13.20%pfbi_TierOneRiskBasedCommonEquityToRiskWeightedAssets  
Common Equity Tier I Capital (to Risk-Weighted Assets), Regulatory Minimum Requirements (in hundredths)   4.50%pfbi_TierOneRiskBasedCommonEquityRequiredForCapitalAdequacyToRiskWeightedAssets  
Common Equity Tier I Capital (to Risk-Weighted Assets), To Be Considered Well Capitalized (in hundredths)   6.50%pfbi_TierOneRiskBasedCommonEquityRequiredToBeWellCapitalizedToRiskWeightedAssets  
Tier I Capital (to Risk-Weighted Assets) (in hundredths)   13.20%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets 13.30%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets
Tier I Capital (to Risk-Weighted Assets), Regulatory Minimum Requirements (in hundredths)   6.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets [1]  
Tier I Capital (to Risk-Weighted Assets), To Be Considered Well Capitalized (in hundredths)   8.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets [1]  
Total Capital (to Risk-Weighted Assets) (in hundredths)   14.40%us-gaap_CapitalToRiskWeightedAssets 14.60%us-gaap_CapitalToRiskWeightedAssets
Total Capital (to Risk-Weighted Assets), Regulatory Minimum Requirements (in hundredths)   8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets  
Total Capital (to Risk-Weighted Assets), To Be Considered Well Capitalized (in hundredths)   10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets  
Tier I Capital (to Average Assets) (in hundredths)   9.40%us-gaap_TierOneLeverageCapitalToAverageAssets 9.10%us-gaap_TierOneLeverageCapitalToAverageAssets
Tier I Capital (to Average Assets), Regulatory Minimum Requirements (in hundredths)   4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets  
Tier I Capital (to Average Assets), To Be Considered Well Capitalized (in hundredths)   5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets  
Subsequent Event [Member]      
Subsequent Event [Line Items]      
Reduction in shareholders' equity and regulatory capital $ 5,675,000us-gaap_StockholdersEquityPeriodIncreaseDecrease
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Reduction in dilutive effect of potential additional common shares (in shares) 415,000pfbi_ReductionInTheDilutiveEffectOfPotentialAdditionalCommonShares
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Subsequent Event [Member] | Pro Forma [Member]      
Subsequent Event [Line Items]      
Common Equity Tier I Capital (to Risk-Weighted Assets) (in hundredths)   12.60%pfbi_TierOneRiskBasedCommonEquityToRiskWeightedAssets
/ us-gaap_StatementScenarioAxis
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Common Equity Tier I Capital (to Risk-Weighted Assets), Regulatory Minimum Requirements (in hundredths)   4.50%pfbi_TierOneRiskBasedCommonEquityRequiredForCapitalAdequacyToRiskWeightedAssets
/ us-gaap_StatementScenarioAxis
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Common Equity Tier I Capital (to Risk-Weighted Assets), To Be Considered Well Capitalized (in hundredths)   6.50%pfbi_TierOneRiskBasedCommonEquityRequiredToBeWellCapitalizedToRiskWeightedAssets
/ us-gaap_StatementScenarioAxis
= us-gaap_ProFormaMember
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Tier I Capital (to Risk-Weighted Assets) (in hundredths)   12.60%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets
/ us-gaap_StatementScenarioAxis
= us-gaap_ProFormaMember
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= us-gaap_SubsequentEventMember		  
Tier I Capital (to Risk-Weighted Assets), Regulatory Minimum Requirements (in hundredths)   6.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ us-gaap_StatementScenarioAxis
= us-gaap_ProFormaMember
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Tier I Capital (to Risk-Weighted Assets), To Be Considered Well Capitalized (in hundredths)   8.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
/ us-gaap_StatementScenarioAxis
= us-gaap_ProFormaMember
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= us-gaap_SubsequentEventMember		  
Total Capital (to Risk-Weighted Assets) (in hundredths)   13.80%us-gaap_CapitalToRiskWeightedAssets
/ us-gaap_StatementScenarioAxis
= us-gaap_ProFormaMember
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Total Capital (to Risk-Weighted Assets), Regulatory Minimum Requirements (in hundredths)   8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
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= us-gaap_ProFormaMember
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Total Capital (to Risk-Weighted Assets), To Be Considered Well Capitalized (in hundredths)   10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
/ us-gaap_StatementScenarioAxis
= us-gaap_ProFormaMember
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= us-gaap_SubsequentEventMember		  
Tier I Capital (to Average Assets) (in hundredths)   9.00%us-gaap_TierOneLeverageCapitalToAverageAssets
/ us-gaap_StatementScenarioAxis
= us-gaap_ProFormaMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		  
Tier I Capital (to Average Assets), Regulatory Minimum Requirements (in hundredths)   4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
/ us-gaap_StatementScenarioAxis
= us-gaap_ProFormaMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		  
Tier I Capital (to Average Assets), To Be Considered Well Capitalized (in hundredths)   5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets
/ us-gaap_StatementScenarioAxis
= us-gaap_ProFormaMember
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Subsequent Event [Member] | U.S. Treasury [Member]      
Subsequent Event [Line Items]      
Payments for purchase of warrants 5,675,000us-gaap_PaymentsToAcquireInvestments
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= us-gaap_USTreasurySecuritiesMember
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Subsequent Event [Member] | U.S. Treasury [Member] | Bank of Kentucky [Member]      
Subsequent Event [Line Items]      
Purchase of warrant, line of credit 4,000,000us-gaap_LineOfCredit
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/ dei_LegalEntityAxis
= pfbi_BankOfKentuckyMember
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Subsequent Event [Member] | U.S. Treasury [Member] | Cash and Cash Equivalents [Member]      
Subsequent Event [Line Items]      
Payments for purchase of warrants $ 1,675,000us-gaap_PaymentsToAcquireInvestments
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[1] The regulatory requirements presented in the table are effective as of January 1, 2015. At December 31, 2014, the minimum Tier 1 capital to risk-weighted assets ratio was 4.0% and to be considered well capitalized the ratio was required to be at least 6.0%.