FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Off-balance Sheet Risks, Disclosure Information [Line Items]
Fixed rate loan commitments, interest rate range, minimum	2.25%
Fixed rate loan commitments, interest rate range, maximum	21.00%
Overdraft Protection [Member]
Off-balance Sheet Risks, Disclosure Information [Line Items]
Unused portion of overdraft protection	$ 13,459	$ 14,128
Standby letters of credit [Member]
Off-balance Sheet Risks, Disclosure Information [Line Items]
Off balance sheet risk, contract amount	6,700	7,593
Commitments to extend credit - Fixed [Member]
Off-balance Sheet Risks, Disclosure Information [Line Items]
Off balance sheet risk, contract amount	15,898	19,904
Commitments to extend credit - Variable [Member]
Off-balance Sheet Risks, Disclosure Information [Line Items]
Off balance sheet risk, contract amount	$ 78,482	$ 60,183

- Definition

When presenting a range of interest rates, the highest stated (contractual) rate for funds committed under the debt agreement as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	pfbi_FixedRateLoanCommitmentsInterestRateRangeMaximum
Namespace Prefix:	pfbi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

When presenting a range of interest rates, the lowest stated (contractual) rate for funds committed under the debt agreement as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	pfbi_FixedRateLoanCommitmentsInterestRateRangeMinimum
Namespace Prefix:	pfbi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of unused overdraft protection that is available to customers.

+ References

No definition available.

+ Details

Name:	pfbi_UnusedPortionOfOverdraftProtection
Namespace Prefix:	pfbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments.

+ References

No definition available.

+ Details

Name:	us-gaap_ContractualObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_FairValueOffBalanceSheetRisksDisclosureInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_UnusedLinesOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_StandbyLettersOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CommitmentsToExtendCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=pfbi_CommitmentsToExtendCreditVariableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: