FAIR VALUE, Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Securities available for sale
Available for sale, Fair Value	$ 226,077	$ 229,750
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Securities available for sale
Available for sale, Fair Value	0	0
Significant Other Observable Inputs (Level 2) [Member]
Securities available for sale
Available for sale, Fair Value	226,077	229,610
Significant Unobservable Inputs (Level 3) [Member]
Securities available for sale
Available for sale, Fair Value	0	140
Carrying Value [Member]
Securities available for sale
Available for sale, Fair Value	226,077	229,750
Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Securities available for sale
U. S. agency MBS - residential	0	0
U. S. agency CMO's - residential	0	0
Total mortgage-backed securities of government sponsored agencies	0	0
U. S. government sponsored agency securities	0	0
Obligations of states and political subdivisions	0	0
Available for sale, Fair Value	0	0
Recurring [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Securities available for sale
U. S. agency MBS - residential	76,416	52,780
U. S. agency CMO's - residential	124,877	144,188
Total mortgage-backed securities of government sponsored agencies	201,293	196,968
U. S. government sponsored agency securities	14,561	22,506
Obligations of states and political subdivisions	10,223	10,136
Available for sale, Fair Value	226,077	229,610
Recurring [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Securities available for sale
U. S. agency MBS - residential	0	0
U. S. agency CMO's - residential	0	0
Total mortgage-backed securities of government sponsored agencies	0	0
U. S. government sponsored agency securities	0	0
Obligations of states and political subdivisions	0	140
Available for sale, Fair Value	0	140
Recurring [Member] \| Carrying Value [Member]
Securities available for sale
U. S. agency MBS - residential	76,416	52,780
U. S. agency CMO's - residential	124,877	144,188
Total mortgage-backed securities of government sponsored agencies	201,293	196,968
U. S. government sponsored agency securities	14,561	22,506
Obligations of states and political subdivisions	10,223	10,276
Available for sale, Fair Value	$ 226,077	$ 229,750

Fair value disclosure of obligations of states and political subdivisions.

No definition available.

Name:	pfbi_ObligationsOfStatesAndPoliticalSubdivisionsFairValueDisclosure
Namespace Prefix:	pfbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value disclosure of total mortgage-backed-securities of government sponsored agencies.

+ References

No definition available.

+ Details

Name:	pfbi_TotalMortgageBackedSecuritiesOfGovernmentSponsoredAgenciesFairValueDisclosure
Namespace Prefix:	pfbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The fair value disclosure of U.S. agency CMO's - residential.

+ References

No definition available.

+ Details

Name:	pfbi_USAgencyCmoSResidentialFairValueDisclosure
Namespace Prefix:	pfbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value disclosure of U.S. government agency sponsored securities.

+ References

No definition available.

+ Details

Name:	pfbi_USGovernmentSponsoredAgencySecuritiesFairValueDisclosure
Namespace Prefix:	pfbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 5

-Subparagraph (aa)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562

+ Details

Name:	us-gaap_AvailableForSaleSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

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

- Definition

Fair value of securitized, pay-through debt securities collateralized by real estate mortgage loans classified as available-for-sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Mortgage-Backed Securities

-URI http://asc.fasb.org/extlink&oid=6517959

+ Details

Name:	us-gaap_MortgageBackedSecuritiesAvailableForSaleFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByMeasurementBasisAxis=us-gaap_CarryingReportedAmountFairValueDisclosureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: