FAIR VALUE, Recurring (Details) (Recurring [Member], USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
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
Other securities	0	0
Total available for sale	0	0
Significant Other Observable Inputs (Level 2) [Member]
Securities available for sale
U. S. agency MBS - residential	44,022	40,255
U. S. agency CMO's - residential	217,082	205,738
Total mortgage-backed securities of government sponsored agencies	261,104	245,993
U. S. government sponsored agency securities	29,247	18,141
Obligations of states and political subdivisions	9,429	9,510
Other securities	5,448	4,695
Total available for sale	305,228	278,339
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	140	140
Other securities	0	0
Total available for sale	140	140
Carrying Amount [Member]
Securities available for sale
U. S. agency MBS - residential	44,022	40,255
U. S. agency CMO's - residential	217,082	205,738
Total mortgage-backed securities of government sponsored agencies	261,104	245,993
U. S. government sponsored agency securities	29,247	18,141
Obligations of states and political subdivisions	9,569	9,650
Other securities	5,448	4,695
Total available for sale	$ 305,368	$ 278,479

Fair value disclosure of obligations of states and political subdivisions.

No definition available.

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- Definition

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

+ References

No definition available.

+ Details

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Namespace Prefix:	pfbi_
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- Definition

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

+ References

No definition available.

+ Details

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Namespace Prefix:	pfbi_
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- Definition

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

+ References

No definition available.

+ Details

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Namespace Prefix:	pfbi_
Data Type:	xbrli:monetaryItemType
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- Definition

This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

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- Details

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

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents securitized, pay-through debt securities collateralized by real estate mortgage loans (mortgages) as of the balance sheet date which have been categorized as available-for-sale.

+ References

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

-Publisher AICPA

-Name Audit and Accounting Guide (AAG)

-Number AAG-DEP

-Paragraph 15

-IssueDate 2006-05-01

-Chapter 7

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: 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

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This element represents the fair value of assets categorized as other which are not in and of themselves material enough to require separate disclosure.

+ References

No definition available.

+ Details

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