LOANS, Average Balance of Loans Individually Evaluated For Impairment (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Financing receivable average balance individually evaluated for impairment [Line Items]
Average Recorded Investment	$ 17,668	$ 30,211	$ 49,690
Interest Income Recognized	2,745	1,524	4,472
Cash Basis Interest Recognized	2,733	1,486	4,416
Residential Real Estate [Member]
Financing receivable average balance individually evaluated for impairment [Line Items]
Average Recorded Investment	1,964	4,069	8,887
Interest Income Recognized	267	180	518
Cash Basis Interest Recognized	267	171	516
Multifamily Real Estate [Member]
Financing receivable average balance individually evaluated for impairment [Line Items]
Average Recorded Investment	2,221	3,810	6,143
Interest Income Recognized	782	847	1,408
Cash Basis Interest Recognized	782	845	1,406
Owner Occupied Commercial Real Estate [Member]
Financing receivable average balance individually evaluated for impairment [Line Items]
Average Recorded Investment	2,139	2,602	7,195
Interest Income Recognized	179	168	1,025
Cash Basis Interest Recognized	174	141	1,028
Non Owner Occupied Commercial Real Estate [Member]
Financing receivable average balance individually evaluated for impairment [Line Items]
Average Recorded Investment	2,085	2,509	9,785
Interest Income Recognized	711	9	73
Cash Basis Interest Recognized	704	9	79
Commercial and Industrial [Member]
Financing receivable average balance individually evaluated for impairment [Line Items]
Average Recorded Investment	1,912	8,425	10,052
Interest Income Recognized	657	47	427
Cash Basis Interest Recognized	657	47	417
Consumer [Member]
Financing receivable average balance individually evaluated for impairment [Line Items]
Average Recorded Investment	0	0	29
Interest Income Recognized	0	0	2
Cash Basis Interest Recognized	0	0	2
All Other [Member]
Financing receivable average balance individually evaluated for impairment [Line Items]
Average Recorded Investment	7,347	8,796	7,599
Interest Income Recognized	149	273	1,019
Cash Basis Interest Recognized	$ 149	$ 273	$ 968

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

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5212-111524

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 17

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5258-111524

+ Details

Name:	us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

+ Details

Name:	us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of interest income recognized on a cash-basis method of accounting that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

+ Details

Name:	us-gaap_ImpairedFinancingReceivableInterestIncomeCashBasisMethod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=pfbi_MultifamilyRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=pfbi_NonOwnerOccupiedCommercialRealEstateMortgageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=pfbi_OwnerOccupiedCommercialRealEstateMortgageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConsumerLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_UnallocatedFinancingReceivablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: