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Loans Held for Investment (Details 4) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
item
Dec. 31, 2013
Loans Held for Investment    
Number of areas where the entity's credit quality is maintained and credit risk managed 2ppbi_FinancingReceivableCreditQualityAndCreditRiskManagementAreaNumber  
Number of Pass scale grades 6ppbi_FinancingReceivableCreditQualityPassGradeNumber  
Credit Risk Grades    
Total Gross Loans $ 1,628,445ppbi_LoansReceivableGross $ 1,243,252ppbi_LoansReceivableGross
Business loans: Commercial and industrial    
Credit Risk Grades    
Total Gross Loans 428,207ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_CommercialAndIndustrialBusinessLoanMember		 187,035ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_CommercialAndIndustrialBusinessLoanMember
Business loans: Commercial owner occupied    
Credit Risk Grades    
Total Gross Loans 210,995ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_CommercialOwnerOccupiedBusinessLoanMember		 221,089ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_CommercialOwnerOccupiedBusinessLoanMember
Business loans: SBA    
Credit Risk Grades    
Total Gross Loans 28,404ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_SmallBusinessAdministrationLoansMember		 10,659ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_SmallBusinessAdministrationLoansMember
Business loans: Warehouse facilities    
Credit Risk Grades    
Total Gross Loans 113,798ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_WarehouseFacilitiesBusinessLoanMember		 87,517ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_WarehouseFacilitiesBusinessLoanMember
Real estate loans: Commercial non-owner occupied    
Credit Risk Grades    
Total Gross Loans 359,213ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_CommercialNonOwnerOccupiedRealEstateLoanMember		 333,544ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_CommercialNonOwnerOccupiedRealEstateLoanMember
Real estate loans: Multi-family    
Credit Risk Grades    
Total Gross Loans 262,965ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_MultiFamilyRealEstateLoanMember		 233,689ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_MultiFamilyRealEstateLoanMember
Real estate loans: One-to-four family    
Credit Risk Grades    
Total Gross Loans 122,795ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_OneToFourFamilyRealEstateLoanMember		 145,235ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_OneToFourFamilyRealEstateLoanMember
Real estate loans: Construction    
Credit Risk Grades    
Total Gross Loans 89,682ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember		 13,040ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
Real estate loans: Land    
Credit Risk Grades    
Total Gross Loans 9,088ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_RealEstateLandMember		 7,605ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_RealEstateLandMember
Other loans    
Credit Risk Grades    
Total Gross Loans 3,298ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_OtherLoansReceivableMember		 3,839ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_OtherLoansReceivableMember
Pass    
Credit Risk Grades    
Total Gross Loans 1,612,143ppbi_LoansReceivableGross
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 1,221,125ppbi_LoansReceivableGross
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Pass | Business loans: Commercial and industrial    
Credit Risk Grades    
Total Gross Loans 426,379ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_CommercialAndIndustrialBusinessLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 184,247ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_CommercialAndIndustrialBusinessLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Pass | Business loans: Commercial owner occupied    
Credit Risk Grades    
Total Gross Loans 202,390ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_CommercialOwnerOccupiedBusinessLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 207,872ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_CommercialOwnerOccupiedBusinessLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Pass | Business loans: SBA    
Credit Risk Grades    
Total Gross Loans 28,132ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_SmallBusinessAdministrationLoansMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 10,659ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_SmallBusinessAdministrationLoansMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Pass | Business loans: Warehouse facilities    
Credit Risk Grades    
Total Gross Loans 113,798ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_WarehouseFacilitiesBusinessLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 87,517ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_WarehouseFacilitiesBusinessLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Pass | Real estate loans: Commercial non-owner occupied    
Credit Risk Grades    
Total Gross Loans 355,274ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_CommercialNonOwnerOccupiedRealEstateLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 329,538ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_CommercialNonOwnerOccupiedRealEstateLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Pass | Real estate loans: Multi-family    
Credit Risk Grades    
Total Gross Loans 261,956ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_MultiFamilyRealEstateLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 232,661ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_MultiFamilyRealEstateLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Pass | Real estate loans: One-to-four family    
Credit Risk Grades    
Total Gross Loans 122,146ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_OneToFourFamilyRealEstateLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 144,152ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_OneToFourFamilyRealEstateLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Pass | Real estate loans: Construction    
Credit Risk Grades    
Total Gross Loans 89,682ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 13,040ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Pass | Real estate loans: Land    
Credit Risk Grades    
Total Gross Loans 9,088ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_RealEstateLandMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 7,605ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_RealEstateLandMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Pass | Other loans    
Credit Risk Grades    
Total Gross Loans 3,298ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_OtherLoansReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 3,834ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_OtherLoansReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Special Mention    
Credit Risk Grades    
Total Gross Loans 773ppbi_LoansReceivableGross
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember		 2,092ppbi_LoansReceivableGross
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
Special Mention | Business loans: Commercial and industrial    
Credit Risk Grades    
Total Gross Loans   12ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_CommercialAndIndustrialBusinessLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
Special Mention | Business loans: Commercial owner occupied    
Credit Risk Grades    
Total Gross Loans   1,217ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_CommercialOwnerOccupiedBusinessLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
Special Mention | Business loans: SBA    
Credit Risk Grades    
Total Gross Loans 272ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_SmallBusinessAdministrationLoansMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember		  
Special Mention | Real estate loans: Commercial non-owner occupied    
Credit Risk Grades    
Total Gross Loans   352ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_CommercialNonOwnerOccupiedRealEstateLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
Special Mention | Real estate loans: Multi-family    
Credit Risk Grades    
Total Gross Loans 501ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_MultiFamilyRealEstateLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember		 511ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_MultiFamilyRealEstateLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
Substandard    
Credit Risk Grades    
Total Gross Loans 15,529ppbi_LoansReceivableGross
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember		 20,035ppbi_LoansReceivableGross
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
Substandard | Business loans: Commercial and industrial    
Credit Risk Grades    
Total Gross Loans 1,828ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_CommercialAndIndustrialBusinessLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember		 2,776ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_CommercialAndIndustrialBusinessLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
Substandard | Business loans: Commercial owner occupied    
Credit Risk Grades    
Total Gross Loans 8,605ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_CommercialOwnerOccupiedBusinessLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember		 12,000ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_CommercialOwnerOccupiedBusinessLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
Substandard | Real estate loans: Commercial non-owner occupied    
Credit Risk Grades    
Total Gross Loans 3,939ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_CommercialNonOwnerOccupiedRealEstateLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember		 3,654ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_CommercialNonOwnerOccupiedRealEstateLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
Substandard | Real estate loans: Multi-family    
Credit Risk Grades    
Total Gross Loans 508ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_MultiFamilyRealEstateLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember		 517ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_MultiFamilyRealEstateLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
Substandard | Real estate loans: One-to-four family    
Credit Risk Grades    
Total Gross Loans 649ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_OneToFourFamilyRealEstateLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember		 1,083ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_OneToFourFamilyRealEstateLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
Substandard | Other loans    
Credit Risk Grades    
Total Gross Loans   $ 5ppbi_LoansReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_OtherLoansReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember