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Financial Instruments with Off-Balance Sheet Risk (Details) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Financial Instruments with Off-Balance Sheet Risk    
Financial instruments with off-balance sheet risk $ 355,024,000us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability $ 337,181,000us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability
Undisbursed loans and unused lines of credit    
Financial Instruments with Off-Balance Sheet Risk    
Allowance for credit losses 397,000us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_FinancialInstrumentAxis
= ppbi_UndisbursedLoanFundsAndUnusedLinesOfCreditMember		 341,000us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_FinancialInstrumentAxis
= ppbi_UndisbursedLoanFundsAndUnusedLinesOfCreditMember
Commitments to extend credit    
Financial Instruments with Off-Balance Sheet Risk    
Financial instruments with off-balance sheet risk 355,000,000us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommitmentsToExtendCreditMember		 337,200,000us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommitmentsToExtendCreditMember
Commitments to extend credit | Business loans: Warehouse facilities    
Financial Instruments with Off-Balance Sheet Risk    
Financial instruments with off-balance sheet risk   105,300,000us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_WarehouseFacilitiesBusinessLoanMember
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommitmentsToExtendCreditMember
Commitments to extend credit | Business loans: Commercial and industrial    
Financial Instruments with Off-Balance Sheet Risk    
Financial instruments with off-balance sheet risk   $ 140,100,000us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ppbi_CommercialAndIndustrialBusinessLoanMember
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommitmentsToExtendCreditMember