Loans Held for Investment - Schedule of Nonaccrual Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Nonaccrual [Line Items]
Collateral dependent loans, balance	$ 17,093	$ 12,222
Collateral dependent loans, ACL	0	0
Non-collateral dependent loans, balance	10,938	12,595
Non-collateral dependent loans, ACL	0	0
Total Nonaccrual Loans	28,031	24,817
Nonaccrual Loans with No ACL	28,031	24,817
Investor loans secured by real estate
Financing Receivable, Nonaccrual [Line Items]
Collateral dependent loans, balance	15,832	1,617
Collateral dependent loans, ACL	0	0
Non-collateral dependent loans, balance	0	0
Non-collateral dependent loans, ACL	0	0
Total Nonaccrual Loans	15,832	1,617
Nonaccrual Loans with No ACL	15,832	1,617
Investor loans secured by real estate \| CRE non-owner-occupied
Financing Receivable, Nonaccrual [Line Items]
Collateral dependent loans, balance	15,423	412
Collateral dependent loans, ACL	0	0
Non-collateral dependent loans, balance	0	0
Non-collateral dependent loans, ACL	0	0
Total Nonaccrual Loans	15,423	412
Nonaccrual Loans with No ACL	15,423	412
Investor loans secured by real estate \| SBA secured by real estate
Financing Receivable, Nonaccrual [Line Items]
Collateral dependent loans, balance	409	1,205
Collateral dependent loans, ACL	0	0
Non-collateral dependent loans, balance	0	0
Non-collateral dependent loans, ACL	0	0
Total Nonaccrual Loans	409	1,205
Nonaccrual Loans with No ACL	409	1,205
Business loans secured by real estate
Financing Receivable, Nonaccrual [Line Items]
Collateral dependent loans, balance		8,666
Collateral dependent loans, ACL		0
Non-collateral dependent loans, balance		0
Non-collateral dependent loans, ACL		0
Total Nonaccrual Loans		8,666
Nonaccrual Loans with No ACL		8,666
Business loans secured by real estate \| CRE owner-occupied
Financing Receivable, Nonaccrual [Line Items]
Collateral dependent loans, balance		8,666
Collateral dependent loans, ACL		0
Non-collateral dependent loans, balance		0
Non-collateral dependent loans, ACL		0
Total Nonaccrual Loans		8,666
Nonaccrual Loans with No ACL		8,666
Commercial loans
Financing Receivable, Nonaccrual [Line Items]
Collateral dependent loans, balance	1,261	1,939
Collateral dependent loans, ACL	0	0
Non-collateral dependent loans, balance	10,938	12,595
Non-collateral dependent loans, ACL	0	0
Total Nonaccrual Loans	12,199	14,534
Nonaccrual Loans with No ACL	12,199	14,534
Commercial loans \| Commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Collateral dependent loans, balance	1,241	1,381
Collateral dependent loans, ACL	0	0
Non-collateral dependent loans, balance	10,938	12,595
Non-collateral dependent loans, ACL	0	0
Total Nonaccrual Loans	12,179	13,976
Nonaccrual Loans with No ACL	12,179	13,976
Commercial loans \| SBA non-real estate secured
Financing Receivable, Nonaccrual [Line Items]
Collateral dependent loans, balance	20	558
Collateral dependent loans, ACL	0	0
Non-collateral dependent loans, balance	0	0
Non-collateral dependent loans, ACL	0	0
Total Nonaccrual Loans	20	558
Nonaccrual Loans with No ACL	$ 20	$ 558

Financing Receivable, Collateral Dependent, Nonaccrual

No definition available.

Name:	ppbi_FinancingReceivableCollateralDependentNonaccrual
Namespace Prefix:	ppbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Financing Receivable, Collateral Dependent, Nonaccrual, Allowance for Credit Loss

+ References

No definition available.

+ Details

Name:	ppbi_FinancingReceivableCollateralDependentNonaccrualAllowanceforCreditLoss
Namespace Prefix:	ppbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Financing Receivable, Non-collateral Dependent, Nonaccrual

+ References

No definition available.

+ Details

Name:	ppbi_FinancingReceivableNonCollateralDependentNonaccrual
Namespace Prefix:	ppbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Financing Receivable, Non-collateral Dependent, Nonaccrual, Allowance for Credit Loss

+ References

No definition available.

+ Details

Name:	ppbi_FinancingReceivableNonCollateralDependentNonaccrualAllowanceForCreditLoss
Namespace Prefix:	ppbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amortized cost of financing receivable on nonaccrual status with no allowance for credit loss. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-16

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-16

+ Details

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

- Definition

Amortized cost of financing receivable on nonaccrual status. Excludes net investment in lease.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph a
-Subparagraph (3)
-Publisher SEC

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph a
-Subparagraph (2)
-Publisher SEC

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-16

+ Details

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

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=ppbi_InvestorLoansSecuredbyRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=ppbi_BusinessLoansSecuredbyRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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