Benefit Plans (Details) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Benefit Plans
Employer's match of employees' contributions of the first 3% of eligible compensation (as a percent)	100.00%	100.00%	100.00%
Percentage of eligible compensation, matched 100% by employer		3.00%	3.00%	3.00%
Employer's match of employees' contributions of the next 2% of eligible compensation (as a percent)		50.00%	50.00%	50.00%
Percentage of eligible compensation, matched 50% by employer		2.00%	2.00%	2.00%
Contributions made	$ 540,000	$ 401,000	$ 260,000
Minimum
Benefit Plans
Employee contribution, as a percentage of compensation	1.00%
Maximum
Benefit Plans
Employee contribution, as a percentage of compensation	50.00%

Represents the annual employee contributions to the plan as a percentage of compensation.

No definition available.

Name:	ppbi_DefinedContributionPlanEmployeesContributionPercentageOfCompensation
Namespace Prefix:	ppbi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the first level of employees' contributions (percentage of compensation), which are matched by the employer.

+ References

No definition available.

+ Details

Name:	ppbi_DefinedContributionPlanEmployersMatchForEmployeesContributionLevelOne
Namespace Prefix:	ppbi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the second level of employees' contributions (percentage of compensation), which are matched by the employer.

+ References

No definition available.

+ Details

Name:	ppbi_DefinedContributionPlanEmployersMatchForEmployeesContributionLevelTwo
Namespace Prefix:	ppbi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the employer's matching contribution of the first level of employees' contributions.

+ References

No definition available.

+ Details

Name:	ppbi_DefinedContributionPlanEmployersMatchLevelOne
Namespace Prefix:	ppbi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the employer's matching contribution of the second level of employees' contributions.

+ References

No definition available.

+ Details

Name:	ppbi_DefinedContributionPlanEmployersMatchLevelTwo
Namespace Prefix:	ppbi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	ppbi_ScheduleOfDefinedContributionBenefitPlansDisclosureLineItems
Namespace Prefix:	ppbi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 70

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942

+ Details

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

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: