XML 60 R49.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Nature of Operations and Summary of Significant Accounting and Reporting Policies - Additional Information (Details) | 12 Months Ended
--- | ---
Dec. 31, 2024 USD ($) Location Segment Classifications shares | Dec. 31, 2023 shares | Dec. 31, 2022 shares
Summary of Accounting and Financial Policies [Line Items] |  |  |
Number of bank operating locations | 283 |  |
Number of Reportable Segments | Segment | 1 |  |
Number of Investment Securities Classifications | Classifications | 2 |  |
Minimum Percentage Likelihood of Tax Benefit to be Realized Upon Final Settlement | 50.00% |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares | 0 | 0 | 0
Number of options outstanding | shares | 0 |  |
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration] | srt:ChiefExecutiveOfficerMember |  |
Minimum [Member] |  |  |
Summary of Accounting and Financial Policies [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 1 year |  |
Finite-lived intangible asset, useful life | 10 years |  |
Maximum [Member] |  |  |
Summary of Accounting and Financial Policies [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 39 years |  |
Finite-lived intangible asset, useful life | 15 years |  |
Warehouse Purchase Program [Member] |  |  |
Summary of Accounting and Financial Policies [Line Items] |  |  |
Allowance for loan losses | $ | $ 0 |  |
Houston [Member] |  |  |
Summary of Accounting and Financial Policies [Line Items] |  |  |
Number of bank operating locations | 65 |  |
South Texas [Member] |  |  |
Summary of Accounting and Financial Policies [Line Items] |  |  |
Number of bank operating locations | 30 |  |
Dallas, Texas [Member] |  |  |
Summary of Accounting and Financial Policies [Line Items] |  |  |
Number of bank operating locations | 62 |  |
East Texas [Member] |  |  |
Summary of Accounting and Financial Policies [Line Items] |  |  |
Number of bank operating locations | 22 |  |
Central Texas [Member] |  |  |
Summary of Accounting and Financial Policies [Line Items] |  |  |
Number of bank operating locations | 31 |  |
West Texas [Member] |  |  |
Summary of Accounting and Financial Policies [Line Items] |  |  |
Number of bank operating locations | 44 |  |
Bryan/College Station [Member] |  |  |
Summary of Accounting and Financial Policies [Line Items] |  |  |
Number of bank operating locations | 15 |  |
Central Oklahoma [Member] |  |  |
Summary of Accounting and Financial Policies [Line Items] |  |  |
Number of bank operating locations | 6 |  |
Tulsa, Oklahoma [Member] |  |  |
Summary of Accounting and Financial Policies [Line Items] |  |  |
Number of bank operating locations | 8 |  |

X
- Definition Percentage of tax benefit that is more than likely to be realized upon ultimate settlement with the related tax authority. + References No definition available. + Details
Name: | pb_MinimumPercentageLikelihoodOfTaxBenefitToBeRealizedUponFinalSettlement
Namespace Prefix: | pb_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of bank operating locations. + References No definition available. + Details
Name: | pb_NumberOfBankOperatingLocations
Namespace Prefix: | pb_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of classifications of investment securities held in a portfolio by an entity. + References No definition available. + Details
Name: | pb_NumberOfInvestmentSecuritiesClassifications
Namespace Prefix: | pb_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Summary of accounting and financial policies. + References No definition available. + Details
Name: | pb_SummaryOfAccountingAndFinancialPoliciesLineItems
Namespace Prefix: | pb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The reserve to cover probable credit losses related to specifically identified fixed maturity real estate loans as well as probable credit losses inherent in the remainder of that loan portfolio. + References No definition available. + Details
Name: | us-gaap_AllowanceForLoanAndLeaseLossesRealEstate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 47 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-47 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 54 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-54 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-18 + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition Indicates title and position of individual or name of group identified as chief operating decision maker (CODM) for segment reporting. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 54 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-54 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 47 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-47 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-21 + Details
Name: | us-gaap_SegmentReportingCodmIndividualTitleAndPositionOrGroupOrCommitteeNameExtensibleEnumeration
Namespace Prefix: | us-gaap_
Data Type: | enum2:enumerationSetItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=pb_WarehousePurchaseProgramLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=pb_HoustonMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=pb_SouthTexasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=pb_DallasTexasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=pb_EastTexasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=pb_CentralTexasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=pb_WestTexasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=pb_BryanCollegeStationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=pb_CentralOklahomaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=pb_TulsaOklahomaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |