XML 49 R42.htm IDEA: XBRL DOCUMENT
v3.24.3

Loans and Allowance for Credit Losses - Aging Analysis of Past Due Loans (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | $ 22,199,058 | $ 21,002,310
Nonaccrual loans |  | 83,969 | 68,688
Total loans |  | 22,380,852 | 21,180,538
Financing Receivables, 30 to 89 Days Past Due [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 97,805 | 107,345
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 20 | 2,195
Financing Receivables Past Due Loans [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 97,825 | 109,540
Warehouse Purchase Program Loans [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 1,228,706 | 822,245
Total loans |  | 1,228,706 | 822,245
Agriculture [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 1,015,336 | 806,011
Nonaccrual loans |  | 2,686 | 1,460
Total loans |  | 1,033,224 | 816,043
Agriculture [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 15,202 | 8,572
Agriculture [Member] | Financing Receivables Past Due Loans [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 15,202 | 8,572
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 2,801,720 | 3,038,559
Nonaccrual loans |  | 1,848 | 14,770
Total loans |  | 2,814,521 | 3,076,591
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 10,953 | 21,627
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 0 | 1,635
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] | Financing Receivables Past Due Loans [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 10,953 | 23,262
Real Estate [Member] | Agriculture [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans |  | 1,033,224 |
Real Estate [Member] | 1-4 Family Residential (Includes Home Equity) [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing | [1] | 8,398,891 | 8,103,904
Nonaccrual loans | [1] | 34,611 | 25,694
Total loans | [1] | 8,477,534 | 8,168,078
Real Estate [Member] | 1-4 Family Residential (Includes Home Equity) [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing | [1] | 44,032 | 38,350
Real Estate [Member] | 1-4 Family Residential (Includes Home Equity) [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing | [1] |  | 130
Real Estate [Member] | 1-4 Family Residential (Includes Home Equity) [Member] | Financing Receivables Past Due Loans [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing | [1] | 44,032 | 38,480
Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 5,830,324 | 5,620,775
Nonaccrual loans |  | 31,685 | 18,662
Total loans |  | 5,869,687 | 5,662,948
Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 7,678 | 23,511
Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member] | Financing Receivables Past Due Loans [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 7,678 | 23,511
Commercial and Industrial [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 2,514,022 | 2,281,762
Nonaccrual loans |  | 13,080 | 8,066
Total loans |  | 2,543,632 | 2,305,040
Commercial and Industrial [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 16,530 | 14,782
Commercial and Industrial [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 0 | 430
Commercial and Industrial [Member] | Financing Receivables Past Due Loans [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 16,530 | 15,212
Consumer and Other [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 410,059 | 329,054
Nonaccrual loans |  | 59 | 36
Total loans |  | 413,548 | 329,593
Consumer and Other [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 3,410 | 503
Consumer and Other [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 20 |
Consumer and Other [Member] | Financing Receivables Past Due Loans [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | $ 3,430 | $ 503
[1] | Includes $6.1 million and $5.7 million of residential mortgage loans held for sale at September 30, 2024 and December 31, 2023, respectively.

X
- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References No definition available. + Details
Name: | pb_LoansAndLeasesReceivableNetOfDeferredIncomeAndLoanReceivableHeldForSaleAmount
Namespace Prefix: | pb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- 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/2009/role/commonPracticeRef -Topic 310 -SubTopic 20 -Name Accounting Standards Codification -Section 40 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481628/310-20-40-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481990/310-10-45-2 + Details
Name: | us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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

X
- Definition Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481990/310-10-45-13 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-7A Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 29 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-29 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph a -Subparagraph (1) -Publisher SEC Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph a -Subparagraph (2) -Publisher SEC Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1404 -Paragraph a -Publisher SEC Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 80 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-80 Reference 8: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-79 Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-14 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-5 + Details
Name: | us-gaap_NotesReceivableGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=pb_FinancingReceivables30To89DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=pb_AgricultureAndAgricultureRealEstateIncludesFarmlandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_RealEstateSectorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=pb_ConstructionLandDevelopmentAndOtherLandLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=pb_FamilyResidential14IncludesHomeEquityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=pb_CommercialRealEstateIncludesMultifamilyResidentialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_CommercialAndIndustrialSectorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=pb_ConsumerAndOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |