XML 80 R69.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Loans and Allowance for Credit Losses - Nonperforming Assets (Parenthetical) (Details) - USD ($) | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |  |
Loans held for investment |  | $ 21,057,616,000 |  | $ 20,352,559,000 |  |
Nonperforming Financial Loans [Member] |  |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |  |
Loans held for investment |  | 75,836,000 |  | 70,883,000 | $ 25,531,000 |
Nonperforming Financial Loans [Member] | Finance Receivable Nonaccrual Status [Member] |  |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |  |
Loans held for investment | [1],[3] | 73,647,000 | [2] | 68,688,000 | 19,614,000 | [2]
Troubled Debt Restructuring [Member] | Nonperforming Financial Loans [Member] | Finance Receivable Nonaccrual Status [Member] |  |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |  |
Loans held for investment |  |  |  |  | 4,600,000 |
Troubled Debt Restructuring [Member] | Nonperforming Financial Loans [Member] | Finance Receivable Nonaccrual Status [Member] | Warehouse Purchase Program [Member] |  |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |  |
Loans held for investment |  | $ 0 |  | $ 0 | $ 0 |
[1] | ASU 2022-02 became effective for the Company on January 1, 2023.
[2] | Includes troubled debt restructurings of $4.6 million for the year ended December 31, 2022.
[3] | There were no nonperforming Warehouse Purchase Program loans or Warehouse Purchase Program lines of credit for the periods presented.

X
- Definition Loans and lease receivable net of deferred income. + References No definition available. + Details
Name: | pb_LoansAndLeaseReceivableNetOfDeferredIncome
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
- Details
Name: | us-gaap_FinancialInstrumentPerformanceStatusAxis=us-gaap_NonperformingFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=pb_TroubledDebtRestructuringMember
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: |