XML 65 R54.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Acquisitions (Acquired Loans) - Additional Information (Details) $ in Millions | Dec. 31, 2024 USD ($)
--- | ---
Non PCD and PCD Loans [Member] |
Business Acquisition [Line Items] |
Outstanding discount on loans | $ 35.2

X
- Definition Outstanding discount on loans 1. + References No definition available. + Details
Name: | pb_OutstandingDiscountOnLoans
Namespace Prefix: | pb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-5 + Details
Name: | us-gaap_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=pb_NonPCDAndPCDLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |