XML 42 R35.htm IDEA: XBRL DOCUMENT v3.25.3

New Accounting Standards - Additional Information (Details)	Sep. 30, 2025
Accounting Standards Update and Change in Accounting Principle [Abstract]
Minimum percentage of income tax payment net of refunds received	5.00%

X

- Definition

Minimum percentage of income tax payment net of refunds received

+ References

No definition available.

+ Details

Name:	pb_MinimumPercentageOfIncomeTaxPaymentNetOfRefundsReceived
Namespace Prefix:	pb_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration