XML 42 R26.htm IDEA: XBRL DOCUMENT
v3.25.1

Commitments and Contingencies (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2025
Commitments and Contingencies Disclosure [Abstract] |
Schedule of Commitments and Letters of Credit | The following table sets forth our commitments and letters of credit as of the dates presented:
(dollars in thousands) | March 31, 2025 |  | December 31, 2024
Commitments to extend credit |  | $ | 2,398,243 |  |  |  | $ | 2,382,847 |
Standby letters of credit |  | 66,387 |  |  |  | 69,558 |
Total |  | $ | 2,464,630 |  |  |  | $ | 2,452,405 |

X
- Definition Commitments and Letters of Credit [Table Text Block] + References No definition available. + Details
Name: | stba_CommitmentsAndLettersOfCreditTableTextBlock
Namespace Prefix: | stba_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration