Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000719220-21-000018-index-headers.html | 2021-02-26 21:43:22 | |
| 0000719220-21-000018-index.html | 2021-02-26 21:43:22 | |
| 0000719220-21-000018.txt | 2021-02-26 21:43:22 | |
 0000719220-21-000018-xbrl.zip | 982799 | 2021-02-26 21:43:22 |
| ex-21202010k.htm | 10882 | 2021-02-26 21:43:22 |
| ex-231202010k.htm | 4997 | 2021-02-26 21:43:22 |
| ex-311202010k.htm | 7757 | 2021-02-26 21:43:22 |
| ex-312202010k.htm | 7833 | 2021-02-26 21:43:22 |
| ex-32202010k.htm | 5990 | 2021-02-26 21:43:22 |
| FilingSummary.xml | 95751 | 2021-02-26 21:43:22 |
| Financial_Report.xlsx | 285384 | 2021-02-26 21:43:22 |
| MetaLinks.json | 1633603 | 2021-02-26 21:43:22 |
| R1.htm | 63107 | 2021-02-26 21:43:22 |
| R10.htm | 72368 | 2021-02-26 21:43:22 |
| R100.htm | 38348 | 2021-02-26 21:43:22 |
| R101.htm | 62177 | 2021-02-26 21:43:22 |
| R102.htm | 19439 | 2021-02-26 21:43:22 |
| R103.htm | 13555 | 2021-02-26 21:43:22 |
| R104.htm | 7353 | 2021-02-26 21:43:22 |
| R105.htm | 18380 | 2021-02-26 21:43:22 |
| R106.htm | 11094 | 2021-02-26 21:43:22 |
| R107.htm | 17463 | 2021-02-26 21:43:22 |
| R108.htm | 32225 | 2021-02-26 21:43:22 |
| R109.htm | 35385 | 2021-02-26 21:43:22 |
| R11.htm | 39840 | 2021-02-26 21:43:22 |
| R110.htm | 12560 | 2021-02-26 21:43:22 |
| R111.htm | 8997 | 2021-02-26 21:43:22 |
| R112.htm | 27545 | 2021-02-26 21:43:22 |
| R113.htm | 19519 | 2021-02-26 21:43:22 |
| R114.htm | 18619 | 2021-02-26 21:43:22 |
| R115.htm | 6332 | 2021-02-26 21:43:22 |
| R116.htm | 17055 | 2021-02-26 21:43:22 |
| R117.htm | 7863 | 2021-02-26 21:43:22 |
| R118.htm | 15368 | 2021-02-26 21:43:22 |
| R119.htm | 15504 | 2021-02-26 21:43:22 |
| R12.htm | 227868 | 2021-02-26 21:43:22 |
| R120.htm | 8776 | 2021-02-26 21:43:22 |
| R121.htm | 33669 | 2021-02-26 21:43:22 |
| R122.htm | 12136 | 2021-02-26 21:43:22 |
| R123.htm | 48365 | 2021-02-26 21:43:22 |
| R124.htm | 9186 | 2021-02-26 21:43:22 |
| R125.htm | 14282 | 2021-02-26 21:43:22 |
| R126.htm | 25251 | 2021-02-26 21:43:22 |
| R127.htm | 27123 | 2021-02-26 21:43:22 |
| R128.htm | 13977 | 2021-02-26 21:43:22 |
| R129.htm | 23010 | 2021-02-26 21:43:22 |
| R13.htm | 4715 | 2021-02-26 21:43:22 |
| R130.htm | 44450 | 2021-02-26 21:43:22 |
| R131.htm | 11971 | 2021-02-26 21:43:22 |
| R132.htm | 34506 | 2021-02-26 21:43:22 |
| R133.htm | 48311 | 2021-02-26 21:43:22 |
| R134.htm | 34927 | 2021-02-26 21:43:22 |
| R135.htm | 7584 | 2021-02-26 21:43:22 |
| R136.htm | 6766 | 2021-02-26 21:43:22 |
| R137.htm | 39942 | 2021-02-26 21:43:22 |
| R138.htm | 9592 | 2021-02-26 21:43:22 |
| R139.htm | 14217 | 2021-02-26 21:43:22 |
| R14.htm | 6487 | 2021-02-26 21:43:22 |
| R140.htm | 40212 | 2021-02-26 21:43:22 |
| R141.htm | 75033 | 2021-02-26 21:43:22 |
| R142.htm | 27402 | 2021-02-26 21:43:22 |
| R143.htm | 40134 | 2021-02-26 21:43:22 |
| R144.htm | 44772 | 2021-02-26 21:43:22 |
| R145.htm | 64251 | 2021-02-26 21:43:22 |
| R146.htm | 6607 | 2021-02-26 21:43:22 |
| R147.htm | 78578 | 2021-02-26 21:43:22 |
| R148.htm | 48897 | 2021-02-26 21:43:22 |
| R149.htm | 15596 | 2021-02-26 21:43:22 |
| R15.htm | 194889 | 2021-02-26 21:43:22 |
| R150.htm | 19133 | 2021-02-26 21:43:22 |
| R16.htm | 229132 | 2021-02-26 21:43:22 |
| R17.htm | 568250 | 2021-02-26 21:43:22 |
| R18.htm | 106626 | 2021-02-26 21:43:22 |
| R19.htm | 16368 | 2021-02-26 21:43:22 |
| R2.htm | 90613 | 2021-02-26 21:43:22 |
| R20.htm | 27220 | 2021-02-26 21:43:22 |
| R21.htm | 50676 | 2021-02-26 21:43:22 |
| R22.htm | 28939 | 2021-02-26 21:43:22 |
| R23.htm | 6674 | 2021-02-26 21:43:22 |
| R24.htm | 36456 | 2021-02-26 21:43:22 |
| R25.htm | 27081 | 2021-02-26 21:43:22 |
| R26.htm | 57006 | 2021-02-26 21:43:22 |
| R27.htm | 24521 | 2021-02-26 21:43:22 |
| R28.htm | 35503 | 2021-02-26 21:43:22 |
| R29.htm | 83819 | 2021-02-26 21:43:22 |
| R3.htm | 16871 | 2021-02-26 21:43:22 |
| R30.htm | 31974 | 2021-02-26 21:43:22 |
| R31.htm | 122351 | 2021-02-26 21:43:22 |
| R32.htm | 22879 | 2021-02-26 21:43:22 |
| R33.htm | 78856 | 2021-02-26 21:43:22 |
| R34.htm | 69519 | 2021-02-26 21:43:22 |
| R35.htm | 65841 | 2021-02-26 21:43:22 |
| R36.htm | 5631 | 2021-02-26 21:43:22 |
| R37.htm | 7255 | 2021-02-26 21:43:22 |
| R38.htm | 210100 | 2021-02-26 21:43:22 |
| R39.htm | 40840 | 2021-02-26 21:43:22 |
| R4.htm | 109399 | 2021-02-26 21:43:22 |
| R40.htm | 68034 | 2021-02-26 21:43:22 |
| R41.htm | 38739 | 2021-02-26 21:43:22 |
| R42.htm | 230868 | 2021-02-26 21:43:22 |
| R43.htm | 203235 | 2021-02-26 21:43:22 |
| R44.htm | 236688 | 2021-02-26 21:43:22 |
| R45.htm | 576291 | 2021-02-26 21:43:22 |
| R46.htm | 107856 | 2021-02-26 21:43:22 |
| R47.htm | 15239 | 2021-02-26 21:43:22 |
| R48.htm | 28732 | 2021-02-26 21:43:22 |
| R49.htm | 73674 | 2021-02-26 21:43:22 |
| R5.htm | 35641 | 2021-02-26 21:43:22 |
| R50.htm | 22784 | 2021-02-26 21:43:22 |
| R51.htm | 36414 | 2021-02-26 21:43:22 |
| R52.htm | 26692 | 2021-02-26 21:43:22 |
| R53.htm | 63297 | 2021-02-26 21:43:22 |
| R54.htm | 22075 | 2021-02-26 21:43:22 |
| R55.htm | 32674 | 2021-02-26 21:43:22 |
| R56.htm | 85114 | 2021-02-26 21:43:22 |
| R57.htm | 31258 | 2021-02-26 21:43:22 |
| R58.htm | 124877 | 2021-02-26 21:43:22 |
| R59.htm | 17065 | 2021-02-26 21:43:22 |
| R6.htm | 76945 | 2021-02-26 21:43:22 |
| R60.htm | 81024 | 2021-02-26 21:43:22 |
| R61.htm | 64802 | 2021-02-26 21:43:22 |
| R62.htm | 65891 | 2021-02-26 21:43:22 |
| R63.htm | 126539 | 2021-02-26 21:43:22 |
| R64.htm | 15622 | 2021-02-26 21:43:22 |
| R65.htm | 71906 | 2021-02-26 21:43:22 |
| R66.htm | 57811 | 2021-02-26 21:43:22 |
| R67.htm | 104107 | 2021-02-26 21:43:22 |
| R68.htm | 70020 | 2021-02-26 21:43:22 |
| R69.htm | 104172 | 2021-02-26 21:43:22 |
| R7.htm | 12491 | 2021-02-26 21:43:22 |
| R70.htm | 48632 | 2021-02-26 21:43:22 |
| R71.htm | 109304 | 2021-02-26 21:43:22 |
| R72.htm | 6157 | 2021-02-26 21:43:22 |
| R73.htm | 3874 | 2021-02-26 21:43:22 |
| R74.htm | 41296 | 2021-02-26 21:43:22 |
| R75.htm | 8885 | 2021-02-26 21:43:22 |
| R76.htm | 70148 | 2021-02-26 21:43:22 |
| R77.htm | 7425 | 2021-02-26 21:43:22 |
| R78.htm | 21003 | 2021-02-26 21:43:22 |
| R79.htm | 54496 | 2021-02-26 21:43:22 |
| R8.htm | 136024 | 2021-02-26 21:43:22 |
| R80.htm | 9414 | 2021-02-26 21:43:22 |
| R81.htm | 100028 | 2021-02-26 21:43:22 |
| R82.htm | 30543 | 2021-02-26 21:43:22 |
| R83.htm | 58951 | 2021-02-26 21:43:22 |
| R84.htm | 122736 | 2021-02-26 21:43:22 |
| R85.htm | 11944 | 2021-02-26 21:43:22 |
| R86.htm | 10093 | 2021-02-26 21:43:22 |
| R87.htm | 167069 | 2021-02-26 21:43:22 |
| R88.htm | 122899 | 2021-02-26 21:43:22 |
| R89.htm | 78648 | 2021-02-26 21:43:22 |
| R9.htm | 154168 | 2021-02-26 21:43:22 |
| R90.htm | 33590 | 2021-02-26 21:43:22 |
| R91.htm | 56696 | 2021-02-26 21:43:22 |
| R92.htm | 59194 | 2021-02-26 21:43:22 |
| R93.htm | 100597 | 2021-02-26 21:43:22 |
| R94.htm | 51007 | 2021-02-26 21:43:22 |
| R95.htm | 40023 | 2021-02-26 21:43:22 |
| R96.htm | 70954 | 2021-02-26 21:43:22 |
| R97.htm | 37635 | 2021-02-26 21:43:22 |
| R98.htm | 46461 | 2021-02-26 21:43:22 |
| R99.htm | 26344 | 2021-02-26 21:43:22 |
| report.css | 2768 | 2021-02-26 21:43:22 |
| Show.js | 1086 | 2021-02-26 21:43:22 |
| stba-20201231.htm | 7636369 | 2021-02-26 21:43:22 |
| stba-20201231.xsd | 143783 | 2021-02-26 21:43:22 |
| stba-20201231_cal.xml | 314850 | 2021-02-26 21:43:22 |
| stba-20201231_def.xml | 927416 | 2021-02-26 21:43:22 |
 stba-20201231_g1.jpg | 79347 | 2021-02-26 21:43:22 |
| stba-20201231_htm.xml | 7788715 | 2021-02-26 21:43:22 |
| stba-20201231_lab.xml | 1715897 | 2021-02-26 21:43:22 |
| stba-20201231_pre.xml | 1308634 | 2021-02-26 21:43:22 |