Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000705432-21-000013-index-headers.html | 2021-02-26 13:37:27 | |
| 0000705432-21-000013-index.html | 2021-02-26 13:37:27 | |
| 0000705432-21-000013.txt | 2021-02-26 13:37:27 | |
 0000705432-21-000013-xbrl.zip | 938848 | 2021-02-26 13:37:27 |
| FilingSummary.xml | 73938 | 2021-02-26 13:37:27 |
| Financial_Report.xlsx | 242757 | 2021-02-26 13:37:27 |
| MetaLinks.json | 1517703 | 2021-02-26 13:37:27 |
| R1.htm | 63331 | 2021-02-26 13:37:27 |
| R10.htm | 21817 | 2021-02-26 13:37:27 |
| R100.htm | 52206 | 2021-02-26 13:37:27 |
| R101.htm | 4449 | 2021-02-26 13:37:27 |
| R102.htm | 14626 | 2021-02-26 13:37:27 |
| R103.htm | 6348 | 2021-02-26 13:37:27 |
| R104.htm | 5461 | 2021-02-26 13:37:27 |
| R105.htm | 10961 | 2021-02-26 13:37:27 |
| R106.htm | 7011 | 2021-02-26 13:37:27 |
| R107.htm | 24799 | 2021-02-26 13:37:27 |
| R108.htm | 5210 | 2021-02-26 13:37:27 |
| R109.htm | 16555 | 2021-02-26 13:37:27 |
| R11.htm | 125742 | 2021-02-26 13:37:27 |
| R110.htm | 10436 | 2021-02-26 13:37:27 |
| R111.htm | 9392 | 2021-02-26 13:37:27 |
| R112.htm | 9478 | 2021-02-26 13:37:27 |
| R113.htm | 6943 | 2021-02-26 13:37:27 |
| R114.htm | 68034 | 2021-02-26 13:37:27 |
| R115.htm | 12002 | 2021-02-26 13:37:27 |
| R116.htm | 46903 | 2021-02-26 13:37:27 |
| R117.htm | 67416 | 2021-02-26 13:37:27 |
| R118.htm | 67419 | 2021-02-26 13:37:27 |
| R12.htm | 189249 | 2021-02-26 13:37:27 |
| R13.htm | 436955 | 2021-02-26 13:37:27 |
| R14.htm | 14223 | 2021-02-26 13:37:27 |
| R15.htm | 42270 | 2021-02-26 13:37:27 |
| R16.htm | 47602 | 2021-02-26 13:37:27 |
| R17.htm | 39353 | 2021-02-26 13:37:27 |
| R18.htm | 424898 | 2021-02-26 13:37:27 |
| R19.htm | 66917 | 2021-02-26 13:37:27 |
| R2.htm | 114930 | 2021-02-26 13:37:27 |
| R20.htm | 187644 | 2021-02-26 13:37:27 |
| R21.htm | 86243 | 2021-02-26 13:37:27 |
| R22.htm | 6143 | 2021-02-26 13:37:27 |
| R23.htm | 81437 | 2021-02-26 13:37:27 |
| R24.htm | 94745 | 2021-02-26 13:37:27 |
| R25.htm | 26823 | 2021-02-26 13:37:27 |
| R26.htm | 6110 | 2021-02-26 13:37:27 |
| R27.htm | 88912 | 2021-02-26 13:37:27 |
| R28.htm | 80704 | 2021-02-26 13:37:27 |
| R29.htm | 173989 | 2021-02-26 13:37:27 |
| R3.htm | 18623 | 2021-02-26 13:37:27 |
| R30.htm | 25033 | 2021-02-26 13:37:27 |
| R31.htm | 21151 | 2021-02-26 13:37:27 |
| R32.htm | 126994 | 2021-02-26 13:37:27 |
| R33.htm | 186175 | 2021-02-26 13:37:27 |
| R34.htm | 423611 | 2021-02-26 13:37:27 |
| R35.htm | 13099 | 2021-02-26 13:37:27 |
| R36.htm | 40695 | 2021-02-26 13:37:27 |
| R37.htm | 44571 | 2021-02-26 13:37:27 |
| R38.htm | 42140 | 2021-02-26 13:37:27 |
| R39.htm | 424026 | 2021-02-26 13:37:27 |
| R4.htm | 114245 | 2021-02-26 13:37:27 |
| R40.htm | 62657 | 2021-02-26 13:37:27 |
| R41.htm | 168213 | 2021-02-26 13:37:27 |
| R42.htm | 81685 | 2021-02-26 13:37:27 |
| R43.htm | 83683 | 2021-02-26 13:37:27 |
| R44.htm | 51816 | 2021-02-26 13:37:27 |
| R45.htm | 23260 | 2021-02-26 13:37:27 |
| R46.htm | 90784 | 2021-02-26 13:37:27 |
| R47.htm | 81037 | 2021-02-26 13:37:27 |
| R48.htm | 50785 | 2021-02-26 13:37:27 |
| R49.htm | 32944 | 2021-02-26 13:37:27 |
| R5.htm | 60789 | 2021-02-26 13:37:27 |
| R50.htm | 49809 | 2021-02-26 13:37:27 |
| R51.htm | 41913 | 2021-02-26 13:37:27 |
| R52.htm | 83401 | 2021-02-26 13:37:27 |
| R53.htm | 70362 | 2021-02-26 13:37:27 |
| R54.htm | 103930 | 2021-02-26 13:37:27 |
| R55.htm | 61074 | 2021-02-26 13:37:27 |
| R56.htm | 15099 | 2021-02-26 13:37:27 |
| R57.htm | 80877 | 2021-02-26 13:37:27 |
| R58.htm | 9234 | 2021-02-26 13:37:27 |
| R59.htm | 82523 | 2021-02-26 13:37:27 |
| R6.htm | 56008 | 2021-02-26 13:37:27 |
| R60.htm | 29320 | 2021-02-26 13:37:27 |
| R61.htm | 157442 | 2021-02-26 13:37:27 |
| R62.htm | 61792 | 2021-02-26 13:37:27 |
| R63.htm | 35257 | 2021-02-26 13:37:27 |
| R64.htm | 39842 | 2021-02-26 13:37:27 |
| R65.htm | 70506 | 2021-02-26 13:37:27 |
| R66.htm | 45510 | 2021-02-26 13:37:27 |
| R67.htm | 20731 | 2021-02-26 13:37:27 |
| R68.htm | 30803 | 2021-02-26 13:37:27 |
| R69.htm | 16639 | 2021-02-26 13:37:27 |
| R7.htm | 12358 | 2021-02-26 13:37:27 |
| R70.htm | 21770 | 2021-02-26 13:37:27 |
| R71.htm | 22280 | 2021-02-26 13:37:27 |
| R72.htm | 21831 | 2021-02-26 13:37:27 |
| R73.htm | 63490 | 2021-02-26 13:37:27 |
| R74.htm | 44354 | 2021-02-26 13:37:27 |
| R75.htm | 55468 | 2021-02-26 13:37:27 |
| R76.htm | 179863 | 2021-02-26 13:37:27 |
| R77.htm | 67527 | 2021-02-26 13:37:27 |
| R78.htm | 41453 | 2021-02-26 13:37:27 |
| R79.htm | 35724 | 2021-02-26 13:37:27 |
| R8.htm | 141865 | 2021-02-26 13:37:27 |
| R80.htm | 23827 | 2021-02-26 13:37:27 |
| R81.htm | 40631 | 2021-02-26 13:37:27 |
| R82.htm | 29302 | 2021-02-26 13:37:27 |
| R83.htm | 78116 | 2021-02-26 13:37:27 |
| R84.htm | 24873 | 2021-02-26 13:37:27 |
| R85.htm | 14709 | 2021-02-26 13:37:27 |
| R86.htm | 16795 | 2021-02-26 13:37:27 |
| R87.htm | 67418 | 2021-02-26 13:37:27 |
| R88.htm | 48237 | 2021-02-26 13:37:27 |
| R89.htm | 9554 | 2021-02-26 13:37:27 |
| R9.htm | 95082 | 2021-02-26 13:37:27 |
| R90.htm | 48981 | 2021-02-26 13:37:27 |
| R91.htm | 22139 | 2021-02-26 13:37:27 |
| R92.htm | 92819 | 2021-02-26 13:37:27 |
| R93.htm | 59851 | 2021-02-26 13:37:27 |
| R94.htm | 7930 | 2021-02-26 13:37:27 |
| R95.htm | 79680 | 2021-02-26 13:37:27 |
| R96.htm | 5679 | 2021-02-26 13:37:27 |
| R97.htm | 12051 | 2021-02-26 13:37:27 |
| R98.htm | 14818 | 2021-02-26 13:37:27 |
| R99.htm | 39673 | 2021-02-26 13:37:27 |
| report.css | 2768 | 2021-02-26 13:37:27 |
| sbsi-20201231.htm | 6865168 | 2021-02-26 13:37:27 |
| sbsi-20201231.xsd | 118509 | 2021-02-26 13:37:27 |
| sbsi-20201231_cal.xml | 260587 | 2021-02-26 13:37:27 |
| sbsi-20201231_def.xml | 837563 | 2021-02-26 13:37:27 |
 sbsi-20201231_g1.jpg | 44935 | 2021-02-26 13:37:27 |
| sbsi-20201231_htm.xml | 7149197 | 2021-02-26 13:37:27 |
| sbsi-20201231_lab.xml | 1675438 | 2021-02-26 13:37:27 |
| sbsi-20201231_pre.xml | 1196576 | 2021-02-26 13:37:27 |
| sbsi_123120ex104.htm | 45250 | 2021-02-26 13:37:27 |
| sbsi_123120ex105.htm | 10770 | 2021-02-26 13:37:27 |
| sbsi_123120ex109.htm | 87266 | 2021-02-26 13:37:27 |
| sbsi_123120ex21.htm | 4450 | 2021-02-26 13:37:27 |
| sbsi_123120ex231.htm | 4836 | 2021-02-26 13:37:27 |
| sbsi_123120ex311.htm | 11589 | 2021-02-26 13:37:27 |
| sbsi_123120ex312.htm | 11139 | 2021-02-26 13:37:27 |
| sbsi_123120ex32.htm | 7417 | 2021-02-26 13:37:27 |
| Show.js | 1086 | 2021-02-26 13:37:27 |