XML 113 R100.htm IDEA: XBRL DOCUMENT
v3.24.0.1

INCOME TAXES Narrative (Details) - USD ($) | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Narrative [Abstract] |  |
Deferred tax asset valuation allowance | $ 0 | $ 0

X
- Definition Narrative [Abstract] + References No definition available. + Details
Name: | sbsi_NarrativeAbstract
Namespace Prefix: | sbsi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-2 + Details
Name: | us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant