XML 49 R33.htm IDEA: XBRL DOCUMENT
v3.22.1

Off-Balance-Sheet Arrangements, Commitments and Contingencies (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2022
Commitments and Contingencies Disclosure [Abstract] |
Off-balance-sheet, Allowance for off-balance-sheet credit exposures | Allowance for off-balance-sheet credit exposures were as follows (in thousands):
| Three Months Ended March 31, |  |
| 2022 |  | 2021 |  |  |  |
Balance at beginning of period | $ | 2,384 |  |  | $ | 6,386 |  |  |  |  |
Provision for (reversal of) off-balance-sheet credit exposures | 28 |  |  | (2,770) |  |  |  |  |
Balance at end of period | $ | 2,412 |  |  | $ | 3,616 |  |  |  |  |
Schedule of unused commitments | Financial instruments with off-balance-sheet risk were as follows (in thousands):
| March 31, 2022 |  | December 31, 2021
Commitments to extend credit | $ | 1,100,541 |  |  | $ | 1,053,002 |
Standby letters of credit | 9,386 |  |  | 12,708 |
Total | $ | 1,109,927 |  |  | $ | 1,065,710 |

X
- Definition Off-balance-sheet, Allowance for off-balance-sheet credit exposures [Table Text Block] + References No definition available. + Details
Name: | sbsi_OffbalancesheetAllowanceforoffbalancesheetcreditexposuresTableTextBlock
Namespace Prefix: | sbsi_
Data Type: | dtr-types: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

X
- Definition Tabular disclosure of the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined) which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13467-108611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611 + Details
Name: | us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration