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v3.24.0.1

Retirement Plans - Safe Harbor plan (Details) | 12 Months Ended
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Dec. 31, 2023
Employees' savings plan |
Matching contribution by the company (as a percent) | 100.00%
Percentage of employees matching contribution for first eligible compensation | 4.00%
Minimum |
Employees' savings plan |
Age of employees to be eligible to participate in the defined contribution plan | 18 years
Percentage of eligible compensation that participants may elect to contribute | 1.00%
Maximum |
Employees' savings plan |
Percentage of eligible compensation that participants may elect to contribute | 50.00%

X
- Definition Represents the age of employees to be eligible to participate in the defined contribution plan. + References No definition available. + Details
Name: | ssb_DefinedContributionPlanAgeOfEmployeesCovered
Namespace Prefix: | ssb_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents employee contributions to a defined contribution pension plan as a percentage of eligible compensation. + References No definition available. + Details
Name: | ssb_DefinedContributionPlanEmployeeContributionAsPercentageOfEligibleCompensation
Namespace Prefix: | ssb_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percentage of the employee contribution for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
Name: | ssb_DefinedContributionPlanEmployerContributionPercent
Namespace Prefix: | ssb_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of first eligible compensation for employer matches of the employee's percentage contribution matched. + References No definition available. + Details
Name: | ssb_DefinedContributionPlanEmployerMatchingContributionFirstEligibleCompensationPercent
Namespace Prefix: | ssb_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |