XML 70 R59.htm IDEA: XBRL DOCUMENT
v3.24.3

Investment Securities - Net losses on trading securities (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Investment Securities |  |  |  |
Net gains (losses) on sales transaction | $ 533 | $ (76) | $ 757 | $ (116)
Net mark to mark (losses) gains | (167) | 176 | (478) | (25)
Net gains (losses) on trading securities | $ 366 | $ 100 | $ 279 | $ (141)

X
- Definition Amount of gain losses on mark to market debt securities trading. + References No definition available. + Details
Name: | ssb_DebtSecuritiesTradingGainLossOnMarkToMarketSecurities
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of gain losses on sale of debt securities trading. + References No definition available. + Details
Name: | ssb_DebtSecuritiesTradingGainLossOnSaleOfSecurities
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in net income (trading). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(7)(c)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-14 + Details
Name: | us-gaap_DebtSecuritiesTradingRealizedGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration