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Regulatory Matters (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Jan. 01, 2020 | Jan. 01, 2019
Regulatory Matters |  |  |  |  |  |  |
Capital conversion buffer common equity Tier 1 of risk-weighted assets (as a percent) |  |  |  |  |  |  | 2.50%
Common equity Tier 1 to risk-weighted assets |  |  |  |  |  |  |
Actual, Capital Amount |  | $ 4,159,187 | $ 3,788,106 |  |  |  |
Actual, Ratio (as a percent) |  | 0.1175% | 0.1096% |  |  |  |
Required to be considered well capitalized, Capital Amount |  | $ 2,300,003 | $ 2,247,530 |  |  |  |
Required to be considered well capitalized, Ratio (as a percent) |  | 0.065% | 0.065% |  |  |  |
Tier One Risk Based Capital to Risk Weighted Assets [Abstract] |  |  |  |  |  |  |
Actual, Capital Amount |  | $ 4,159,187 | $ 3,788,106 |  |  |  |
Actual, Ratio (as a percent) |  | 0.1175 | 0.1096 |  |  |  |
Leverage ratio (as a percent) |  | 0.0942 | 0.0872 |  |  |  |
Tier One Risk Based Capital Required to be Well Capitalized |  | $ 2,830,773 | $ 2,766,190 |  |  |  |
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets (as a percent) |  | 0.0800 | 0.0800 |  |  |  |
Total capital to risk-weighted assets |  |  |  |  |  |  |
Actual, Capital Amount |  | $ 4,983,012 | $ 4,485,397 |  |  |  |
Capital to Risk Weighted Assets (as a percent) |  | 0.1408 | 0.1297 |  |  |  |
Required to be considered well capitalized, Capital Amount |  | $ 3,538,466 | $ 3,457,738 |  |  |  |
Required to be considered well capitalized, Ratio (as a percent) |  | 0.1000 | 0.1000 |  |  |  |
Tier One Leverage Capital to Average Assets [Abstract] |  |  |  |  |  |  |
Tier One Leverage Capital |  | $ 4,159,187 | $ 3,788,106 |  |  |  |
Tier One Leverage Capital to Average Assets (as a percent) |  | 0.0942 | 0.0872 |  |  |  |
Tier One Leverage Capital Required to be Well Capitalized |  | $ 2,206,619 | $ 2,171,239 |  |  |  |
Tier One Leverage Capital Required to be Well Capitalized to Average Assets (as a percent) |  | 0.0500 | 0.0500 |  |  |  |
Depreciation, Depletion and Amortization, Other Than Amortization of Debt Discount (Premium) |  | $ 58,826 | $ 64,591 | $ 63,137 |  |  |
Additional allowance for credit losses for loans |  | 456,573 | 356,444 | $ 301,807 | $ 457,309 |  |
Deferred tax assets |  | 164,354 | 177,801 |  |  |  |
Retained earnings |  | 1,685,166 | 1,347,042 |  |  |  |
Phasing out percentage | 50.00% |  |  |  |  |  |
Fully Phased-In |  |  |  |  |  |  |
Common equity Tier 1 to risk-weighted assets |  |  |  |  |  |  |
Minimum capital required, Capital Amount |  | $ 2,476,926 | $ 2,420,417 |  |  |  |
Minimum capital required, Ratio (as a percent) |  | 0.07% | 0.07% |  |  |  |
Tier One Risk Based Capital to Risk Weighted Assets [Abstract] |  |  |  |  |  |  |
Banking Regulation, Tier 1 Risk-Based Capital, Capital Adequacy With Buffer, Minimum |  | $ 3,007,696 | $ 2,939,077 |  |  |  |
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Capital Adequacy With Buffer, Minimum |  | 0.0850 | 0.0850 |  |  |  |
Total capital to risk-weighted assets |  |  |  |  |  |  |
Minimum capital required, Capital Amount |  | $ 3,715,389 | $ 3,630,625 |  |  |  |
Minimum capital required, Ratio (as a percent) |  | 0.1050 | 0.1050 |  |  |  |
Tier One Leverage Capital to Average Assets [Abstract] |  |  |  |  |  |  |
Tier One Leverage Capital Required for Capital Adequacy |  | $ 1,765,295 | $ 1,736,991 |  |  |  |
Minimum capital required, Ratio (as a percent) |  | 0.0400 | 0.0400 |  |  |  |
ASU 2016-13 |  |  |  |  |  |  |
Tier One Leverage Capital to Average Assets [Abstract] |  |  |  |  |  |  |
Additional allowance for credit losses for loans |  |  |  |  |  | $ 54,400 |
Deferred tax assets |  |  |  |  |  | 12,600 |
Retained earnings |  |  |  |  |  | 44,800 |
ASU 2016-13 | Adjustments |  |  |  |  |  |  |
Tier One Leverage Capital to Average Assets [Abstract] |  |  |  |  |  |  |
Additional reserve for unfunded commitments |  |  |  |  |  | $ 6,400 |
Minimum |  |  |  |  |  |  |
Common equity Tier 1 to risk-weighted assets |  |  |  |  |  |  |
Actual, Ratio (as a percent) |  | 4.50% |  |  |  |  |
Tier One Risk Based Capital to Risk Weighted Assets [Abstract] |  |  |  |  |  |  |
Leverage ratio (as a percent) |  | 0.08 |  |  |  |  |
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Capital Adequacy With Buffer, Minimum |  | 6 |  |  |  |  |
Total capital to risk-weighted assets |  |  |  |  |  |  |
Capital to Risk Weighted Assets (as a percent) |  | 0.04 |  |  |  |  |
Tier One Leverage Capital to Average Assets [Abstract] |  |  |  |  |  |  |
Tier One Leverage Capital to Average Assets (as a percent) |  | 0.08 |  |  |  |  |
SouthState Bank (the Bank) |  |  |  |  |  |  |
Common equity Tier 1 to risk-weighted assets |  |  |  |  |  |  |
Actual, Capital Amount |  | $ 4,424,466 | $ 4,074,045 |  |  |  |
Actual, Ratio (as a percent) |  | 0.1252% | 0.118% |  |  |  |
Required to be considered well capitalized, Capital Amount |  | $ 2,297,250 | $ 2,244,481 |  |  |  |
Required to be considered well capitalized, Ratio (as a percent) |  | 0.065% | 0.065% |  |  |  |
Tier One Risk Based Capital to Risk Weighted Assets [Abstract] |  |  |  |  |  |  |
Actual, Capital Amount |  | $ 4,424,466 | $ 4,074,045 |  |  |  |
Actual, Ratio (as a percent) |  | 0.1252 | 0.1180 |  |  |  |
Leverage ratio (as a percent) |  | 0.1003 | 0.0939 |  |  |  |
Tier One Risk Based Capital Required to be Well Capitalized |  | $ 2,827,384 | $ 2,762,438 |  |  |  |
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets (as a percent) |  | 0.0800 | 0.0800 |  |  |  |
Total capital to risk-weighted assets |  |  |  |  |  |  |
Actual, Capital Amount |  | $ 4,858,292 | $ 4,381,336 |  |  |  |
Capital to Risk Weighted Assets (as a percent) |  | 0.1375 | 0.1269 |  |  |  |
Required to be considered well capitalized, Capital Amount |  | $ 3,534,230 | $ 3,453,047 |  |  |  |
Required to be considered well capitalized, Ratio (as a percent) |  | 0.1000 | 0.1000 |  |  |  |
Tier One Leverage Capital to Average Assets [Abstract] |  |  |  |  |  |  |
Tier One Leverage Capital |  | $ 4,424,466 | $ 4,074,045 |  |  |  |
Tier One Leverage Capital to Average Assets (as a percent) |  | 0.1003 | 0.0939 |  |  |  |
Tier One Leverage Capital Required to be Well Capitalized |  | $ 2,205,921 | $ 2,170,412 |  |  |  |
Tier One Leverage Capital Required to be Well Capitalized to Average Assets (as a percent) |  | 0.0500 | 0.0500 |  |  |  |
SouthState Bank (the Bank) | Fully Phased-In |  |  |  |  |  |  |
Common equity Tier 1 to risk-weighted assets |  |  |  |  |  |  |
Minimum capital required, Capital Amount |  | $ 2,473,961 | $ 2,417,133 |  |  |  |
Minimum capital required, Ratio (as a percent) |  | 0.07% | 0.07% |  |  |  |
Tier One Risk Based Capital to Risk Weighted Assets [Abstract] |  |  |  |  |  |  |
Banking Regulation, Tier 1 Risk-Based Capital, Capital Adequacy With Buffer, Minimum |  | $ 3,004,096 | $ 2,935,090 |  |  |  |
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Capital Adequacy With Buffer, Minimum |  | 0.0850 | 0.0850 |  |  |  |
Total capital to risk-weighted assets |  |  |  |  |  |  |
Minimum capital required, Capital Amount |  | $ 3,710,942 | $ 3,625,700 |  |  |  |
Minimum capital required, Ratio (as a percent) |  | 0.1050 | 0.1050 |  |  |  |
Tier One Leverage Capital to Average Assets [Abstract] |  |  |  |  |  |  |
Tier One Leverage Capital Required for Capital Adequacy |  | $ 1,764,736 | $ 1,736,330 |  |  |  |
Minimum capital required, Ratio (as a percent) |  | 0.0400 | 0.0400 |  |  |  |

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