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Capital Ratios (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024 | Mar. 31, 2024 | Dec. 31, 2023 | Jan. 01, 2019
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Regulatory Matters |  |  |  |  |
Capital conversion buffer common equity Tier 1 of risk-weighted assets (as a percent) |  |  |  |  | 2.50%
Additional allowance for credit losses for loans | $ 623,690 | $ 465,280 | $ 469,654 | $ 456,573 |
Deferred tax assets | 153,930 | 179,884 |  |  |
Additional reserve for unfunded commitments | 62,300 |  |  |  |
Retained earnings | 2,080,053 | 2,046,809 |  |  |
Common equity Tier 1 to risk-weighted assets |  |  |  |  |
Actual, Capital Amount | $ 5,480,248 | $ 4,547,314 |  |  |
Actual, Ratio (as a percent) | 0.1103% | 12.62% |  |  |
Required to be considered well capitalized, Capital Amount | $ 3,230,921 | $ 2,342,717 |  |  |
Required to be considered well capitalized, Ratio (as a percent) | 0.065% | 6.50% |  |  |
Tier I capital to risk-weighted assets |  |  |  |  |
Actual, Capital Amount | $ 5,480,248 | $ 4,547,314 |  |  |
Actual, Ratio (as a percent) | 0.1103 | 0.1262 |  |  |
Required to be considered well capitalized, Capital Amount | $ 3,976,518 | $ 2,883,343 |  |  |
Required to be considered well capitalized, Ratio (as a percent) | 0.08 | 0.08 |  |  |
Total capital to risk-weighted assets |  |  |  |  |
Actual, Capital Amount | $ 6,819,716 | $ 5,391,194 |  |  |
Actual, Ratio (as a percent) | 0.1372 | 0.1496 |  |  |
Required to be considered well capitalized, Capital Amount | $ 4,970,648 | $ 3,604,179 |  |  |
Required to be considered well capitalized, Ratio (as a percent) | 0.10 | 0.10 |  |  |
Tier I capital to average assets (leverage ratio) |  |  |  |  |
Actual, Capital Amount | $ 5,480,248 | $ 4,547,314 |  |  |
Actual, Ratio (as a percent) | 0.0891 | 0.1004 |  |  |
Required to be considered well capitalized, Capital Amount | $ 3,076,439 | $ 2,263,732 |  |  |
Required to be considered well capitalized, Ratio (as a percent) | 0.05 | 0.05 |  |  |
SouthState Bank (the Bank) |  |  |  |  |
Common equity Tier 1 to risk-weighted assets |  |  |  |  |
Actual, Capital Amount | $ 6,104,593 | $ 4,817,945 |  |  |
Actual, Ratio (as a percent) | 0.1229% | 13.38% |  |  |
Required to be considered well capitalized, Capital Amount | $ 3,227,360 | $ 2,340,060 |  |  |
Required to be considered well capitalized, Ratio (as a percent) | 0.065% | 6.50% |  |  |
Tier I capital to risk-weighted assets |  |  |  |  |
Actual, Capital Amount | $ 6,104,593 | $ 4,817,945 |  |  |
Actual, Ratio (as a percent) | 0.1229 | 0.1338 |  |  |
Required to be considered well capitalized, Capital Amount | $ 3,972,135 | $ 2,880,074 |  |  |
Required to be considered well capitalized, Ratio (as a percent) | 0.08 | 0.08 |  |  |
Total capital to risk-weighted assets |  |  |  |  |
Actual, Capital Amount | $ 6,693,461 | $ 5,271,725 |  |  |
Actual, Ratio (as a percent) | 0.1348 | 0.1464 |  |  |
Required to be considered well capitalized, Capital Amount | $ 4,965,169 | $ 3,600,093 |  |  |
Required to be considered well capitalized, Ratio (as a percent) | 0.10 | 0.10 |  |  |
Tier I capital to average assets (leverage ratio) |  |  |  |  |
Actual, Capital Amount | $ 6,104,593 | $ 4,817,945 |  |  |
Actual, Ratio (as a percent) | 0.0992 | 0.1064 |  |  |
Required to be considered well capitalized, Capital Amount | $ 3,075,592 | $ 2,263,121 |  |  |
Required to be considered well capitalized, Ratio (as a percent) | 0.05 | 0.05 |  |  |
Fully Phased-In |  |  |  |  |
Common equity Tier 1 to risk-weighted assets |  |  |  |  |
Actual, Capital Amount | $ 3,479,453 | $ 2,522,926 |  |  |
Minimum capital required, Capital Amount | $ 4,225,051 | $ 3,063,552 |  |  |
Minimum capital required, Ratio (as a percent) | 0.07% | 7.00% |  |  |
Tier I capital to risk-weighted assets |  |  |  |  |
Minimum capital required, Capital Amount | $ 4,225,051 | $ 3,063,552 |  |  |
Minimum capital required, Ratio (as a percent) | 0.085 | 0.085 |  |  |
Total capital to risk-weighted assets |  |  |  |  |
Minimum capital required, Capital Amount | $ 5,219,180 | $ 3,784,388 |  |  |
Minimum capital required, Ratio (as a percent) | 0.105 | 0.105 |  |  |
Tier I capital to average assets (leverage ratio) |  |  |  |  |
Minimum capital required, Capital Amount | $ 2,461,151 | $ 1,810,985 |  |  |
Minimum capital required, Ratio (as a percent) | 0.04 | 0.04 |  |  |
Fully Phased-In | SouthState Bank (the Bank) |  |  |  |  |
Common equity Tier 1 to risk-weighted assets |  |  |  |  |
Actual, Capital Amount | $ 3,475,618 | $ 2,520,065 |  |  |
Minimum capital required, Capital Amount | $ 4,220,393 | $ 3,060,079 |  |  |
Minimum capital required, Ratio (as a percent) | 0.07% | 7.00% |  |  |
Tier I capital to risk-weighted assets |  |  |  |  |
Minimum capital required, Capital Amount | $ 4,220,393 | $ 3,060,079 |  |  |
Minimum capital required, Ratio (as a percent) | 0.085 | 0.085 |  |  |
Total capital to risk-weighted assets |  |  |  |  |
Minimum capital required, Capital Amount | $ 5,213,427 | $ 3,780,097 |  |  |
Minimum capital required, Ratio (as a percent) | 0.105 | 0.105 |  |  |
Tier I capital to average assets (leverage ratio) |  |  |  |  |
Minimum capital required, Capital Amount | $ 2,460,474 | $ 1,810,497 |  |  |
Minimum capital required, Ratio (as a percent) | 0.04 | 0.04 |  |  |
Minimum |  |  |  |  |
Common equity Tier 1 to risk-weighted assets |  |  |  |  |
Actual, Ratio (as a percent) | 4.50% |  |  |  |
Tier I capital to risk-weighted assets |  |  |  |  |
Minimum capital required, Ratio (as a percent) | 0.06 |  |  |  |
Total capital to risk-weighted assets |  |  |  |  |
Actual, Ratio (as a percent) | 0.04 |  |  |  |
Tier I capital to average assets (leverage ratio) |  |  |  |  |
Actual, Ratio (as a percent) | 0.08 |  |  |  |

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