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Capital Ratios (Details) - USD ($) $ in Thousands | 3 Months Ended |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2022 | Sep. 30, 2023 | Jun. 30, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Dec. 31, 2021 | Jan. 01, 2020 | Jan. 01, 2019
Capital ratios |  |  |  |  |  |  |  |  |
Capital conversion buffer common equity Tier 1 of risk-weighted assets (as a percent) |  |  |  |  |  |  |  |  | 2.50%
Additional allowance for credit losses for loans |  | $ 447,956 | $ 427,392 | $ 356,444 | $ 324,398 | $ 319,708 | $ 301,807 |  |
Deferred tax assets |  | 150,422 |  | 177,801 |  |  |  |  |
Additional reserve for unfunded commitments |  | 62,300 |  |  |  |  |  |  |
Retained earnings |  | 1,618,080 |  | 1,347,042 |  |  |  |  |
Phasing out percentage | 50.00% |  |  |  |  |  |  |  |
Common equity Tier 1 to risk-weighted assets |  |  |  |  |  |  |  |  |
Actual, Capital Amount |  | $ 4,089,424 |  | $ 3,788,106 |  |  |  |  |
Actual, Ratio (as a percent) |  | 11.47% |  | 10.96% |  |  |  |  |
Minimum capital required, Capital Amount |  | $ 2,495,806 |  | $ 2,420,417 |  |  |  |  |
Minimum capital required, Ratio (as a percent) |  | 7.00% |  | 7.00% |  |  |  |  |
Required to be considered well capitalized, Capital Amount |  | $ 2,317,534 |  | $ 2,247,530 |  |  |  |  |
Required to be considered well capitalized, Ratio (as a percent) |  | 6.50% |  | 6.50% |  |  |  |  |
Tier I capital to risk-weighted assets |  |  |  |  |  |  |  |  |
Actual, Capital Amount |  | $ 4,089,424 |  | $ 3,788,106 |  |  |  |  |
Actual, Ratio (as a percent) |  | 0.1147 |  | 0.1096 |  |  |  |  |
Minimum capital required, Capital Amount |  | $ 3,030,621 |  | $ 2,939,077 |  |  |  |  |
Minimum capital required, Ratio (as a percent) |  | 0.0850 |  | 0.0850 |  |  |  |  |
Required to be considered well capitalized, Capital Amount |  | $ 2,852,349 |  | $ 2,766,190 |  |  |  |  |
Required to be considered well capitalized, Ratio (as a percent) |  | 0.0800 |  | 0.0800 |  |  |  |  |
Total capital to risk-weighted assets |  |  |  |  |  |  |  |  |
Actual, Capital Amount |  | $ 4,905,268 |  | $ 4,485,397 |  |  |  |  |
Actual, Ratio (as a percent) |  | 0.1376 |  | 0.1297 |  |  |  |  |
Minimum capital required, Capital Amount |  | $ 3,743,709 |  | $ 3,630,625 |  |  |  |  |
Minimum capital required, Ratio (as a percent) |  | 0.1050 |  | 0.1050 |  |  |  |  |
Required to be considered well capitalized, Capital Amount |  | $ 3,565,437 |  | $ 3,457,738 |  |  |  |  |
Required to be considered well capitalized, Ratio (as a percent) |  | 0.1000 |  | 0.1000 |  |  |  |  |
Tier I capital to average assets (leverage ratio) |  |  |  |  |  |  |  |  |
Actual, Capital Amount |  | $ 4,089,424 |  | $ 3,788,106 |  |  |  |  |
Actual, Ratio (as a percent) |  | 0.0934 |  | 0.0872 |  |  |  |  |
Minimum capital required, Capital Amount |  | $ 1,751,637 |  | $ 1,736,991 |  |  |  |  |
Minimum capital required, Ratio (as a percent) |  | 0.0400 |  | 0.0400 |  |  |  |  |
Required to be considered well capitalized, Capital Amount |  | $ 2,189,546 |  | $ 2,171,239 |  |  |  |  |
Required to be considered well capitalized, Ratio (as a percent) |  | 0.0500 |  | 0.0500 |  |  |  |  |
ASU 2016-13 |  |  |  |  |  |  |  |  |
Capital ratios |  |  |  |  |  |  |  |  |
Additional allowance for credit losses for loans |  |  |  |  |  |  |  | $ 54,400 |
Deferred tax assets |  |  |  |  |  |  |  | 12,600 |
Retained earnings |  |  |  |  |  |  |  | (44,800) |
ASU 2016-13 | Adjustments |  |  |  |  |  |  |  |  |
Capital ratios |  |  |  |  |  |  |  |  |
Additional reserve for unfunded commitments |  |  |  |  |  |  |  | $ 6,400 |
SouthState Bank (the Bank) |  |  |  |  |  |  |  |  |
Common equity Tier 1 to risk-weighted assets |  |  |  |  |  |  |  |  |
Actual, Capital Amount |  | $ 4,360,670 |  | $ 4,074,045 |  |  |  |  |
Actual, Ratio (as a percent) |  | 12.25% |  | 11.80% |  |  |  |  |
Minimum capital required, Capital Amount |  | $ 2,492,670 |  | $ 2,417,133 |  |  |  |  |
Minimum capital required, Ratio (as a percent) |  | 7.00% |  | 7.00% |  |  |  |  |
Required to be considered well capitalized, Capital Amount |  | $ 2,314,622 |  | $ 2,244,481 |  |  |  |  |
Required to be considered well capitalized, Ratio (as a percent) |  | 6.50% |  | 6.50% |  |  |  |  |
Tier I capital to risk-weighted assets |  |  |  |  |  |  |  |  |
Actual, Capital Amount |  | $ 4,360,670 |  | $ 4,074,045 |  |  |  |  |
Actual, Ratio (as a percent) |  | 0.1225 |  | 0.1180 |  |  |  |  |
Minimum capital required, Capital Amount |  | $ 3,026,814 |  | $ 2,935,090 |  |  |  |  |
Minimum capital required, Ratio (as a percent) |  | 0.0850 |  | 0.0850 |  |  |  |  |
Required to be considered well capitalized, Capital Amount |  | $ 2,848,766 |  | $ 2,762,438 |  |  |  |  |
Required to be considered well capitalized, Ratio (as a percent) |  | 0.0800 |  | 0.0800 |  |  |  |  |
Total capital to risk-weighted assets |  |  |  |  |  |  |  |  |
Actual, Capital Amount |  | $ 4,786,514 |  | $ 4,381,336 |  |  |  |  |
Actual, Ratio (as a percent) |  | 0.1344 |  | 0.1269 |  |  |  |  |
Minimum capital required, Capital Amount |  | $ 3,739,005 |  | $ 3,625,700 |  |  |  |  |
Minimum capital required, Ratio (as a percent) |  | 0.1050 |  | 0.1050 |  |  |  |  |
Required to be considered well capitalized, Capital Amount |  | $ 3,560,957 |  | $ 3,453,047 |  |  |  |  |
Required to be considered well capitalized, Ratio (as a percent) |  | 0.1000 |  | 0.1000 |  |  |  |  |
Tier I capital to average assets (leverage ratio) |  |  |  |  |  |  |  |  |
Actual, Capital Amount |  | $ 4,360,670 |  | $ 4,074,045 |  |  |  |  |
Actual, Ratio (as a percent) |  | 0.0996 |  | 0.0939 |  |  |  |  |
Minimum capital required, Capital Amount |  | $ 1,751,135 |  | $ 1,736,330 |  |  |  |  |
Minimum capital required, Ratio (as a percent) |  | 0.0400 |  | 0.0400 |  |  |  |  |
Required to be considered well capitalized, Capital Amount |  | $ 2,188,919 |  | $ 2,170,412 |  |  |  |  |
Required to be considered well capitalized, Ratio (as a percent) |  | 0.0500 |  | 0.0500 |  |  |  |  |
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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