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Regulatory Capital (Tables) | 12 Months Ended
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Dec. 31, 2021
Regulatory Capital Disclosure [Abstract] |
Schedule of Compliance with Regulatory Capital | The following table summarizes regulatory capital information at December 31, 2021 and 2020 for Synovus and Synovus Bank.
| Actual Capital |  | Minimum Requirement For Capital Adequacy(1) |  | To Be Well-Capitalized Under Prompt Corrective Action Provisions(2)
(dollars in thousands) | 2021 |  | 2020 |  | 2021 |  | 2020 |  | 2021 |  | 2020
Synovus Financial Corp. |  |  |  |  |  |  |  |  |  |  |
CET1 capital | $ | 4,388,618 |  |  | $ | 4,034,865 |  |  | $ | 2,079,435 |  |  | $ | 1,879,551 |  |  | N/A |  | N/A
Tier 1 risk-based capital | 4,925,763 |  |  | 4,572,010 |  |  | 2,772,581 |  |  | 2,506,068 |  |  | N/A |  | N/A
Total risk-based capital | 5,827,196 |  |  | 5,604,230 |  |  | 3,696,774 |  |  | 3,341,425 |  |  | N/A |  | N/A
CET1 capital ratio | 9.50 | % |  | 9.66 | % |  | 4.50 | % |  | 4.50 | % |  | N/A |  | N/A
Tier 1 risk-based capital ratio | 10.66 |  |  | 10.95 |  |  | 6.00 |  |  | 6.00 |  |  | N/A |  | N/A
Total risk-based capital ratio | 12.61 |  |  | 13.42 |  |  | 8.00 |  |  | 8.00 |  |  | N/A |  | N/A
Leverage ratio | 8.72 |  |  | 8.50 |  |  | 4.00 |  |  | 4.00 |  |  | N/A |  | N/A
Synovus Bank |  |  |  |  |  |  |  |  |  |  |
CET1 capital | $ | 4,998,698 |  |  | $ | 4,641,711 |  |  | $ | 2,076,515 |  |  | $ | 1,880,757 |  |  | $ | 2,999,410 |  |  | $ | 2,716,650 |
Tier 1 risk-based capital | 4,998,698 |  |  | 4,641,711 |  |  | 2,768,686 |  |  | 2,507,677 |  |  | 3,691,581 |  |  | 3,343,569 |
Total risk-based capital | 5,587,757 |  |  | 5,361,611 |  |  | 3,691,581 |  |  | 3,343,569 |  |  | 4,614,477 |  |  | 4,176,461 |
CET1 capital ratio | 10.83 | % |  | 11.11 | % |  | 4.50 | % |  | 4.50 | % |  | 6.50 | % |  | 6.50 | %
Tier 1 risk-based capital ratio | 10.83 |  |  | 11.11 |  |  | 6.00 |  |  | 6.00 |  |  | 8.00 |  |  | 8.00 |
Total risk-based capital ratio | 12.11 |  |  | 12.83 |  |  | 8.00 |  |  | 8.00 |  |  | 10.00 |  |  | 10.00 |
Leverage ratio | 8.86 |  |  | 8.73 |  |  | 4.00 |  |  | 4.00 |  |  | 5.00 |  |  | 5.00 |
(1) The additional capital conservation buffer in effect is 2.5%. (2) The prompt corrective action provisions are applicable at the bank level only.

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- Definition Regulatory Capital Disclosure [Abstract] + References No definition available. + Details
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- Definition Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
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