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Regulatory Capital | 12 Months Ended
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Dec. 31, 2021
Regulatory Capital Disclosure [Abstract] |
Regulatory Capital | Note 10 - Regulatory Capital Synovus and Synovus Bank are each subject to regulatory capital requirements administered by the federal banking agencies under Basel III. Failure to meet minimum capital requirements can initiate certain mandatory, and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the consolidated financial statements. Specific capital levels that involve quantitative measures of both on- and off-balance sheet items as calculated under regulatory capital guidelines must be met. Capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Additionally, regulatory capital rules include a capital conservation buffer of 2.5% that is added on top of each of the minimum risk-based capital ratios in order to avoid restrictions on capital distributions and discretionary bonuses. Management currently believes, based on internal capital analyses and earnings projections, that Synovus' and Synovus Bank’s capital positions are each adequate to meet regulatory minimum capital requirements inclusive of the capital conservation buffer. Synovus Bank is also required to maintain certain capital levels, and not be subject to any written agreement, order, capital directive, or prompt corrective action directive requiring it to meet and maintain a specific capital level for any capital measure, in order to be considered a well-capitalized institution as defined by federal prompt corrective action banking regulations. 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 The entire disclosure for regulatory capital requirement for depository and lending institutions. Institutions include, but not are not limited to, finance company, insured depository institution, bank holding company, savings and loan association holding company, bank and savings institution not federally insured, mortgage company, foreign financial institution and credit union. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1F -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958575-112826 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)(2) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958569-112826 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1D -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958573-112826 + Details
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