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Regulatory Matters (Details) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 USD ($) $ / shares shares | Jun. 30, 2020 USD ($) $ / shares | Jun. 30, 2019 USD ($) | Dec. 31, 2019 USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |  |  |
Preceding period of retained earnings used in calculation of dividend payable |  |  | 2 years |  |
Retained earnings |  | $ 1,218,367 | $ 1,218,367 |  | $ 1,184,183
Quarterly common stock dividend (in dollar per share) | $ / shares |  | $ 0.16 | $ 0.16 |  |
Minimum To Be Well-Capitalized Under Prompt Corrective Action Regulations |  |  |  |  |
Issuance of preferred stock, net of issuance costs |  |  | $ 217,632 | $ 0 |
Depositary Shares | shares |  | 9,000 |  |  |
Pinnacle Financial |  |  |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |  |  |
Cash dividends paid to Pinnacle Financial by Pinnacle Bank |  |  | 94,100 |  |
Actual |  |  |  |  |
Total capital to risk weighted assets |  | $ 3,499,695 | 3,499,695 |  | 3,159,375
Tier I capital to risk weighted assets |  | 2,601,104 | 2,601,104 |  | 2,319,234
Common Equity Tier I capital to risk weighted assets |  | 2,383,349 | 2,383,349 |  | 2,319,112
Tier I capital to average assets | [1] | $ 2,601,104 | $ 2,601,104 |  | $ 2,319,234
Actual |  |  |  |  |
Total capital to risk weighted assets (as percent) |  | 0.140 | 0.140 |  | 0.132
Tier I capital to risk weighted assets (as percent) |  | 0.104 | 0.104 |  | 0.097
Common Equity Tier I capital to risk weighted assets (as percent) |  | 0.096 | 0.096 |  | 0.097
Tier I capital to average assets (as percent) | [1] | 0.084 | 0.084 |  | 0.091
Minimum Capital Requirement |  |  |  |  |
Total capital to risk weighted assets |  | $ 1,995,003 | $ 1,995,003 |  | $ 1,912,885
Tier I capital to risk weighted assets |  | 1,496,252 | 1,496,252 |  | 1,434,664
Common Equity Tier I capital |  | 1,122,189 | 1,122,189 |  | 1,075,998
Tier I capital to average assets | [1] | $ 1,231,757 | $ 1,231,757 |  | $ 1,021,836
Minimum Capital Requirement |  |  |  |  |
Total capital to risk weighted assets (as percent) |  | 0.080 | 0.080 |  | 0.080
Tier I capital to risk weighted assets (as percent) |  | 0.060 | 0.060 |  | 0.060
Common Equity Tier I capital to risk weighted assets (as percent) |  | 0.045 | 0.045 |  | 0.045
Tier I capital to average assets (as percent) | [1] | 0.040 | 0.040 |  | 0.040
Minimum To Be Well-Capitalized Under Prompt Corrective Action Regulations |  |  |  |  |
Total capital to risk weighted assets |  | $ 2,493,754 | $ 2,493,754 |  | $ 2,391,106
Tier I capital to risk weighted assets |  | $ 1,995,003 | $ 1,995,003 |  | $ 1,912,885
Minimum To Be Well-Capitalized Under Prompt Corrective Action Regulations |  |  |  |  |
Total capital to risk weighted assets (as percent) |  | 0.100 | 0.100 |  | 0.100
Tier I capital to risk weighted assets (as percent) |  | 0.080 | 0.080 |  | 0.080
Pinnacle Bank |  |  |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |  |  |
Retained earnings |  | $ 619,200 | $ 619,200 |  |
Actual |  |  |  |  |
Total capital to risk weighted assets |  | 3,078,671 | 3,078,671 |  | $ 2,906,853
Tier I capital to risk weighted assets |  | 2,729,080 | 2,729,080 |  | 2,679,713
Common Equity Tier I capital to risk weighted assets |  | 2,728,958 | 2,728,958 |  | 2,679,590
Tier I capital to average assets | [1] | $ 2,729,080 | $ 2,729,080 |  | $ 2,679,713
Actual |  |  |  |  |
Total capital to risk weighted assets (as percent) |  | 0.124 | 0.124 |  | 0.122
Tier I capital to risk weighted assets (as percent) |  | 0.110 | 0.110 |  | 0.112
Common Equity Tier I capital to risk weighted assets (as percent) |  | 0.110 | 0.110 |  | 0.112
Tier I capital to average assets (as percent) | [1] | 0.089 | 0.089 |  | 0.105
Minimum Capital Requirement |  |  |  |  |
Total capital to risk weighted assets |  | $ 1,988,337 | $ 1,988,337 |  | $ 1,906,839
Tier I capital to risk weighted assets |  | 1,491,253 | 1,491,253 |  | 1,430,129
Common Equity Tier I capital |  | 1,118,439 | 1,118,439 |  | 1,072,597
Tier I capital to average assets | [1] | $ 1,226,324 | $ 1,226,324 |  | $ 1,019,210
Minimum Capital Requirement |  |  |  |  |
Total capital to risk weighted assets (as percent) |  | 0.080 | 0.080 |  | 0.080
Tier I capital to risk weighted assets (as percent) |  | 0.060 | 0.060 |  | 0.060
Common Equity Tier I capital to risk weighted assets (as percent) |  | 0.045 | 0.045 |  | 0.045
Tier I capital to average assets (as percent) | [1] | 0.040 | 0.040 |  | 0.040
Minimum To Be Well-Capitalized Under Prompt Corrective Action Regulations |  |  |  |  |
Total capital to risk weighted assets |  | $ 2,485,421 | $ 2,485,421 |  | $ 2,383,549
Tier I capital to risk weighted assets |  | 1,988,337 | 1,988,337 |  | 1,906,839
Common Equity Tier I capital to risk weighted assets |  | 1,615,524 | 1,615,524 |  | 1,549,307
Tier I capital to average assets | [1] | $ 1,532,905 | $ 1,532,905 |  | $ 1,274,012
Minimum To Be Well-Capitalized Under Prompt Corrective Action Regulations |  |  |  |  |
Total capital to risk weighted assets (as percent) |  | 0.100 | 0.100 |  | 0.100
Tier I capital to risk weighted assets (as percent) |  | 0.080 | 0.080 |  | 0.080
Common Equity Tier I capital to risk weighted assets (as percent) |  | 0.065 | 0.065 |  | 0.065
Tier I capital to average assets (as percent) | [1] | 0.050 | 0.050 |  | 0.050
[1] | (*) Average assets for the above calculations were based on the most recent quarter.

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- Definition Ratio of minimum Tier 1 risk-based capital to risk-weighted assets categorized as well capitalized as defined by regulatory framework for prompt corrective action. + References Reference 1: 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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- Definition Ratio of Tier 1 risk-based capital to risk-weighted assets as defined by regulatory framework. + References Reference 1: 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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