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Regulatory Matters (Details) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 shares | Sep. 30, 2020 USD ($) $ / shares | Sep. 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 |  |  | $ 1,312,929 |  | $ 1,184,183
Quarterly common stock dividend (in dollar per share) | $ / shares |  |  | $ 0.16 |  |
Minimum To Be Well-Capitalized Under Prompt Corrective Action Regulations |  |  |  |  |
Issuance of preferred stock, net of issuance costs |  |  | $ 217,126 | $ 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 |  |  | 119,100 |  |
Actual |  |  |  |  |
Total capital to risk weighted assets |  |  | 3,578,436 |  | 3,159,375
Tier I capital to risk weighted assets |  |  | 2,702,540 |  | 2,319,234
Common Equity Tier I capital to risk weighted assets |  |  | 2,485,291 |  | 2,319,112
Tier I capital to average assets | [1] |  | $ 2,702,540 |  | $ 2,319,234
Actual |  |  |  |  |
Total capital to risk weighted assets (as percent) |  |  | 0.142 |  | 0.132
Tier I capital to risk weighted assets (as percent) |  |  | 0.107 |  | 0.097
Common Equity Tier I capital to risk weighted assets (as percent) |  |  | 0.099 |  | 0.097
Tier I capital to average assets (as percent) | [1] |  | 0.085 |  | 0.091
Minimum Capital Requirement |  |  |  |  |
Total capital to risk weighted assets |  |  | $ 2,015,196 |  | $ 1,912,885
Tier I capital to risk weighted assets |  |  | 1,511,397 |  | 1,434,664
Common Equity Tier I capital |  |  | 1,133,547 |  | 1,075,998
Tier I capital to average assets | [1] |  | $ 1,273,124 |  | $ 1,021,836
Minimum Capital Requirement |  |  |  |  |
Total capital to risk weighted assets (as percent) |  |  | 0.080 |  | 0.080
Tier I capital to risk weighted assets (as percent) |  |  | 0.060 |  | 0.060
Common Equity Tier I capital to risk weighted assets (as percent) |  |  | 0.045 |  | 0.045
Tier I capital to average assets (as percent) | [1] |  | 0.040 |  | 0.040
Minimum To Be Well-Capitalized Under Prompt Corrective Action Regulations |  |  |  |  |
Total capital to risk weighted assets |  |  | $ 2,518,994 |  | $ 2,391,106
Tier I capital to risk weighted assets |  |  | $ 2,015,196 |  | $ 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
Tier I capital to risk weighted assets (as percent) |  |  | 0.080 |  | 0.080
Pinnacle Bank |  |  |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |  |  |
Retained earnings |  |  | $ 675,700 |  |
Actual |  |  |  |  |
Total capital to risk weighted assets |  |  | 3,146,468 |  | $ 2,906,853
Tier I capital to risk weighted assets |  |  | 2,819,572 |  | 2,679,713
Common Equity Tier I capital to risk weighted assets |  |  | 2,819,450 |  | 2,679,590
Tier I capital to average assets | [1] |  | $ 2,819,572 |  | $ 2,679,713
Actual |  |  |  |  |
Total capital to risk weighted assets (as percent) |  |  | 0.126 |  | 0.122
Tier I capital to risk weighted assets (as percent) |  |  | 0.113 |  | 0.112
Common Equity Tier I capital to risk weighted assets (as percent) |  |  | 0.113 |  | 0.112
Tier I capital to average assets (as percent) | [1] |  | 0.089 |  | 0.105
Minimum Capital Requirement |  |  |  |  |
Total capital to risk weighted assets |  |  | $ 2,005,334 |  | $ 1,906,839
Tier I capital to risk weighted assets |  |  | 1,504,000 |  | 1,430,129
Common Equity Tier I capital |  |  | 1,128,000 |  | 1,072,597
Tier I capital to average assets | [1] |  | $ 1,269,171 |  | $ 1,019,210
Minimum Capital Requirement |  |  |  |  |
Total capital to risk weighted assets (as percent) |  |  | 0.080 |  | 0.080
Tier I capital to risk weighted assets (as percent) |  |  | 0.060 |  | 0.060
Common Equity Tier I capital to risk weighted assets (as percent) |  |  | 0.045 |  | 0.045
Tier I capital to average assets (as percent) | [1] |  | 0.040 |  | 0.040
Minimum To Be Well-Capitalized Under Prompt Corrective Action Regulations |  |  |  |  |
Total capital to risk weighted assets |  |  | $ 2,506,667 |  | $ 2,383,549
Tier I capital to risk weighted assets |  |  | 2,005,334 |  | 1,906,839
Common Equity Tier I capital to risk weighted assets |  |  | 1,629,333 |  | 1,549,307
Tier I capital to average assets | [1] |  | $ 1,586,464 |  | $ 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
Tier I capital to risk weighted assets (as percent) |  |  | 0.080 |  | 0.080
Common Equity Tier I capital to risk weighted assets (as percent) |  |  | 0.065 |  | 0.065
Tier I capital to average assets (as percent) | [1] |  | 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 required for capital adequacy 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 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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- 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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