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Regulatory Matters (Details) $ / shares in Units, shares in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2024 USD ($) $ / shares | Jun. 30, 2020 shares | Dec. 31, 2023 USD ($) | Dec. 31, 2021 $ / shares
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 |  | $ 2,887,804,000 |  | $ 2,784,927,000 |  |
Quarterly common stock dividend (in dollar per share) | $ / shares |  | $ 0.22 |  |  |  | $ 0.18
Depositary Shares | shares |  |  | 9,000 |  |  |
Preferred Stock, Dividend Rate, Per-Dollar-Amount | $ / shares |  | $ 16.88 |  |  |  |
Preferred Stock, Dividend Per Depositary Share |  | $ 0.422 |  |  |  |
Pinnacle Financial |  |  |  |  |  |
Actual |  |  |  |  |  |
Total capital to risk weighted assets |  | 5,232,720,000 |  | 5,115,755,000 |  |
Tier I capital to risk weighted assets |  | 4,433,585,000 |  | 4,354,759,000 |  |
Common equity Tier 1 capital to risk weighted assets |  | 4,216,336,000 |  | 4,137,510,000 |  |
Tier I capital to average assets | [1] | $ 4,433,585,000 |  | $ 4,354,759,000 |  |
Actual |  |  |  |  |  |
Total capital to risk weighted assets (as percent) |  | 0.129 |  | 0.127 |  |
Tier I capital to risk weighted assets (as percent) |  | 0.109 |  | 0.108 |  |
Common equity Tier 1 capital to risk weighted assets |  | 0.104 |  | 0.103 |  |
Tier I capital to average assets (as percent) | [1] | 0.094 |  | 0.094 |  |
Minimum Capital Requirement |  |  |  |  |  |
Total capital to risk weighted assets |  | $ 3,242,505,000 |  | $ 3,216,424,000 |  |
Tier I capital to risk weighted assets |  | 2,431,879,000 |  | 2,412,318,000 |  |
Common equity Tier 1 capital to risk weighted assets |  | 1,823,909,000 |  | 1,809,238,000 |  |
Tier I capital to average assets | [1] | $ 1,876,133,000 |  | $ 1,853,213,000 |  |
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 (1) |  |  |  |  |  |
Total capital to risk weighted assets |  | $ 4,053,131,000 |  | $ 4,020,530,000 | [2] |
Tier I capital to risk weighted assets | [2] | $ 2,431,879,000 |  | $ 2,412,318,000 |  |
Minimum To Be Well-Capitalized (1) |  |  |  |  |  |
Total capital to risk weighted assets (as percent) |  | 0.100 |  | 0.100 | [2] |
Tier I capital to risk weighted assets (as percent) | [2] | 0.060 |  | 0.060 |  |
Pinnacle Bank |  |  |  |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |  |  |  |
Cash dividends paid to Pinnacle Financial by Pinnacle Bank |  | $ 26,700,000 |  |  |  |
Retained earnings |  | 1,100,000,000 |  |  |  |
Actual |  |  |  |  |  |
Total capital to risk weighted assets |  | 4,924,981,000 |  | $ 4,797,278,000 |  |
Tier I capital to risk weighted assets |  | 4,554,846,000 |  | 4,465,282,000 |  |
Common equity Tier 1 capital to risk weighted assets |  | 4,554,723,000 |  | 4,465,159,000 |  |
Tier I capital to average assets | [1] | $ 4,554,846,000 |  | $ 4,465,282,000 |  |
Actual |  |  |  |  |  |
Total capital to risk weighted assets (as percent) |  | 0.122 |  | 0.120 |  |
Tier I capital to risk weighted assets (as percent) |  | 0.113 |  | 0.111 |  |
Common equity Tier 1 capital to risk weighted assets |  | 0.113 |  | 0.111 |  |
Tier I capital to average assets (as percent) | [1] | 0.097 |  | 0.097 |  |
Minimum Capital Requirement |  |  |  |  |  |
Total capital to risk weighted assets |  | $ 3,234,396,000 |  | $ 3,207,699,000 |  |
Tier I capital to risk weighted assets |  | 2,425,797,000 |  | 2,405,774,000 |  |
Common equity Tier 1 capital to risk weighted assets |  | 1,819,348,000 |  | 1,804,330,000 |  |
Tier I capital to average assets | [1] | $ 1,871,699,000 |  | $ 1,847,972,000 |  |
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 (1) |  |  |  |  |  |
Total capital to risk weighted assets |  | $ 4,042,995,000 |  | $ 4,009,623,000 | [2] |
Tier I capital to risk weighted assets | [2] | 3,234,396,000 |  | 3,207,699,000 |  |
Common equity Tier 1 capital to risk weighted assets | [2] | 2,627,947,000 |  | 2,606,255,000 |  |
Tier I capital to average assets | [1],[2] | $ 2,339,624,000 |  | $ 2,309,965,000 |  |
Minimum To Be Well-Capitalized (1) |  |  |  |  |  |
Total capital to risk weighted assets (as percent) |  | 0.100 |  | 0.100 | [2] |
Tier I capital to risk weighted assets (as percent) | [2] | 0.080 |  | 0.080 |  |
Common Equity Tier I capital to risk weighted assets (as percent) | [2] | 0.065 |  | 0.065 |  |
Tier I capital to average assets (as percent) | [1],[2] | 0.050 |  | 0.050 |  |
[1] | (*) Average assets for the above calculations were based on the most recent quarter.
[2] | Well-capitalized minimum Common equity Tier 1 capital to risk weighted assets and Tier 1 capital to average assets are not formally defined under applicable banking regulations for bank holding companies.

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