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Regulatory Matters (Details) - USD ($) $ / shares in Units, $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2019 | Dec. 31, 2018
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 |  | $ 1,100,517 | $ 833,130
Quarterly common stock dividend (in dollar per share) |  | $ 0.16 |
Pinnacle Financial |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Cash dividends paid to Pinnacle Financial by Pinnacle Bank |  | $ 96,300 |
Actual |  |  |
Total capital to risk weighted assets |  | 3,093,547 | 2,580,143
Tier I capital to risk weighted assets |  | 2,238,535 | 2,024,193
Common Equity Tier I capital to risk weighted assets |  | 2,238,413 | 2,024,070
Tier I capital to average assets | [1] | $ 2,238,535 | $ 2,024,193
Actual |  |  |
Total capital to risk weighted assets (as percent) |  | 13.20% | 12.20%
Tier I capital to risk weighted assets (as percent) |  | 9.60% | 9.60%
Common Equity Tier I capital to risk weighted assets (as percent) |  | 9.60% | 9.60%
Tier I capital to average assets (as percent) | [1] | 8.90% | 8.90%
Minimum Capital Requirement |  |  |
Total capital to risk weighted assets |  | $ 1,874,904 | $ 1,691,017
Tier I capital to risk weighted assets |  | 1,406,178 | 1,268,263
Common Equity Tier I capital |  | 1,054,634 | 951,197
Tier I capital to average assets | [1] | $ 1,003,329 | $ 909,102
Minimum Capital Requirement |  |  |
Total capital to risk weighted assets (as percent) |  | 8.00% | 8.00%
Tier I capital to risk weighted assets (as percent) |  | 6.00% | 6.00%
Common Equity Tier I capital to risk weighted assets (as percent) |  | 4.50% | 4.50%
Tier I capital to average assets (as percent) | [1] | 4.00% | 4.00%
Pinnacle Bank |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Retained earnings |  | $ 617,500 |
Actual |  |  |
Total capital to risk weighted assets |  | 2,818,988 | $ 2,432,419
Tier I capital to risk weighted assets |  | 2,592,976 | 2,218,003
Common Equity Tier I capital to risk weighted assets |  | 2,592,854 | 2,217,880
Tier I capital to average assets | [1] | $ 2,592,976 | $ 2,218,003
Actual |  |  |
Total capital to risk weighted assets (as percent) |  | 12.10% | 11.50%
Tier I capital to risk weighted assets (as percent) |  | 11.10% | 10.50%
Common Equity Tier I capital to risk weighted assets (as percent) |  | 11.10% | 10.50%
Tier I capital to average assets (as percent) | [1] | 10.40% | 9.80%
Minimum Capital Requirement |  |  |
Total capital to risk weighted assets |  | $ 1,869,627 | $ 1,686,046
Tier I capital to risk weighted assets |  | 1,402,221 | 1,264,535
Common Equity Tier I capital |  | 1,051,665 | 948,401
Tier I capital to average assets | [1] | $ 998,695 | $ 906,185
Minimum Capital Requirement |  |  |
Total capital to risk weighted assets (as percent) |  | 8.00% | 8.00%
Tier I capital to risk weighted assets (as percent) |  | 6.00% | 6.00%
Common Equity Tier I capital to risk weighted assets (as percent) |  | 4.50% | 4.50%
Tier I capital to average assets (as percent) | [1] | 4.00% | 4.00%
Minimum To Be Well-Capitalized Under Prompt Corrective Action Resolutions |  |  |
Total capital to risk weighted assets |  | $ 2,337,034 | $ 2,107,558
Tier I capital to risk weighted assets |  | 1,869,627 | 1,686,046
Common Equity Tier I capital to risk weighted assets |  | 1,519,072 | 1,369,912
Tier I capital to average assets | [1] | $ 1,248,369 | $ 1,132,731
Minimum To Be Well-Capitalized Under Prompt Corrective Action Resolutions |  |  |
Total capital to risk weighted assets (as percent) |  | 10.00% | 10.00%
Tier I capital to risk weighted assets (as percent) |  | 8.00% | 8.00%
Common Equity Tier I capital to risk weighted assets (as percent) |  | 6.50% | 6.50%
Tier I capital to average assets (as percent) | [1] | 5.00% | 5.00%
[1] | (*) Average assets for the above calculations were based on the most recent quarter.

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