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Regulatory Matters (Details) - USD ($) $ / shares in Units, $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2018 | Dec. 31, 2017
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Preceding period of retained earnings used in calculation of dividend payable |  | 2 years |
Quarterly common stock dividend (in dollar per share) |  | $ 0.14 |
Pinnacle Financial |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Cash dividends paid to Pinnacle Financial by Pinnacle Bank |  | $ 66,000 |
Actual |  |  |
Total capital to risk weighted assets |  | 2,508,348 | $ 2,266,161
Tier I capital to risk weighted assets |  | 1,955,095 | 1,725,323
Common Equity Tier I capital to risk weighted assets |  | 1,954,972 | 1,725,219
Tier I capital to average assets | [1] | $ 1,955,095 | $ 1,725,323
Actual |  |  |
Total capital to risk weighted assets (as percent) |  | 12.10% | 12.00%
Tier I capital to risk weighted assets (as percent) |  | 9.40% | 9.10%
Common Equity Tier I capital to risk weighted assets (as percent) |  | 9.40% | 9.10%
Tier I capital to average assets (as percent) | [1] | 8.80% | 8.60%
Minimum Capital Requirement |  |  |
Total capital to risk weighted assets |  | $ 1,656,444 | $ 1,509,496
Tier I capital to risk weighted assets |  | 1,242,333 | 1,132,122
Common Equity Tier I capital |  | 931,750 | 849,092
Tier I capital to average assets | [1] | $ 888,029 | $ 797,861
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 |  |  |
Actual |  |  |
Total capital to risk weighted assets |  | $ 2,344,597 | $ 2,134,344
Tier I capital to risk weighted assets |  | 2,133,834 | 1,936,313
Common Equity Tier I capital to risk weighted assets |  | 2,133,711 | 1,936,209
Tier I capital to average assets | [1] | $ 2,133,834 | $ 1,936,313
Actual |  |  |
Total capital to risk weighted assets (as percent) |  | 11.40% | 11.30%
Tier I capital to risk weighted assets (as percent) |  | 10.30% | 10.30%
Common Equity Tier I capital to risk weighted assets (as percent) |  | 10.30% | 10.30%
Tier I capital to average assets (as percent) | [1] | 9.60% | 9.70%
Minimum Capital Requirement |  |  |
Total capital to risk weighted assets |  | $ 1,650,616 | $ 1,504,765
Tier I capital to risk weighted assets |  | 1,237,962 | 1,128,574
Common Equity Tier I capital |  | 928,471 | 846,430
Tier I capital to average assets | [1] | $ 885,345 | $ 796,235
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 |  |  |
Total capital to risk weighted assets |  | $ 2,063,269 | $ 1,880,956
Tier I capital to risk weighted assets |  | 1,650,616 | 1,504,765
Common Equity Tier I capital to risk weighted assets |  | 1,341,125 | 1,222,621
Tier I capital to average assets | [1] | $ 1,106,681 | $ 995,294
Minimum To Be Well-Capitalized |  |  |
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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