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Regulatory Matters (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 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 |  | $ 914,545,000 | $ 833,130,000
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 |  | $ 39,100,000 |
Actual |  |  |
Total capital to risk weighted assets |  | 2,635,562,000 | 2,580,143,000
Tier I capital to risk weighted assets |  | 2,078,454,000 | 2,024,193,000
Common Equity Tier I capital to risk weighted assets |  | 2,078,331,000 | 2,024,070,000
Tier I capital to average assets | [1] | $ 2,078,454,000 | $ 2,024,193,000
Actual |  |  |
Total capital to risk weighted assets (as percent) |  | 12.00% | 12.20%
Tier I capital to risk weighted assets (as percent) |  | 9.40% | 9.60%
Common Equity Tier I capital to risk weighted assets (as percent) |  | 9.40% | 9.60%
Tier I capital to average assets (as percent) | [1] | 9.00% | 8.90%
Minimum Capital Requirement |  |  |
Total capital to risk weighted assets |  | $ 1,760,157,000 | $ 1,691,017,000
Tier I capital to risk weighted assets |  | 1,320,118,000 | 1,268,263,000
Common Equity Tier I capital |  | 990,088,000 | 951,197,000
Tier I capital to average assets | [1] | $ 924,540,000 | $ 909,102,000
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 |  | $ 637,400,000 |
Actual |  |  |
Total capital to risk weighted assets |  | 2,495,127,000 | $ 2,432,419,000
Tier I capital to risk weighted assets |  | 2,277,027,000 | 2,218,003,000
Common Equity Tier I capital to risk weighted assets |  | 2,276,904,000 | 2,217,880,000
Tier I capital to average assets | [1] | $ 2,277,027,000 | $ 2,218,003,000
Actual |  |  |
Total capital to risk weighted assets (as percent) |  | 11.40% | 11.50%
Tier I capital to risk weighted assets (as percent) |  | 10.40% | 10.50%
Common Equity Tier I capital to risk weighted assets (as percent) |  | 10.40% | 10.50%
Tier I capital to average assets (as percent) | [1] | 9.90% | 9.80%
Minimum Capital Requirement |  |  |
Total capital to risk weighted assets |  | $ 1,756,333,000 | $ 1,686,046,000
Tier I capital to risk weighted assets |  | 1,317,250,000 | 1,264,535,000
Common Equity Tier I capital |  | 987,937,000 | 948,401,000
Tier I capital to average assets | [1] | $ 922,810,000 | $ 906,185,000
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 |  | $ 2,195,416,000 | $ 2,107,558,000
Tier I capital to risk weighted assets |  | 1,756,333,000 | 1,686,046,000
Common Equity Tier I capital to risk weighted assets |  | 1,427,020,000 | 1,369,912,000
Tier I capital to average assets | [1] | $ 1,153,512,000 | $ 1,132,731,000
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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