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Regulatory Matters (Tables) | 12 Months Ended
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Dec. 31, 2020
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract] |
Summary of Regulatory Capital Requirement | Management believes, as of December 31, 2020, that Pinnacle Financial and Pinnacle Bank met all capital adequacy requirements to which they are subject. To be categorized as well-capitalized under applicable banking regulations, Pinnacle Financial and Pinnacle Bank must maintain certain total, Tier 1, common equity Tier 1 and Tier 1 leverage capital ratios as set forth in the following table and not be subject to a written agreement, order or directive to maintain a higher capital level. The capital conservation buffer is not included in the required ratios of the table presented below. Pinnacle Financial's and Pinnacle Bank's actual capital amounts and ratios are presented in the following table (in thousands):
| Actual |  | Minimum Capital Requirement |  | Minimum To Be Well-Capitalized
| Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio
December 31, 2020 |  |  |  |  |  |  |  |  |  |  |
Total capital to risk weighted assets: |  |  |  |  |  |  |  |  |  |  |
Pinnacle Financial | $ | 3,678,405 |  |  | 14.3 | % |  | $ | 2,063,352 |  |  | 8.0 | % |  | $ | 2,579,190 |  |  | 10.0 | %
Pinnacle Bank | $ | 3,259,538 |  |  | 12.7 | % |  | $ | 2,055,892 |  |  | 8.0 | % |  | $ | 2,569,865 |  |  | 10.0 | %
Tier 1 capital to risk weighted assets: |  |  |  |  |  |  |  |  |  |  |
Pinnacle Financial | $ | 2,803,541 |  |  | 10.9 | % |  | $ | 1,547,514 |  |  | 6.0 | % |  | $ | 2,063,352 |  |  | 8.0 | %
Pinnacle Bank | $ | 2,933,674 |  |  | 11.4 | % |  | $ | 1,541,919 |  |  | 6.0 | % |  | $ | 2,055,892 |  |  | 8.0 | %
Common equity Tier 1 capital: |  |  |  |  |  |  |  |  |  |  |
Pinnacle Financial | $ | 2,586,292 |  |  | 10.0 | % |  | $ | 1,160,635 |  |  | 4.5 | % |  | N/A |  | N/A
Pinnacle Bank | $ | 2,933,551 |  |  | 11.4 | % |  | $ | 1,156,439 |  |  | 4.5 | % |  | $ | 1,670,412 |  |  | 6.5 | %
Tier 1 capital to average assets (*): |  |  |  |  |  |  |  |  |  |  |
Pinnacle Financial | $ | 2,803,541 |  |  | 8.6 | % |  | $ | 1,298,756 |  |  | 4.0 | % |  | N/A |  | N/A
Pinnacle Bank | $ | 2,933,674 |  |  | 9.1 | % |  | $ | 1,294,033 |  |  | 4.0 | % |  | $ | 1,617,541 |  |  | 5.0 | %
| Actual |  | Minimum Capital Requirement |  | Minimum To Be Well-Capitalized
| Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio
December 31, 2019 |  |  |  |  |  |  |  |  |  |  |
Total capital to risk weighted assets: |  |  |  |  |  |  |  |  |  |  |
Pinnacle Financial | $ | 3,159,375 |  |  | 13.2 | % |  | $ | 1,912,885 |  |  | 8.0 | % |  | $ | 2,391,106 |  |  | 10.0 | %
Pinnacle Bank | $ | 2,906,853 |  |  | 12.2 | % |  | $ | 1,906,839 |  |  | 8.0 | % |  | $ | 2,383,549 |  |  | 10.0 | %
Tier 1 capital to risk weighted assets: |  |  |  |  |  |  |  |  |  |  |
Pinnacle Financial | $ | 2,319,234 |  |  | 9.7 | % |  | $ | 1,434,664 |  |  | 6.0 | % |  | $ | 1,912,885 |  |  | 8.0 | %
Pinnacle Bank | $ | 2,679,713 |  |  | 11.2 | % |  | $ | 1,430,129 |  |  | 6.0 | % |  | $ | 1,906,839 |  |  | 8.0 | %
Common equity Tier 1 capital: |  |  |  |  |  |  |  |  |  |  |
Pinnacle Financial | $ | 2,319,112 |  |  | 9.7 | % |  | $ | 1,075,998 |  |  | 4.5 | % |  | N/A |  | N/A
Pinnacle Bank | $ | 2,679,590 |  |  | 11.2 | % |  | $ | 1,072,597 |  |  | 4.5 | % |  | $ | 1,549,307 |  |  | 6.5 | %
Tier 1 capital to average assets (*): |  |  |  |  |  |  |  |  |  |  |
Pinnacle Financial | $ | 2,319,234 |  |  | 9.1 | % |  | $ | 1,021,836 |  |  | 4.0 | % |  | N/A |  | N/A
Pinnacle Bank | $ | 2,679,713 |  |  | 10.5 | % |  | $ | 1,019,210 |  |  | 4.0 | % |  | $ | 1,274,012 |  |  | 5.0 | %
(*) Average assets for the above calculations were based on the most recent quarter.

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- Definition Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity. + 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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