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Stockholders' Equity (Compliance with Regulatory Capital Requirements) (Details) $ in Thousands | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018
--- | --- | --- | ---
Tier 1 leverage capital, Actual, Amount | $ 2,534,049 | $ 2,584,162 |
Common equity tier 1 (to risk weighted assets), Actual, Amount | 2,534,049 | 2,584,162 |
Tier 1 capital (to risk weighted assets), Actual, Amount | 2,534,049 | 2,584,162 |
Total capital (to risk weighted assets), Actual, Amount | $ 3,155,692 | $ 2,929,387 |
Tier 1 leverage capital, Actual, Ratio % | 7.88 | 8.76 |
Common equity tier 1 (to risk weighted assets), Actual, Ratio % | 10.61% | 10.50% |
Tier 1 capital (to risk weighted assets), Actual, Ratio % | 10.61 | 10.50 |
Total capital (to risk weighted assets), Actual, Ratio % | 13.22 | 11.90 |
Tier 1 leverage capital, Required for Minimum Capital Adequacy, Amount | $ 1,287,103 | $ 1,180,163 |
Common equity tier 1 (to risk weighted assets), Required for Minimum Capital Adequacy, Amount | 1,074,272 | 1,107,527 |
Tier 1 capital (to risk weighted assets), Required for Minimum Capital Adequacy, Amount | 1,432,362 | 1,476,702 |
Total capital (to risk weighted assets), Required for Minimum Capital Adequacy, Amount | $ 1,909,817 | $ 1,968,936 |
Tier 1 leverage capital, Required for Minimum Capital Adequacy, Ratio % | 4.00 | 4.00 | 0.040
Common equity tier 1 (to risk weighted assets), Required for Minimum Capital Adequacy, Ratio % | 4.50% | 4.50% | 4.50%
Tier 1 capital (to risk weighted assets), Required for Minimum Capital Adequacy, Ratio % | 6.00 | 6.00 | 0.060
Total capital (to risk weighted assets), Required for Minimum Capital Adequacy, Ratio % | 8.00 | 8.00 | 0.080
Tier 1 leverage capital, Required To Be Well Capitalized, Amount | $ 1,608,878 | $ 1,475,204 |
Common equity tier 1 (to risk weighted assets), Required To Be Well Capitalized, Amount | 1,551,726 | 1,599,761 |
Tier 1 capital (to risk weighted assets), Required To Be Well Capitalized, Amount | 1,909,817 | 1,968,936 |
Total capital (to risk weighted assets), Required To Be Well Capitalized, Amount | $ 2,387,271 | $ 2,461,171 |
Tier 1 leverage capital, Required To Be Well Capitalized, Ratio % | 5.00 | 5.00 | 5.0
Common equity tier 1 (to risk weighted assets), Required To Be Well Capitalized, Ratio % | 6.50% | 6.50% | 6.50%
Tier 1 capital (to risk weighted assets), Required To Be Well Capitalized, Ratio % | 8.00 | 8.00 | 8.0
Total capital (to risk weighted assets), Required To Be Well Capitalized, Ratio % | 10.00 | 10.00 | 10.0
Hancock Whitney Bank [Member] |  |  |
Tier 1 leverage capital, Actual, Amount | $ 2,607,215 | $ 2,640,913 |
Common equity tier 1 (to risk weighted assets), Actual, Amount | 2,607,215 | 2,640,913 |
Tier 1 capital (to risk weighted assets), Actual, Amount | 2,607,215 | 2,640,913 |
Total capital (to risk weighted assets), Actual, Amount | $ 2,905,988 | $ 2,836,138 |
Tier 1 leverage capital, Actual, Ratio % | 8.11 | 8.96 |
Common equity tier 1 (to risk weighted assets), Actual, Ratio % | 10.94% | 10.74% |
Tier 1 capital (to risk weighted assets), Actual, Ratio % | 10.94 | 10.74 |
Total capital (to risk weighted assets), Actual, Ratio % | 12.19 | 11.53 |
Tier 1 leverage capital, Required for Minimum Capital Adequacy, Amount | $ 1,286,059 | $ 1,179,194 |
Common equity tier 1 (to risk weighted assets), Required for Minimum Capital Adequacy, Amount | 1,072,924 | 1,106,558 |
Tier 1 capital (to risk weighted assets), Required for Minimum Capital Adequacy, Amount | 1,430,565 | 1,475,411 |
Total capital (to risk weighted assets), Required for Minimum Capital Adequacy, Amount | $ 1,907,420 | $ 1,967,214 |
Tier 1 leverage capital, Required for Minimum Capital Adequacy, Ratio % | 4.00 | 4.00 |
Common equity tier 1 (to risk weighted assets), Required for Minimum Capital Adequacy, Ratio % | 4.50% | 4.50% |
Tier 1 capital (to risk weighted assets), Required for Minimum Capital Adequacy, Ratio % | 6.00 | 6.00 |
Total capital (to risk weighted assets), Required for Minimum Capital Adequacy, Ratio % | 8.00 | 8.00 |
Tier 1 leverage capital, Required To Be Well Capitalized, Amount | $ 1,607,573 | $ 1,473,992 |
Common equity tier 1 (to risk weighted assets), Required To Be Well Capitalized, Amount | 1,549,778 | 1,598,362 |
Tier 1 capital (to risk weighted assets), Required To Be Well Capitalized, Amount | 1,907,420 | 1,967,214 |
Total capital (to risk weighted assets), Required To Be Well Capitalized, Amount | $ 2,384,275 | $ 2,459,018 |
Tier 1 leverage capital, Required To Be Well Capitalized, Ratio % | 5.00 | 5.00 |
Common equity tier 1 (to risk weighted assets), Required To Be Well Capitalized, Ratio % | 6.50% | 6.50% |
Tier 1 capital (to risk weighted assets), Required To Be Well Capitalized, Ratio % | 8.00 | 8.00 |
Total capital (to risk weighted assets), Required To Be Well Capitalized, Ratio % | 10.00 | 10.00 |

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