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v3.24.3

Retirement Plans (Narrative) (Details) | 9 Months Ended
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Sep. 30, 2024
Defined Benefit Plan Disclosure [Line Items] |
Newly eligible associates initial savings rate | 3.00%
First 1% Of Contribution Saved [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Matching percentage | 100.00%
Percentage of compensation saved | 1.00%
Next 5% Of Contribution Saved [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Matching percentage | 50.00%
Percentage of compensation saved | 5.00%
Amended Hancock 401K Plan [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Additional matching percentage | 2.00%
Period of employment for eligibility | 3 years
Amended Hancock 401K Plan [Member] | 4% Of Contribution [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Matching percentage | 4.00%
Amended Hancock 401K Plan [Member] | 6% Of Contribution [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Matching percentage | 6.00%
Amended Hancock 401K Plan [Member] | 2% Of Contribution [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Matching percentage | 2.00%

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- Definition Defined Contribution Plan, Employer Matching Contribution, Additional Percent of Match + References No definition available. + Details
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Namespace Prefix: | hwc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Defined Contribution Plan, Initial Savings Rate + References No definition available. + Details
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Namespace Prefix: | hwc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Defined contribution plan, period of employment for eligibility. + References No definition available. + Details
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Balance Type: | na
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementScenarioAxis=hwc_NextFivePercentOfContributionSavedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementScenarioAxis=hwc_FourPercentOfContributionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementScenarioAxis=hwc_TwoPercentOfContributionMember
Namespace Prefix: |
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Balance Type: |
Period Type: |