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v3.5.0.2

Retirement Plans (Narrative) (Details) | 9 Months Ended
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Sep. 30, 2016 USD ($)
Defined Benefit Plan Disclosure [Line Items] |
Estimated contribution in the current year | $ 0
First 1% Of Contribution Saved [Member] | Other Post-Retirement Benefits [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Matching percentage | 100.00%
Percentage of compensation saved | 1.00%
Next 5% Of Contribution Saved [Member] | Other Post-Retirement Benefits [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Matching percentage | 50.00%
Percentage of compensation saved | 5.00%

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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
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of employer's best estimate of contributions expected to be paid to the plan in the current remaining fiscal period. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
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
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_StatementScenarioAxis=hbhc_FirstOnePercentOfContributionSavedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis=us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementScenarioAxis=hbhc_NextFivePercentOfContributionSavedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |