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Loans and Allowance for Loan Losses (Activity in Loss Share Receivable) (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2017 | Mar. 31, 2016
Loans and Allowance for Loan Losses [Abstract] |  |
Beginning balance | $ 16,219 | $ 29,868
Amortization | (1,100) | (1,613)
Charge-offs, write-downs and other recoveries | (1,231) | (1,005)
External expenses qualifying under loss share agreement | 131 | 465
Changes due to changes in cash flow projections | (1,830) | (2,189)
Net payments to FDIC | 1,131 | 302
Ending balance | $ 13,320 | $ 25,828

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- Definition FDIC Indemnification Asset Amortization Accretion + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition FDIC Indemnification Asset Qualifying External Expenses + References No definition available. + Details
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Namespace Prefix: | hbhc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Net payments paid to (received from) FDIC. + References No definition available. + Details
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Namespace Prefix: | hbhc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Carrying amount of receivable assets originating from the indemnification agreement with the Federal Deposit Insurance Corporation (FDIC), in which the FDIC is to partially cover losses. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Amount of decreases to the indemnification asset due to write offs of loans, net of recoveries, relating to loss sharing agreements with the Federal Deposit Insurance Corporation (FDIC). + References No definition available. + Details
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- Definition Change in carrying amount of the indemnification asset relating to loss sharing agreements with the Federal Deposit Insurance Corporation (FDIC). The change includes for example, but is not limited to, acquisitions, additional estimated losses, disposals, cash payments, accretion of discount and write-offs, net of recoveries. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Balance Type: | na
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