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Fair Value Measurements (Financial Assets Measured at Fair Value on Nonrecurring Basis) (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Collateral-dependent impaired loans | $ 206,110 | $ 184,205
Other real estate owned | 5,926 | 6,928
Total nonrecurring fair value measurements | 212,036 | 191,133
Nonrecurring [Member] | Level 1 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Collateral-dependent impaired loans |  |
Other real estate owned |  |
Total nonrecurring fair value measurements |  |
Nonrecurring [Member] | Level 2 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Collateral-dependent impaired loans | 206,110 | 184,205
Total nonrecurring fair value measurements | 206,110 | 184,205
Nonrecurring [Member] | Level 3 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Other real estate owned | 5,926 | 6,928
Total nonrecurring fair value measurements | $ 5,926 | $ 6,928

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- Definition Impaired Loans Fair Value Disclosure + References No definition available. + Details
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Balance Type: | debit
Period Type: | instant

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- Definition Real Estate Acquired Through Foreclosure Fair Value Disclosure + References No definition available. + Details
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Namespace Prefix: | hwc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
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