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Business Combinations (Schedule of Acquisitions Related Costs by Component) (Details) - MidSouth [Member] - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2019
Business Acquisition [Line Items] |  |
Personnel expense |  | $ 5,002
Net occupancy expense |  | 735
Equipment expense |  | 188
Data processing expense |  | 437
Professional services expense |  | 7,491
Advertising |  | 2,624
Printing and supplies |  | 433
Other expense |  | 11,900
Total acquisition related expenses | $ 28,800 | $ 28,810

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- Definition Business combination acquisition related costs data processing expense. + References No definition available. + Details
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Balance Type: | debit
Period Type: | duration

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- Definition Business combination acquisition related costs equipment expense. + References No definition available. + Details
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Balance Type: | debit
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- Definition Business combination acquisition related costs net occupancy expense. + References No definition available. + Details
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- Definition Business combination acquisition related costs other expenses. + References No definition available. + Details
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Balance Type: | debit
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- Definition Business combination acquisition related costs personnel expense. + References No definition available. + Details
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Namespace Prefix: | hwc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Business combination acquisition related costs printing and supplies expense. + References No definition available. + Details
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Namespace Prefix: | hwc_
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Balance Type: | debit
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- Definition Business combination acquisition related costs professional services expense. + References No definition available. + Details
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Namespace Prefix: | hwc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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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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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=116868678&loc=d3e1043-128460 + Details
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- Details
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