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Other Noninterest Expense (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Other Expense Disclosure Nonoperating [Abstract] |  |
Corporate value and franchise taxes | $ 4,248 | $ 4,464
Telecommunications and postage | 2,925 | 3,318
Advertising | 3,166 | 2,486
Entertainment and contributions | 2,961 | 1,448
Tax credit investment amortization | 1,004 | 1,112
Printing and supplies | 1,003 | 978
Travel expense | 660 | 357
Net other retirement expense | (6,772) | (6,545)
Other miscellaneous | 9,045 | 6,130
Total other noninterest expense | $ 18,240 | $ 13,748

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- Definition Ad valorem and franchise taxes. + References No definition available. + Details
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Balance Type: | debit
Period Type: | duration

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- Definition Entertainment and contributions. + 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 Net other retirement expense (income). + References No definition available. + Details
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- Definition Other Miscellaneous Noninterest Expense + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Tax Credit Investment Amortization + References No definition available. + Details
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- Definition Travel Expense + References No definition available. + Details
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Balance Type: | debit
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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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Balance Type: | debit
Period Type: | duration

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- Definition The amount of expense incurred in the period for communication, which is the exchange of information by several methods. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.6) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 + Details
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- References No definition available. + Details
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- Definition Amount of noninterest expense classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.14) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
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- Definition Amount of expense associated with supplies that were used during the current accounting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.14) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
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