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Operating Leases - (Narrative) (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2025 USD ($) Leases
Leases [Line Items] |
Lessee, operating lease, existence of option to extend [true/false] | false
Lessee, operating lease, option to extend | As these extension options are not generally considered reasonably certain of renewal, they are not included in the lease term
Number of operating leases not yet commenced | Leases | 4
Discounted lease obligations | $ | $ 7.4
Minimum [Member] |
Leases [Line Items] |
Lessee, operating lease, term of contract | 5 years
Lessee, operating lease, renewal term | 1 year
Maximum [Member] |
Leases [Line Items] |
Lessee, operating lease, term of contract | 20 years
Lessee, operating lease, renewal term | 20 years

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- Definition Discounted lease obligations. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Leases. + References No definition available. + Details
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Balance Type: | na
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- Definition Number of operating leases not yet commenced. + References No definition available. + Details
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Namespace Prefix: | hwc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Indicates (true false) whether lessee has option to extend operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-3 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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- Definition Description of terms and conditions of option to extend lessee's operating lease. Includes, but is not limited to, information about option recognized as part of right-of-use asset and lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-3 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

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- Definition Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-3 + Details
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Period Type: | instant

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- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-3 + Details
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Balance Type: | na
Period Type: | instant

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- Details
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- Details
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