XML 73 R58.htm IDEA: XBRL DOCUMENT
v3.20.4

Business Combination (Schedule of Goodwill) (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Business Acquisition [Line Items] |  |
Goodwill, Beginning Balance | $ 855,453,000 | $ 790,972,000
Goodwill, Ending Balance | 855,453,000 | 855,453,000
MidSouth [Member] |  |
Business Acquisition [Line Items] |  |
Goodwill, Beginning Balance | 63,400,000 |
Goodwill, Initial goodwill recorded |  | 69,207,000
Goodwill, Measurement period adjustments | 0 | (5,838,000)
Goodwill, Ending Balance | $ 63,369,000 | 63,400,000
Trust and Asset Management Business [Member] |  |
Business Acquisition [Line Items] |  |
Final settlement of cash consideration - acquisition of trust and asset management business |  | $ 1,112,000

X
- Definition Goodwill final settlement cash consideration. + References No definition available. + Details
Name: | hwc_GoodwillFinalSettlementCashConsideration
Namespace Prefix: | hwc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Goodwill, Measurement Period Adjustments + References No definition available. + Details
Name: | hwc_GoodwillMeasurementPeriodAdjustments
Namespace Prefix: | hwc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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
Name: | us-gaap_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
Name: | us-gaap_GoodwillAcquiredDuringPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=hwc_MidSouthBancorpIncorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=hwc_TrustAndAssetManagementAcquisitionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |