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Segment Information - Narrative (Details) | 3 Months Ended
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Mar. 31, 2024 reporting_unit operatingUnit segment
Segment Reporting Information [Line Items] |
Number of reportable segments | segment | 2
Truckload Transportation Services |
Segment Reporting Information [Line Items] |
Number of operating units | operatingUnit | 2
Werner Logistics |
Segment Reporting Information [Line Items] |
Number of operating units | reporting_unit | 3

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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-18 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
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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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Number Of Operating Units + References No definition available. + Details
Name: | wern_NumberOfOperatingUnits
Namespace Prefix: | wern_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=wern_TruckloadTransportationServicesSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=wern_WernerLogisticsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |