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Basis of Presentation (Details) | 12 Months Ended
--- | ---
Dec. 31, 2021 subsidiary
Property, Plant and Equipment [Line Items] |
Number of unconsolidated subsidiaries | 0
Manufacturing Facility |
Property, Plant and Equipment [Line Items] |
Number of manufacturing facilities | 120

X
- Definition Number of manufacturing facilities + References No definition available. + Details
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Namespace Prefix: | lcii_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number Of Unconsolidated Subsidiaries + References No definition available. + Details
Name: | lcii_NumberOfUnconsolidatedSubsidiaries
Namespace Prefix: | lcii_
Data Type: | xbrli:integerItemType
Balance Type: | na
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_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_ManufacturingFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |