Basis of Presentation	12 Months Ended
Basis of Presentation	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	BASIS OF PRESENTATION The Consolidated Financial Statements include the accounts of LCI Industries and its wholly-owned subsidiaries (“LCII” and collectively with its subsidiaries, the “Company”). LCII has no unconsolidated subsidiaries. LCII, through its wholly-owned subsidiary, Lippert Components, Inc. and its subsidiaries (collectively, “Lippert Components” or “LCI”), supplies, domestically and internationally, a broad array of engineered components for the leading original equipment manufacturers (“OEMs”) in the recreation and transportation product markets, consisting of recreational vehicles (“RVs”) and adjacent industries including buses; trailers used to haul boats, livestock, equipment, and other cargo; trucks; boats; trains; manufactured homes; and modular housing. The Company also supplies engineered components to the related aftermarkets of these industries, primarily by selling to retail dealers, wholesale distributors, and service centers. At December 31, 2020, the Company operated over 100 manufacturing and distribution facilities located throughout North America and Europe. Most industries where the Company sells products or where its products are used historically have been seasonal and are generally at the highest levels when the weather is moderate. Accordingly, the Company’s sales and profits have generally been the highest in the second quarter and lowest in the fourth quarter. However, because of fluctuations in dealer inventories, the impact of international, national and regional economic conditions and consumer confidence on retail sales of RVs, and other products for which the Company sells its components, the timing of dealer orders, and the impact of severe weather conditions on the timing of industry-wide shipments from time to time, current and future seasonal industry trends may be different than in prior years, particularly as a result of the coronavirus ("COVID-19") pandemic and related impacts. Additionally, sales of certain engineered components to the aftermarket channels of these industries tend to be counter-seasonal, but were different in 2020 and may be different in future years as a result of the COVID-19 pandemic and related impacts. The Company is not aware of any significant events, except as disclosed in the Notes to Consolidated Financial Statements, which occurred subsequent to the balance sheet date but prior to the filing of this report that would have a material impact on the Consolidated Financial Statements. All significant intercompany balances and transactions have been eliminated. Certain prior year balances have been reclassified to conform to the current year presentation. Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires the Company to make estimates and judgments that affect the reported amounts of assets, liabilities, net sales and expenses, and related disclosure of contingent assets and liabilities. On an ongoing basis, the Company evaluates its estimates, including, but not limited to, those related to product returns, sales and purchase rebates, accounts receivable, inventories, goodwill and other intangible assets, net assets of acquired businesses, income taxes, warranty and product recall obligations, self-insurance obligations, operating lease right-of-use assets and obligations, asset retirement obligations, long-lived assets, pension and post-retirement benefits, stock-based compensation, segment allocations, contingent consideration, environmental liabilities, contingencies, and litigation. The Company bases its estimates on historical experience, other available information, and various other assumptions believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities not readily apparent from other resources. Actual results and events could differ significantly from management estimates. Impact of COVID-19 The COVID-19 pandemic has caused significant uncertainty and disruption in the global economy and financial markets. On March 25, 2020, the Company issued a press release providing a business update regarding COVID-19, including that it was temporarily suspending production at select manufacturing facilities across North America and Europe. The temporary suspension of production was made on a plant-by-plant basis, consistent with government mandates or due to customer closures. Production at facilities considered essential continued, utilizing reduced staff in conjunction with heightened cleaning and sanitation processes. On April 8, 2020, the Company issued a press release with additional business updates related to COVID-19, including cost savings and cash preservation measures that it had taken, including temporary executive salary and director retainer reductions, rightsizing its workforce to match demand levels, delaying certain capital expenses and reducing or eliminating non-critical business expenses, initiating temporary hiring freezes in all locations and furloughs for non-critical team members, lease payment deferrals, postponing merit increases for salaried employees until the end of the fiscal year, and engaging with banking partners regarding options relative to future financial liquidity. Additionally, the April 8 press release announced community support initiatives including donations of personal protective equipment and other supplies throughout local communities, manufacturing medical face shields used by doctors and nurses in Italy, and the establishment of a temporary emergency fund to aid team members who have faced personal and financial difficulties due to the COVID-19 pandemic. The Company resumed operations to varying degrees for the majority of its facilities on May 4, 2020 to meet the demand requirements of its customers, and by later in the second quarter, the Company's facilities were fully operational. As the Company returned to fully operational status, several of the cost savings and cash preservation measures previously announced on April 8, 2020 were reversed, including executive salary and director retainer reductions, furloughs, and hiring freezes, and discussions with banking partners about additional or alternative financing options were halted. The extent to which COVID-19 may impact the Company's future liquidity, financial condition, and results of operations remains uncertain.