Basis of Presentation	6 Months Ended
Basis of Presentation	Jun. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis Of Presentation	BASIS OF PRESENTATION The Condensed Consolidated Financial Statements include the accounts of LCI Industries and its wholly-owned subsidiaries (“LCII” and collectively with its subsidiaries, the “Company,” "we," "us," or "our"). 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 primarily 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 June 30, 2020, the Company operated over 90 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, 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 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 may be different in 2020 and 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 Condensed 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 Condensed Consolidated Financial Statements. In the opinion of management, the information furnished in this Form 10-Q reflects all adjustments necessary for a fair statement of the financial position and results of operations for the interim periods presented. The Condensed Consolidated Financial Statements have been prepared in accordance with the instructions to Form 10-Q, and therefore do not include some information necessary to conform to annual reporting requirements. Results for interim periods should not be considered indicative of results for the full year. 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 On March 11, 2020, the World Health Organization declared the outbreak of coronavirus ("COVID-19") a pandemic, and on March 13, 2020, the United States declared a national emergency related to COVID-19. The 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 financing options were halted. Due to the uncertainty surrounding the COVID-19 pandemic, the Company remains disciplined with other cost savings and cash preservation measures, such as delaying capital expenditures and reducing or eliminating non-critical business expenses including travel. The extent to which COVID-19 may impact the Company's liquidity, financial condition, and results of operations remains uncertain.