| Document and Entity Information | 12 Months Ended |
| Dec. 31, 2022 | |
| Cover [Abstract] | |
| Document Type | DEF 14A |
| Amendment Flag | false |
| Entity Registrant Name | LCI INDUSTRIES |
| Entity Central Index Key | 0000763744 |
| Pay vs Performance Disclosure - USD ($) | 12 Months Ended | ||
| Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | |
| Pay vs Performance Disclosure [Table] | |||
| Pay vs Performance [Table Text Block] | PAY VERSUS PERFORMANCE The following table sets forth information regarding compensation of our CEO (referred to as our “PEO” in this section) and our other NEOs (the “Non-PEO NEOs”) on an average basis, along with total shareholder return, net income, and Adjusted EBIT for our fiscal years 2022, 2021, and 2020, as required by the SEC’s pay versus performance rules. For information regarding the Compensation Committee’s pay-for-performance philosophy and how executive compensation is aligned with Company performance, refer to the CD&A. Pay Versus Performance Tables (“PVP”) Year SCT Total for PEO (1) CAP to PEO (4) Average SCT Total for Non-PEO NEOs (1) Average CAP to Non-PEO NEOs (4) Value of Initial Fixed $100 Investment Based On: Net Income ($mm) Adjusted EBIT ($mm) (3) TSR Peer Group TSR (2) (a) (b) (c) (d) (e) (f) (g) (h) (i) 2022 $10,533,675 $(2,915,608) $3,770,625 $1,515,940 $94 $102 $395 $553 2021 $10,993,750 $24,642,255 $3,792,843 $5,626,233 $153 $151 $288 $398 2020 $9,509,751 $13,440,874 $2,299,341 $2,809,689 $124 $123 $158 $247 Legend SCT — “Summary Compensation Table” CAP — “Compensation Actually Paid” TSR — “Total Shareholder Return” (1) The following individuals are included as PEO and Non-PEO NEOs in the table above. Years PEO Non-PEO NEOs 2022 - 2020 Jason D. Lippert Brian M. Hall Ryan R. Smith Jamie M. Schnur Andrew J. Namenye (2) Our peer group for the calculation of TSR is the S&P Composite 1500 Auto Parts & Equipment Index, which is the industry index used in our stock price performance graph in our 2022 Annual Report to Stockholders. (3) Adjusted EBIT is identified as our company-selected measure. Adjusted EBIT is a non-GAAP financial measure. Refer to Appendix A to this Proxy Statement for a reconciliation of this non-GAAP financial measure to the corresponding GAAP measure. (4) The following adjustments were made to adjust SCT total pay in determining CAP. No adjustments were required in respect of stock options as none were granted and included in the SCT during 2020 - 2022. NEO Year SCT Total Deductions from SCT Total Additions or Deductions to SCT Total CAP Amounts Reported in the Summary Compensation Table Stock Awards Column Amounts Reported in the Summary Compensation Table for Pension Value ($) Value of Equity Award Adjustments Calculated in Accordance with CAP Requirements (a) Value of Service Cost and Prior Service Cost under the Pension Plans Jason D. 2022 $10,533,675 $(6,522,567) — $(6,926,716) — $(2,915,608) 2021 $10,993,750 $(5,245,239) — $18,893,744 — $24,642,255 2020 $9,509,751 $(5,316,527) — $9,247,650 — $13,440,874 Average for 2022 $3,770,625 $(1,680,171) — $(574,514) — $1,515,940 Non-PEO 2021 $3,792,843 $(1,087,172) — $2,920,563 — $5,626,233 NEOs 2020 $2,299,341 $(707,881) — $1,218,229 — $2,809,689 (a) The following elements comprise the equity fair value adjustments included in CAP. NEO Year Fair value at fiscal year (FY) end, of equity awards granted during the FY that remained outstanding Change in fair value at FY end versus prior FY end for awards granted in any prior FY that remained outstanding Change in fair value at vesting date versus prior FY end for awards granted in any prior FY that vested during the FY Total Equity Adjustments Reflected in CAP Jason D. Lippert 2022 $3,128,591 $(6,657,207) $(3,398,100) $(6,926,716) 2021 $9,113,251 $9,213,995 $566,498 $18,893,744 2020 $8,564,877 $1,017,350 $(334,577) $9,247,650 Average for 2022 $854,897 $(1,049,842) $(379,569) $(574,514) Non-PEO 2021 $1,888,872 $940,829 $90,862 $2,920,563 NEOs 2020 $1,101,643 $153,430 $(36,843) $1,218,229 | ||
| Company Selected Measure Name | Adjusted EBIT | ||
| Named Executive Officers, Footnote [Text Block] | (1) The following individuals are included as PEO and Non-PEO NEOs in the table above. Years PEO Non-PEO NEOs 2022 - 2020 Jason D. Lippert Brian M. Hall Ryan R. Smith Jamie M. Schnur Andrew J. Namenye | ||
| Peer Group Issuers, Footnote [Text Block] | (2) Our peer group for the calculation of TSR is the S&P Composite 1500 Auto Parts & Equipment Index, which is the industry index used in our stock price performance graph in our 2022 Annual Report to Stockholders. | ||
| PEO Total Compensation Amount | $ 10,533,675 | $ 10,993,750 | $ 9,509,751 |
| PEO Actually Paid Compensation Amount | $ (2,915,608) | 24,642,255 | 13,440,874 |
| Adjustment To PEO Compensation, Footnote [Text Block] | (4) The following adjustments were made to adjust SCT total pay in determining CAP. No adjustments were required in respect of stock options as none were granted and included in the SCT during 2020 - 2022. NEO Year SCT Total Deductions from SCT Total Additions or Deductions to SCT Total CAP Amounts Reported in the Summary Compensation Table Stock Awards Column Amounts Reported in the Summary Compensation Table for Pension Value ($) Value of Equity Award Adjustments Calculated in Accordance with CAP Requirements (a) Value of Service Cost and Prior Service Cost under the Pension Plans Jason D. 2022 $10,533,675 $(6,522,567) — $(6,926,716) — $(2,915,608) 2021 $10,993,750 $(5,245,239) — $18,893,744 — $24,642,255 2020 $9,509,751 $(5,316,527) — $9,247,650 — $13,440,874 Average for 2022 $3,770,625 $(1,680,171) — $(574,514) — $1,515,940 Non-PEO 2021 $3,792,843 $(1,087,172) — $2,920,563 — $5,626,233 NEOs 2020 $2,299,341 $(707,881) — $1,218,229 — $2,809,689 (a) The following elements comprise the equity fair value adjustments included in CAP. NEO Year Fair value at fiscal year (FY) end, of equity awards granted during the FY that remained outstanding Change in fair value at FY end versus prior FY end for awards granted in any prior FY that remained outstanding Change in fair value at vesting date versus prior FY end for awards granted in any prior FY that vested during the FY Total Equity Adjustments Reflected in CAP Jason D. Lippert 2022 $3,128,591 $(6,657,207) $(3,398,100) $(6,926,716) 2021 $9,113,251 $9,213,995 $566,498 $18,893,744 2020 $8,564,877 $1,017,350 $(334,577) $9,247,650 Average for 2022 $854,897 $(1,049,842) $(379,569) $(574,514) Non-PEO 2021 $1,888,872 $940,829 $90,862 $2,920,563 NEOs 2020 $1,101,643 $153,430 $(36,843) $1,218,229 | ||
| Non-PEO NEO Average Total Compensation Amount | $ 3,770,625 | 3,792,843 | 2,299,341 |
| Non-PEO NEO Average Compensation Actually Paid Amount | $ 1,515,940 | 5,626,233 | 2,809,689 |
| Adjustment to Non-PEO NEO Compensation Footnote [Text Block] | (4) The following adjustments were made to adjust SCT total pay in determining CAP. No adjustments were required in respect of stock options as none were granted and included in the SCT during 2020 - 2022. NEO Year SCT Total Deductions from SCT Total Additions or Deductions to SCT Total CAP Amounts Reported in the Summary Compensation Table Stock Awards Column Amounts Reported in the Summary Compensation Table for Pension Value ($) Value of Equity Award Adjustments Calculated in Accordance with CAP Requirements (a) Value of Service Cost and Prior Service Cost under the Pension Plans Jason D. 2022 $10,533,675 $(6,522,567) — $(6,926,716) — $(2,915,608) 2021 $10,993,750 $(5,245,239) — $18,893,744 — $24,642,255 2020 $9,509,751 $(5,316,527) — $9,247,650 — $13,440,874 Average for 2022 $3,770,625 $(1,680,171) — $(574,514) — $1,515,940 Non-PEO 2021 $3,792,843 $(1,087,172) — $2,920,563 — $5,626,233 NEOs 2020 $2,299,341 $(707,881) — $1,218,229 — $2,809,689 (a) The following elements comprise the equity fair value adjustments included in CAP. NEO Year Fair value at fiscal year (FY) end, of equity awards granted during the FY that remained outstanding Change in fair value at FY end versus prior FY end for awards granted in any prior FY that remained outstanding Change in fair value at vesting date versus prior FY end for awards granted in any prior FY that vested during the FY Total Equity Adjustments Reflected in CAP Jason D. Lippert 2022 $3,128,591 $(6,657,207) $(3,398,100) $(6,926,716) 2021 $9,113,251 $9,213,995 $566,498 $18,893,744 2020 $8,564,877 $1,017,350 $(334,577) $9,247,650 Average for 2022 $854,897 $(1,049,842) $(379,569) $(574,514) Non-PEO 2021 $1,888,872 $940,829 $90,862 $2,920,563 NEOs 2020 $1,101,643 $153,430 $(36,843) $1,218,229 | ||
| Compensation Actually Paid vs. Total Shareholder Return [Text Block] | The following charts show, for each of 2020, 2021, and 2022, the relationship between CAP to our PEO and to the average of our Non-PEO NEOs, to our TSR, our peer group’s TSR, our net income, and our Adjusted EBIT. | ||
| Compensation Actually Paid vs. Net Income [Text Block] | The following charts show, for each of 2020, 2021, and 2022, the relationship between CAP to our PEO and to the average of our Non-PEO NEOs, to our TSR, our peer group’s TSR, our net income, and our Adjusted EBIT. | ||
| Compensation Actually Paid vs. Company Selected Measure [Text Block] | The following charts show, for each of 2020, 2021, and 2022, the relationship between CAP to our PEO and to the average of our Non-PEO NEOs, to our TSR, our peer group’s TSR, our net income, and our Adjusted EBIT. | ||
| Total Shareholder Return Vs Peer Group [Text Block] | The following charts show, for each of 2020, 2021, and 2022, the relationship between CAP to our PEO and to the average of our Non-PEO NEOs, to our TSR, our peer group’s TSR, our net income, and our Adjusted EBIT. | ||
| Tabular List [Table Text Block] | Tabular List of Company Performance Measures For the fiscal year ended December 31, 2022, Adjusted EBIT is identified as the most important financial performance measure in linking “compensation actually paid” to our performance; Adjusted EBIT was the only performance measure used in our annual cash incentive program in 2022. The other most important financial performance measure used in 2022 in linking “compensation actually paid” to our performance is ROIC; ROIC was the only performance measure used in our PSU awards granted in 2022. We only used these two financial measures in our 2022 incentive plans, so only those two are being disclosed in the following table. Tabular List of Most Important Measures (1) Adjusted EBIT (2) ROIC | ||
| Total Shareholder Return Amount | $ 94 | 153 | 124 |
| Peer Group Total Shareholder Return Amount | 102 | 151 | 123 |
| Net Income (Loss) | $ 395,000,000 | $ 288,000,000 | $ 158,000,000 |
| Company Selected Measure Amount | 553,000,000 | 398,000,000 | 247,000,000 |
| PEO Name | Jason D. Lippert | Jason D. Lippert | Jason D. Lippert |
| Measure [Axis]: 1 | |||
| Pay vs Performance Disclosure [Table] | |||
| Measure Name | Adjusted EBIT | ||
| Non-GAAP Measure Description [Text Block] | (3) Adjusted EBIT is identified as our company-selected measure. Adjusted EBIT is a non-GAAP financial measure. Refer to Appendix A to this Proxy Statement for a reconciliation of this non-GAAP financial measure to the corresponding GAAP measure. | ||
| Measure [Axis]: 2 | |||
| Pay vs Performance Disclosure [Table] | |||
| Measure Name | ROIC | ||
| PEO [Member] | Amounts Reported in the Summary Compensation Table Stock Awards [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | $ (6,522,567) | $ (5,245,239) | $ (5,316,527) |
| PEO [Member] | Amounts Reported in the Summary Compensation Table for Pension Value [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | 0 | 0 | 0 |
| PEO [Member] | Value of Equity Award Adjustments Calculated in Accordance with CAP Requirements [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (6,926,716) | 18,893,744 | 9,247,650 |
| PEO [Member] | Fair Value at Fiscal Year (FY) End of Equity Awards Granted During the FY that Remained Outstanding [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | 3,128,591 | 9,113,251 | 8,564,877 |
| PEO [Member] | Change in Fair Value at FY End Versus Prior FY End for Awards Granted in any Prior FY that Remained Outstanding [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (6,657,207) | 9,213,995 | 1,017,350 |
| PEO [Member] | Change in Fair Value at Vesting Date Versus Prior FY End for Awards Granted in any Prior FY that Vested During The FY [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (3,398,100) | 566,498 | (334,577) |
| PEO [Member] | Value of Service Cost and Prior Service Cost under the Pension Plans [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | 0 | 0 | 0 |
| Non-PEO NEO [Member] | Amounts Reported in the Summary Compensation Table Stock Awards [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (1,680,171) | (1,087,172) | (707,881) |
| Non-PEO NEO [Member] | Amounts Reported in the Summary Compensation Table for Pension Value [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | 0 | 0 | 0 |
| Non-PEO NEO [Member] | Value of Equity Award Adjustments Calculated in Accordance with CAP Requirements [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (574,514) | 2,920,563 | 1,218,229 |
| Non-PEO NEO [Member] | Fair Value at Fiscal Year (FY) End of Equity Awards Granted During the FY that Remained Outstanding [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | 854,897 | 1,888,872 | 1,101,643 |
| Non-PEO NEO [Member] | Change in Fair Value at FY End Versus Prior FY End for Awards Granted in any Prior FY that Remained Outstanding [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (1,049,842) | 940,829 | 153,430 |
| Non-PEO NEO [Member] | Change in Fair Value at Vesting Date Versus Prior FY End for Awards Granted in any Prior FY that Vested During The FY [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (379,569) | 90,862 | (36,843) |
| Non-PEO NEO [Member] | Value of Service Cost and Prior Service Cost under the Pension Plans [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | $ 0 | $ 0 | $ 0 |
