XML 25 R2.htm IDEA: XBRL DOCUMENT
v3.22.4

Pay vs Performance Disclosure | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($) $ / shares | Dec. 31, 2021 USD ($) $ / shares | Dec. 31, 2020 USD ($) $ / shares
Pay vs Performance Disclosure [Table] |  |  |
Pay vs Performance [Table Text Block] | PAY VERSUS PERFORMANCE The following table presents specified executive compensation and financial performance measures for the Company’s three most recently completed fiscal years.
​ | Year | ​ | ​ | Summary Compensation Table Total for PEO | ​ | ​ | Compensation Actually Paid to PEO (1) | ​ | ​ | Average Summary Compensation Table Total for Non-PEO NEOs | ​ | ​ | Average Compensation Actually Paid to Non- PEO Named Executive Officers (2) | ​ | ​ | Value of Initial Fixed $100 Investment Based On: | ​ | ​ | Net Income (4) | ​ | ​ | Adjusted Earnings Per Share (5) | ​
​ | Total Shareholder Return | ​ | ​ | Peer Group Total Shareholder Return (3) | ​
​ | 2022 | ​ | ​ | $6,850,271 | ​ | ​ | $1,148,117 | ​ | ​ | $2,253,183 | ​ | ​ | $311,368 | ​ | ​ | $118.21 | ​ | ​ | $124.87 | ​ | ​ | $373.3 | ​ | ​ | $17.26 | ​
​ | 2021 | ​ | ​ | $6,170,131 | ​ | ​ | $10,569,353 | ​ | ​ | $2,155,166 | ​ | ​ | $3,602,524 | ​ | ​ | $167.40 | ​ | ​ | $151.36 | ​ | ​ | $283.8 | ​ | ​ | $12.88 | ​
​ | 2020 | ​ | ​ | $4,065,061 | ​ | ​ | $9,624,985 | ​ | ​ | $1,722,056 | ​ | ​ | $3,711,472 | ​ | ​ | $134.50 | ​ | ​ | $120.75 | ​ | ​ | $130.0 | ​ | ​ | $6.23 | ​
(1) | The table below outlines the amounts included as additions and deductions in the calculation of Compensation Actually Paid (CAP) for our Principal Executive Officer (PEO), David W. Heinzmann.
​ | Year | ​ | ​ | Reported Summary Compensation Table total for PEO | ​ | ​ | Reported Value of Equity Awards | ​ | ​ | Equity Award Adjustments (a) | ​ | ​ | Compensation Actually Paid to PEO | ​
​ | ($) | ​ | ​ | ($) Stock Awards (b) | ​ | ​ | ($) Option Awards (c) | ​ | ​ | ($) Stock Awards (d) | ​ | ​ | ($) Option Awards (e) | ​ | ​ | ($) | ​
​ | 2022 | ​ | ​ | $6,850,271 | ​ | ​ | $1,960,305 | ​ | ​ | $1,984,294 | ​ | ​ | $361,791 | ​ | ​ | ($2,119,346) | ​ | ​ | $1,148,117 | ​
​ | 2021 | ​ | ​ | $6,170,131 | ​ | ​ | $1,715,931 | ​ | ​ | $1,396,152 | ​ | ​ | $2,936,037 | ​ | ​ | $4,575,268 | ​ | ​ | $10,569,353 | ​
​ | 2020 | ​ | ​ | $4,065,061 | ​ | ​ | $1,543,674 | ​ | ​ | $1,340,271 | ​ | ​ | $3,083,060 | ​ | ​ | $5,360,809 | ​ | ​ | $9,624,985 | ​
(a) | The methodology for estimating the fair value of restricted stock unit awards is consistent with the methodology as described in Note 12 “Stock-Based Compensation” of the Notes to Consolidated Financial Statements included in our 2020-2022 Annual Reports on Form 10-K. The methodology for estimating the fair value of stock option awards at each applicable measurement date is consistent with the Black Scholes methodology as described in Note 12 “Stock-Based Compensation” of the Notes to Consolidated Financial Statements included in our 2020-2022 Annual Reports on Form 10-K, with the exception of the expected life assumption. The expected life assumption used in estimating the stock option valuations noted above ranges from 0.85 to 4.02 years.
(b) | The reported value of equity awards represents the grant date fair value of restricted stock unit awards as reported in the “Stock Awards” column of the Summary Compensation Table for each applicable year.
(c) | The reported value of option awards represents the grant date fair value of stock option awards as reported in the “Option Awards” column of the Summary Compensation Table for each applicable year.
(d) | The equity award adjustments incorporate the following additions (or subtractions, as applicable):
(i) | the respective year-end estimated fair value of any equity awards granted in the applicable year that are both outstanding and unvested as of each year; 2022: $1,870,840; 2021: $2,027,364; 2020: $2,996,776
(ii) | the amount of change in estimated fair value as of the end of each applicable year as compared to the prior fiscal year for all awards granted in prior years that remain outstanding and unvested as of each year; 2022: ($780,780); 2021: $673,996; 2020: $443,446
(iii) | for all awards granted in prior years that vest in the applicable year, the amount equal to the change in fair value as of the vesting date compared to the estimated fair value from the prior fiscal year; 2022: ($728,269); 2021: $234,677; 2020: ($357,162)
(e) | The option award adjustments for each applicable year include the addition (or subtraction, as applicable) of the following:
(i) | the respective year-end estimated fair value of any equity awards granted in the applicable year that are both outstanding and unvested as of each year; 2022: $1,816,846; 2021: $1,856,699; 2020: $5,129,591
(ii) | the amount of change in estimated fair value as of the end of each applicable year as compared to the prior fiscal year for all awards granted in prior years that remain outstanding and unvested as of each year; 2022: ($1,904,221); 2021: $2,124,028; 2020: $847,250
(iii) | for all awards granted in prior years that vest in the applicable year, the amount equal to the change in fair value as of the vesting date compared to the estimated fair value from the prior fiscal year; 2022: ($2,031,971); 2021: $594,541; 2020: ($616,032)
(2) | The table below outlines the amounts included as additions and deductions in the calculation of compensation actually paid (CAP) for Non-PEO NEOs.
​ | Year | ​ | ​ | Reported Summary Compensation Table Total for Non-PEO | ​ | ​ | Reported Value of Equity Awards | ​ | ​ | Equity Award Adjustments (a) | ​ | ​ | Compensation Actually Paid to Non-PEO NEOs | ​
​ | ($) | ​ | ​ | ($) Stock Awards (b) | ​ | ​ | ($) Option Awards (c) | ​ | ​ | ($) Stock Awards (d) | ​ | ​ | ($) Option Awards (e) | ​ | ​ | ($) | ​
​ | 2022 (f) | ​ | ​ | $2,253,183 | ​ | ​ | $536,076 | ​ | ​ | $542,601 | ​ | ​ | ($29,073) | ​ | ​ | ($834,065) | ​ | ​ | $311,368 | ​
​ | 2021 (g) | ​ | ​ | $2,155,166 | ​ | ​ | $649,769 | ​ | ​ | $428,533 | ​ | ​ | $1,067,878 | ​ | ​ | $1,457,782 | ​ | ​ | $3,602,524 | ​
​ | 2020 (h) | ​ | ​ | $1,722,056 | ​ | ​ | $564,463 | ​ | ​ | $620,423 | ​ | ​ | $1,119,992 | ​ | ​ | $2,054,310 | ​ | ​ | $3,711,472 | ​
(a) | The methodology for estimating the fair value of restricted stock unit awards is consistent with the methodology as described in Note 12 “Stock-Based Compensation” of the Notes to Consolidated Financial Statements included in our 2020-2022 Annual Reports on Form 10-K. The methodology for estimating the fair value of stock option awards at each applicable measurement date is consistent with the Black Scholes methodology as described in Note 12 “Stock-Based Compensation” of the Notes to Consolidated Financial Statements included in our 2020-2022 Annual Reports on Form 10-K, with the exception of the expected life assumption. The expected life assumption used in estimating the stock option valuations noted above ranges from 0.85 to 4.02 years.
(b) | The reported value of equity awards represents the grant date fair value of restricted stock unit awards as reported in the “Stock Awards” column of the Summary Compensation Table for each applicable year.
(c) | The reported value of option awards represents the grant date fair value of stock option awards as reported in the “Option Awards” column of the Summary Compensation Table for each applicable year.
(d) | The equity award adjustments for stock in each applicable year include the addition (or subtraction, as applicable) of the following:
(i) | the respective year-end estimated fair value of any equity awards granted in the applicable year that are both outstanding and unvested as of each year; 2022: $511,609; 2021: $771,458; 2020: $863,429
(ii) | the amount of change in estimated fair value as of the end of each applicable year as compared to the prior fiscal year for all awards granted in prior years that remain outstanding and unvested as of each year; 2022: ($339,626); 2021: $235,855; 2020: $360,228
(iii) | for all awards granted in prior years that vest in the applicable year, the amount equal to the change in fair value as of the vesting date compared to the estimated fair value from the prior fiscal year; 2022: ($201,056); 2021: $60,565; 2020: ($103,665)
(e) | The option award adjustments for each applicable year include the addition (or subtraction, as applicable) of the following:
(i) | the respective year-end estimated fair value of any equity awards granted in the applicable year that are outstanding and unvested as of each year; 2022: $496,813; 2021: $572,479; 2020: $1,477,981
(ii) | the amount of change in estimated fair value as of the end of each applicable year as compared to the prior fiscal year for all awards granted in prior years that remain outstanding and unvested as of each year; 2022: ($795,064); 2021: $731,620; 2020: $760,646
(iii) | for all awards granted in prior years that vest in the applicable year, the amount equal to the change in fair value as of the vesting date compared to the estimated fair value from the prior fiscal year; 2022: ($535,814); 2021: $153,683; 2020: ($184,317)
(f) | For fiscal year 2022, the following NEOs are included in the calculation: Meenal A. Sethna, Ryan K. Stafford, Maggie Chu, and Deepak Nayar
(g) | For fiscal year 2021, the following NEOs are included in the calculation: Meenal A. Sethna, Ryan K. Stafford, Maggie Chu, and Deepak Nayar
(h) | For fiscal year 2020, the following NEOs are included in the calculation: Meenal A. Sethna, Ryan K. Stafford, Matthew J. Cole, and Deepak Nayar
(3) | Peer Group used for Total Shareholder Return (TSR) is the same peer group as disclosed in Item 5 in our 2022 Annual Report on Form 10-K.
(4) | Net Income is shown in millions, as reported in our 2022 Annual Report on Form 10-K.
(5) | Company Selected Measure used is Adjusted Earnings Per Share. Adjusted Earnings Per Share (AIP EPS) is calculated as described for “AIP EPS” in footnote 1 on page 33.
Company Selected Measure Name | Adjusted Earnings Per Share |  |
Named Executive Officers, Footnote [Text Block] |
(f) | For fiscal year 2022, the following NEOs are included in the calculation: Meenal A. Sethna, Ryan K. Stafford, Maggie Chu, and Deepak Nayar
(g) | For fiscal year 2021, the following NEOs are included in the calculation: Meenal A. Sethna, Ryan K. Stafford, Maggie Chu, and Deepak Nayar
(h) | For fiscal year 2020, the following NEOs are included in the calculation: Meenal A. Sethna, Ryan K. Stafford, Matthew J. Cole, and Deepak Nayar
Peer Group Issuers, Footnote [Text Block] |
(3) | Peer Group used for Total Shareholder Return (TSR) is the same peer group as disclosed in Item 5 in our 2022 Annual Report on Form 10-K.
PEO Total Compensation Amount | $ 6,850,271 | $ 6,170,131 | $ 4,065,061
PEO Actually Paid Compensation Amount | $ 1,148,117 | 10,569,353 | 9,624,985
Adjustment To PEO Compensation, Footnote [Text Block] |
(1) | The table below outlines the amounts included as additions and deductions in the calculation of Compensation Actually Paid (CAP) for our Principal Executive Officer (PEO), David W. Heinzmann.
​ | Year | ​ | ​ | Reported Summary Compensation Table total for PEO | ​ | ​ | Reported Value of Equity Awards | ​ | ​ | Equity Award Adjustments (a) | ​ | ​ | Compensation Actually Paid to PEO | ​
​ | ($) | ​ | ​ | ($) Stock Awards (b) | ​ | ​ | ($) Option Awards (c) | ​ | ​ | ($) Stock Awards (d) | ​ | ​ | ($) Option Awards (e) | ​ | ​ | ($) | ​
​ | 2022 | ​ | ​ | $6,850,271 | ​ | ​ | $1,960,305 | ​ | ​ | $1,984,294 | ​ | ​ | $361,791 | ​ | ​ | ($2,119,346) | ​ | ​ | $1,148,117 | ​
​ | 2021 | ​ | ​ | $6,170,131 | ​ | ​ | $1,715,931 | ​ | ​ | $1,396,152 | ​ | ​ | $2,936,037 | ​ | ​ | $4,575,268 | ​ | ​ | $10,569,353 | ​
​ | 2020 | ​ | ​ | $4,065,061 | ​ | ​ | $1,543,674 | ​ | ​ | $1,340,271 | ​ | ​ | $3,083,060 | ​ | ​ | $5,360,809 | ​ | ​ | $9,624,985 | ​
(a) | The methodology for estimating the fair value of restricted stock unit awards is consistent with the methodology as described in Note 12 “Stock-Based Compensation” of the Notes to Consolidated Financial Statements included in our 2020-2022 Annual Reports on Form 10-K. The methodology for estimating the fair value of stock option awards at each applicable measurement date is consistent with the Black Scholes methodology as described in Note 12 “Stock-Based Compensation” of the Notes to Consolidated Financial Statements included in our 2020-2022 Annual Reports on Form 10-K, with the exception of the expected life assumption. The expected life assumption used in estimating the stock option valuations noted above ranges from 0.85 to 4.02 years.
(b) | The reported value of equity awards represents the grant date fair value of restricted stock unit awards as reported in the “Stock Awards” column of the Summary Compensation Table for each applicable year.
(c) | The reported value of option awards represents the grant date fair value of stock option awards as reported in the “Option Awards” column of the Summary Compensation Table for each applicable year.
(d) | The equity award adjustments incorporate the following additions (or subtractions, as applicable):
(i) | the respective year-end estimated fair value of any equity awards granted in the applicable year that are both outstanding and unvested as of each year; 2022: $1,870,840; 2021: $2,027,364; 2020: $2,996,776
(ii) | the amount of change in estimated fair value as of the end of each applicable year as compared to the prior fiscal year for all awards granted in prior years that remain outstanding and unvested as of each year; 2022: ($780,780); 2021: $673,996; 2020: $443,446
(iii) | for all awards granted in prior years that vest in the applicable year, the amount equal to the change in fair value as of the vesting date compared to the estimated fair value from the prior fiscal year; 2022: ($728,269); 2021: $234,677; 2020: ($357,162)
(e) | The option award adjustments for each applicable year include the addition (or subtraction, as applicable) of the following:
(i) | the respective year-end estimated fair value of any equity awards granted in the applicable year that are both outstanding and unvested as of each year; 2022: $1,816,846; 2021: $1,856,699; 2020: $5,129,591
(ii) | the amount of change in estimated fair value as of the end of each applicable year as compared to the prior fiscal year for all awards granted in prior years that remain outstanding and unvested as of each year; 2022: ($1,904,221); 2021: $2,124,028; 2020: $847,250
(iii) | for all awards granted in prior years that vest in the applicable year, the amount equal to the change in fair value as of the vesting date compared to the estimated fair value from the prior fiscal year; 2022: ($2,031,971); 2021: $594,541; 2020: ($616,032)
Non-PEO NEO Average Total Compensation Amount | $ 2,253,183 | 2,155,166 | 1,722,056
Non-PEO NEO Average Compensation Actually Paid Amount | $ 311,368 | 3,602,524 | 3,711,472
Adjustment to Non-PEO NEO Compensation Footnote [Text Block] |
(2) | The table below outlines the amounts included as additions and deductions in the calculation of compensation actually paid (CAP) for Non-PEO NEOs.
​ | Year | ​ | ​ | Reported Summary Compensation Table Total for Non-PEO | ​ | ​ | Reported Value of Equity Awards | ​ | ​ | Equity Award Adjustments (a) | ​ | ​ | Compensation Actually Paid to Non-PEO NEOs | ​
​ | ($) | ​ | ​ | ($) Stock Awards (b) | ​ | ​ | ($) Option Awards (c) | ​ | ​ | ($) Stock Awards (d) | ​ | ​ | ($) Option Awards (e) | ​ | ​ | ($) | ​
​ | 2022 (f) | ​ | ​ | $2,253,183 | ​ | ​ | $536,076 | ​ | ​ | $542,601 | ​ | ​ | ($29,073) | ​ | ​ | ($834,065) | ​ | ​ | $311,368 | ​
​ | 2021 (g) | ​ | ​ | $2,155,166 | ​ | ​ | $649,769 | ​ | ​ | $428,533 | ​ | ​ | $1,067,878 | ​ | ​ | $1,457,782 | ​ | ​ | $3,602,524 | ​
​ | 2020 (h) | ​ | ​ | $1,722,056 | ​ | ​ | $564,463 | ​ | ​ | $620,423 | ​ | ​ | $1,119,992 | ​ | ​ | $2,054,310 | ​ | ​ | $3,711,472 | ​
(a) | The methodology for estimating the fair value of restricted stock unit awards is consistent with the methodology as described in Note 12 “Stock-Based Compensation” of the Notes to Consolidated Financial Statements included in our 2020-2022 Annual Reports on Form 10-K. The methodology for estimating the fair value of stock option awards at each applicable measurement date is consistent with the Black Scholes methodology as described in Note 12 “Stock-Based Compensation” of the Notes to Consolidated Financial Statements included in our 2020-2022 Annual Reports on Form 10-K, with the exception of the expected life assumption. The expected life assumption used in estimating the stock option valuations noted above ranges from 0.85 to 4.02 years.
(b) | The reported value of equity awards represents the grant date fair value of restricted stock unit awards as reported in the “Stock Awards” column of the Summary Compensation Table for each applicable year.
(c) | The reported value of option awards represents the grant date fair value of stock option awards as reported in the “Option Awards” column of the Summary Compensation Table for each applicable year.
(d) | The equity award adjustments for stock in each applicable year include the addition (or subtraction, as applicable) of the following:
(i) | the respective year-end estimated fair value of any equity awards granted in the applicable year that are both outstanding and unvested as of each year; 2022: $511,609; 2021: $771,458; 2020: $863,429
(ii) | the amount of change in estimated fair value as of the end of each applicable year as compared to the prior fiscal year for all awards granted in prior years that remain outstanding and unvested as of each year; 2022: ($339,626); 2021: $235,855; 2020: $360,228
(iii) | for all awards granted in prior years that vest in the applicable year, the amount equal to the change in fair value as of the vesting date compared to the estimated fair value from the prior fiscal year; 2022: ($201,056); 2021: $60,565; 2020: ($103,665)
(e) | The option award adjustments for each applicable year include the addition (or subtraction, as applicable) of the following:
(i) | the respective year-end estimated fair value of any equity awards granted in the applicable year that are outstanding and unvested as of each year; 2022: $496,813; 2021: $572,479; 2020: $1,477,981
(ii) | the amount of change in estimated fair value as of the end of each applicable year as compared to the prior fiscal year for all awards granted in prior years that remain outstanding and unvested as of each year; 2022: ($795,064); 2021: $731,620; 2020: $760,646
(iii) | for all awards granted in prior years that vest in the applicable year, the amount equal to the change in fair value as of the vesting date compared to the estimated fair value from the prior fiscal year; 2022: ($535,814); 2021: $153,683; 2020: ($184,317)
(f) | For fiscal year 2022, the following NEOs are included in the calculation: Meenal A. Sethna, Ryan K. Stafford, Maggie Chu, and Deepak Nayar
(g) | For fiscal year 2021, the following NEOs are included in the calculation: Meenal A. Sethna, Ryan K. Stafford, Maggie Chu, and Deepak Nayar
(h) | For fiscal year 2020, the following NEOs are included in the calculation: Meenal A. Sethna, Ryan K. Stafford, Matthew J. Cole, and Deepak Nayar
Compensation Actually Paid vs. Total Shareholder Return [Text Block] | The following graphs illustrates the relationship of Compensation Actually Paid (CAP) for our PEO and the average CAP for our Non-PEO NEOs in relationship to our Total Shareholder Return, Net Income and Adjusted EPS (the Company Selected Measure (CSM)). Additionally, the graphs also describe the relationship between our own TSR versus our peer group TSR. Compensation actually paid is influenced by numerous factors, including, but not limited to, share price volatility, new grant issuance and timing of vesting, as well as other factors. |  |
Compensation Actually Paid vs. Net Income [Text Block] | The following graphs illustrates the relationship of Compensation Actually Paid (CAP) for our PEO and the average CAP for our Non-PEO NEOs in relationship to our Total Shareholder Return, Net Income and Adjusted EPS (the Company Selected Measure (CSM)). Additionally, the graphs also describe the relationship between our own TSR versus our peer group TSR. Compensation actually paid is influenced by numerous factors, including, but not limited to, share price volatility, new grant issuance and timing of vesting, as well as other factors. |  |
Compensation Actually Paid vs. Company Selected Measure [Text Block] | The following graphs illustrates the relationship of Compensation Actually Paid (CAP) for our PEO and the average CAP for our Non-PEO NEOs in relationship to our Total Shareholder Return, Net Income and Adjusted EPS (the Company Selected Measure (CSM)). Additionally, the graphs also describe the relationship between our own TSR versus our peer group TSR. Compensation actually paid is influenced by numerous factors, including, but not limited to, share price volatility, new grant issuance and timing of vesting, as well as other factors. |  |
Total Shareholder Return Vs Peer Group [Text Block] | The following graphs illustrates the relationship of Compensation Actually Paid (CAP) for our PEO and the average CAP for our Non-PEO NEOs in relationship to our Total Shareholder Return, Net Income and Adjusted EPS (the Company Selected Measure (CSM)). Additionally, the graphs also describe the relationship between our own TSR versus our peer group TSR. Compensation actually paid is influenced by numerous factors, including, but not limited to, share price volatility, new grant issuance and timing of vesting, as well as other factors. |  |
Tabular List [Table Text Block] | The most important Financial Performance measures used by the Company to link Compensation Actually Paid to Company Performance for the most recently completed fiscal year for PEO and Non-PEO NEOs are as follows:
(i) | Adjusted Earnings Per Share
(ii) | Corporate Sales
(iii) | Cash from Operations
Total Shareholder Return Amount | $ 118.21 | 167.4 | 134.5
Peer Group Total Shareholder Return Amount | 124.87 | 151.36 | 120.75
Net Income (Loss) | $ 373,300,000 | $ 283,800,000 | $ 130,000,000
Company Selected Measure Amount | $ / shares | 17.26 | 12.88 | 6.23
Expected Life, Minimum | 10 months 6 days |  |
Expected Life, Maximum | 4 years 7 days |  |
PEO Name | David W. Heinzmann |  |
Measure [Axis]: 1 |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Measure Name | Adjusted Earnings Per Share |  |
Measure [Axis]: 2 |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Measure Name | Corporate Sales |  |
Measure [Axis]: 3 |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Measure Name | Cash from Operations |  |
PEO [Member] | Reported Value of Stock Awards [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | $ 1,960,305 | $ 1,715,931 | $ 1,543,674
PEO [Member] | Reported Value of Option Awards [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | 1,984,294 | 1,396,152 | 1,340,271
PEO [Member] | Equity Stock Award Adjustments [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | 361,791 | 2,936,037 | 3,083,060
PEO [Member] | Adjustments for Equity Awards Granted in Applicable Year that are Both Outstanding and Unvested [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | 1,870,840 | 2,027,364 | 2,996,776
PEO [Member] | Adjustments for Equity Award Change in Estimated Fair Value as Applicable Year as Compared to Prior Fiscal Year for Awards Granted in Prior Years Remain Outstanding and Unvested [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | (780,780) | 673,996 | 443,446
PEO [Member] | Adjustments for Equity Awards Granted in Prior Years that vest in Applicable Year [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | (728,269) | 234,677 | (357,162)
PEO [Member] | Equity Option Award Adjustments [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | (2,119,346) | 4,575,268 | 5,360,809
PEO [Member] | Adjustments for Option Awards Granted in Applicable Year that are Both Outstanding and Unvested [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | 1,816,846 | 1,856,699 | 5,129,591
PEO [Member] | Adjustments for Option Award Change in Estimated Fair Value as Applicable Year as Compared to Prior Fiscal Year for Awards Granted in Prior Years Remain Outstanding and Unvested [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | (1,904,221) | 2,124,028 | 847,250
PEO [Member] | Adjustments for Option Awards Granted in Prior Years that vest in Applicable Year [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | (2,031,971) | 594,541 | (616,032)
Non-PEO NEO [Member] | Reported Value of Stock Awards [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | 536,076 | 649,769 | 564,463
Non-PEO NEO [Member] | Reported Value of Option Awards [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | 542,601 | 428,533 | 620,423
Non-PEO NEO [Member] | Equity Stock Award Adjustments [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | (29,073) | 1,067,878 | 1,119,992
Non-PEO NEO [Member] | Adjustments for Equity Awards Granted in Applicable Year that are Both Outstanding and Unvested [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | 511,609 | 771,458 | 863,429
Non-PEO NEO [Member] | Adjustments for Equity Award Change in Estimated Fair Value as Applicable Year as Compared to Prior Fiscal Year for Awards Granted in Prior Years Remain Outstanding and Unvested [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | (339,626) | 235,855 | 360,228
Non-PEO NEO [Member] | Adjustments for Equity Awards Granted in Prior Years that vest in Applicable Year [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | (201,056) | 60,565 | (103,665)
Non-PEO NEO [Member] | Equity Option Award Adjustments [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | (834,065) | 1,457,782 | 2,054,310
Non-PEO NEO [Member] | Adjustments for Option Awards Granted in Applicable Year that are Both Outstanding and Unvested [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | 496,813 | 572,479 | 1,477,981
Non-PEO NEO [Member] | Adjustments for Option Award Change in Estimated Fair Value as Applicable Year as Compared to Prior Fiscal Year for Awards Granted in Prior Years Remain Outstanding and Unvested [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | (795,064) | 731,620 | 760,646
Non-PEO NEO [Member] | Adjustments for Option Awards Granted in Prior Years that vest in Applicable Year [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | $ (535,814) | $ 153,683 | $ (184,317)

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_AdjToCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_AdjToNonPeoNeoCompFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_AdjToPeoCompFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph vi + Details
Name: | ecd_CoSelectedMeasureAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph vi + Details
Name: | ecd_CoSelectedMeasureName
Namespace Prefix: | ecd_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 5 -Subparagraph iii + Details
Name: | ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 5 -Subparagraph ii + Details
Name: | ecd_CompActuallyPaidVsNetIncomeTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 5 -Subparagraph i + Details
Name: | ecd_CompActuallyPaidVsTotalShareholderRtnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph vi + Details
Name: | ecd_MeasureName
Namespace Prefix: | ecd_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_NamedExecutiveOfficersFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iii + Details
Name: | ecd_NonPeoNeoAvgCompActuallyPaidAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph ii + Details
Name: | ecd_NonPeoNeoAvgTotalCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iv + Details
Name: | ecd_PeerGroupIssuersFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iv + Details
Name: | ecd_PeerGroupTotalShareholderRtnAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iii + Details
Name: | ecd_PeoActuallyPaidCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_PeoName
Namespace Prefix: | ecd_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph ii + Details
Name: | ecd_PeoTotalCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 1 + Details
Name: | ecd_PvpTable
Namespace Prefix: | ecd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 1 + Details
Name: | ecd_PvpTableTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 6 + Details
Name: | ecd_TabularListTableTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iv + Details
Name: | ecd_TotalShareholderRtnAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 5 -Subparagraph iv + Details
Name: | ecd_TotalShareholderRtnVsPeerGroupTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Expected maximum term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | lfus_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedTermMaximum
Namespace Prefix: | lfus_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Expected minimum term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | lfus_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedTermMininum
Namespace Prefix: | lfus_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(22)) -URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22595-107794 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(18)) -URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 40 -Section 65 -Paragraph 1 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=126732423&loc=SL123482106-238011 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=124431353&loc=SL124452729-227067 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(5)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(20)) -URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iv)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iii)(A)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(i)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(i)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 9 -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22663-107794 Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iv)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 Reference 17: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(ii)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612 Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22583-107794 Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60B -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126958026&loc=SL5780133-109256 Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 Reference 23: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22658-107794 Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1A -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669619-108580 Reference 25: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8924-108599 Reference 26: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 11 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22694-107794 Reference 27: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 11 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22694-107794 Reference 28: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=109222650&loc=SL51721683-107760 Reference 29: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1B -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669625-108580 Reference 30: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599 Reference 31: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(5)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 Reference 32: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(B)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 Reference 33: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(A)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 Reference 34: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599 Reference 35: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 + Details
Name: | us-gaap_NetIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | ecd_MeasureAxis=1
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_MeasureAxis=2
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_MeasureAxis=3
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_ExecutiveCategoryAxis=ecd_PeoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=lfus_ReportedValueOfStockAwardsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=lfus_ReportedValueOfOptionAwardsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=lfus_EquityStockAwardAdjustmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=lfus_AdjForEquityAwardsGrantedInApplicableYearThatAreBothOutstandingAndUnvestedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=lfus_AdjustmentsForEquityAwardChangeInEstimatedFairValueAsApplicableYearAsComparedToPriorFiscalYearForAwardsGrantedInPriorYearsRemainOutstandingAndUnvestedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=lfus_AdjForEquityAwardsGrantedInPriorYearsThatVestInApplicableYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=lfus_EquityOptionAwardAdjustmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=lfus_AdjForOptionAwardsGrantedInApplicableYearThatAreBothOutstandingAndUnvestedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=lfus_AdjForOptionAwardChangeInEstimatedFairValueAsApplicableYearAsComparedToPriorFiscalYearForAwardsGrantedInPriorYearsRemainOutstandingAndUnvestedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=lfus_AdjForOptionAwardsGrantedInPriorYearsThatVestInApplicableYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_ExecutiveCategoryAxis=ecd_NonPeoNeoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |