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Pay vs Performance Disclosure | 12 Months Ended
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Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Pay vs Performance [Table Text Block] |  | ## PAY VERSUS PERFORMANCE The following table sets forth the pay versus performance disclosures required by Section 953(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act and Item 402(v) of Regulation S-K for the years indicated. Ms. McReynolds served as Principal Executive Officer (“PEO”) in each year. The names of the non-PEO Named Executive Officers (the “Non-PEO NEOs”) included for purposes of calculating the average amounts in each covered year are as follows: (i) for 2023, J. Matthew Beasley, Seth K. Runser, Dennis L. Anderson II, Michael E. Newcity and David R. Cobb; (ii) for 2022, David R. Cobb, Michael E. Newcity, Seth K. Runser, Daniel E. Loe and Dennis L. Anderson II; (iii) for 2021, David R. Cobb, Michael E. Newcity, James A. Ingram and Dennis L. Anderson II; and (iv) for 2020, Timothy D. Thorne, David R. Cobb, Michael E. Newcity and James A. Ingram. The dollar amounts for Compensation Actually Paid (“CAP”) do not reflect the actual amount of compensation earned by or paid to the Named Executive Officers during the covered year. Please refer to the Compensation Discussion & Analysis section in this Proxy Statement and in our previous proxy statements for information about how the Compensation Committee has assessed the Company’s performance and Named Executive Officer compensation in a given year.
|  |  |  |  |  |  |  |  |  | Value of Initial Fixed $100 Investment Based On: |  |  |  | Return on Capital Employed (Adjusted ROCE)
Year (a) |  | Summary Compensation Table Total for PEO (b) |  | Compensation Actually Paid to PEO(1) (c) |  | Average Summary Compensation Table Total for Non-PEO NEOs (d) |  | Average Compensation Actually Paid to Non-PEO NEOs(1) (e) |  | Total Shareholder Return(2) (f) |  | Peer Group Total Shareholder Return(3) (g) |  | Net Income (millions)(4) (h) |  | 1 Year(5) (i) |  | Average 3 Year(5) (j)
2023 |  | 6,315,108 |  | 10,548,681 |  | 1,737,578 |  | 2,508,269 |  | 447.38 |  | 235.83 |  | 195.43 |  | 20.1% |  | 28.6%
2022 |  | 6,430,893 |  | 384,908 |  | 2,097,211 |  | 342,776 |  | 259.47 |  | 180.19 |  | 298.21 |  | 39.9% |  | 26.7%
2021 |  | 6,006,289 |  | 16,582,019 |  | 2,131,000 |  | 5,779,949 |  | 441.63 |  | 216.63 |  | 213.52 |  | 34.8% |  | 19.4%
2020 |  | 4,174,608 |  | 6,594,027 |  | 1,648,558 |  | 2,599,276 |  | 156.55 |  | 130.88 |  | 71.10 |  | 15.4% |  | 11.7%
(1) | Reflects the CAP for the PEO and the average CAP for the Non-PEO NEOs for the covered years, as computed in accordance with Item 402(v) of Regulation S-K. The following adjustments were made to the Summary Compensation Table total compensation to determine the CAP:
(2) | Total Shareholder Return (TSR) is calculated assuming $100 was invested on December 31, 2019, with reinvestment of dividends. All calculations have been prepared by Zacks Investment Research, Inc.
(3) | The 2023 peer group includes the following companies: Covenant Logistics Group, Inc., Forward Air Corporation, Hub Group, Inc., J.B. Hunt Transport Services, Inc., Knight-Swift Transportation Holdings, Inc., Landstar System, Inc., Old Dominion Freight Line, Inc., Saia, Inc., Schneider National, Inc., TFI International Inc., and Werner Enterprises, Inc. Our 2023 peer group is identical to our 2022 peer group, except that, for 2023, U.S. Xpress Enterprises, Inc. was removed due to its acquisition by Knight-Swift Transportation Holdings, Inc., and Yellow Corporation was removed due to its Chapter 11 bankruptcy filing and subsequent delisting from Nasdaq. The following table sets forth the TSR for the 2022 peer group for each of the four years reported:
(4) | Net income as reported in the Company’s audited financial statements for each covered year, which includes, for the applicable years, income from discontinued operations.
(5) | Reflects the one-year and three-year average Adjusted ROCE of the Company as approved by the Compensation Committee for purposes of the Company’s annual cash incentive compensation plan and long-term cash incentive compensation plan for each covered year. The Company has determined that one-year Adjusted ROCE as used in its annual cash incentive compensation plan is the financial performance measure that, in the Company’s assessment, represents the most important performance measure (that is not otherwise required to be disclosed in the table) used by the Company to link CAP to the Named Executive Officers, for the most recently completed fiscal year, to Company performance. Because the Company uses three-year average Adjusted ROCE in its long-term cash incentive program as discussed in greater detail in “Compensation Discussion & Analysis — Components of Compensation — Long-Term Incentive Compensation,” the Company is providing, on a supplemental basis, its three-year average Adjusted ROCE for each covered year. For more information, see the section below titled “Financial Performance Measures.”
The following table sets forth the pay versus performance disclosures required by Section 953(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act and Item 402(v) of Regulation S-K for the years indicated. Ms. McReynolds served as Principal Executive Officer (“PEO”) in each year. The names of the non-PEO Named Executive Officers (the “Non-PEO NEOs”) included for purposes of calculating the average amounts in each covered year are as follows: (i) for 2023, J. Matthew Beasley, Seth K. Runser, Dennis L. Anderson II, Michael E. Newcity and David R. Cobb; (ii) for 2022, David R. Cobb, Michael E. Newcity, Seth K. Runser, Daniel E. Loe and Dennis L. Anderson II; (iii) for 2021, David R. Cobb, Michael E. Newcity, James A. Ingram and Dennis L. Anderson II; and (iv) for 2020, Timothy D. Thorne, David R. Cobb, Michael E. Newcity and James A. Ingram.
(1) | Reflects the CAP for the PEO and the average CAP for the Non-PEO NEOs for the covered years, as computed in accordance with Item 402(v) of Regulation S-K. The following adjustments were made to the Summary Compensation Table total compensation to determine the CAP:
Year |  | Reported Summary Compensation Table Total(i) A |  | Reported Value of Equity Awards(ii) B |  | Equity Award Adjustments(iii) C |  | Reported Change in the Actuarial Present Value of Pension Benefits(iv) D |  | Pension Benefit Adjustments(v) E |  | Compensation Actually Paid A-B+C-D+E
Company’s PEO |  |  |  |  |  |  |  |  |  |
2023 |  | 6,315,108 |  | 1,227,732 |  | 5,470,769 |  | 9,464 |  | - |  | 10,548,681
Average of Non-PEO NEOs |  |  |  |  |  |  |  |  |  |
2023 |  | 1,737,578 |  | 229,984 |  | 1,000,675 |  | - |  | - |  | 2,508,269
| (i) | Reflects the amounts (or the average amounts for the Non-PEO NEOs) reported in the “Total” column of the Summary Compensation Table for the covered year.
| (ii) | Reflects the grant date fair value of equity awards granted to the PEO (or the average amounts with regard to the Non-PEO NEOs) as reported in the “Stock Awards” column in the Summary Compensation Table for the covered year.
| (iii) | The equity award adjustments for the covered year include the addition (or subtraction, as applicable) as set forth in the table below. The fair values of equity awards were calculated using closing stock price as of the applicable valuation dates and are not adjusted for present value of dividends (which are not payable with respect to RSUs granted to Named Executive Officers).
| (iv) | Reflects the amounts reported in the “Change in Pension Value and Nonqualified Deferred Compensation Earnings” column of the Summary Compensation Table for the covered years.
| (v) | These amounts reflect the actuarially determined service cost for services rendered during the applicable year. The Company’s legacy non-contractual defined benefit pension plan was terminated effective December 31, 2017, and fully liquidated as of December 31, 2019. Therefore, no services costs were incurred in any of the covered years.
Year |  | Year End Fair Value of Equity Awards Granted During the Fiscal Year |  | Year over Year Change in Fair Value of Outstanding and Unvested Equity Awards |  | Year over Year Change in Fair Value of Equity Awards Granted in Prior Years that Vested in the Year |  | Fair value of forfeited awards at end of prior year |  | Total Equity Award Adjustments
Company’s PEO |  |  |  |  |  |  |  |
2023 |  | 1,706,982 |  | 3,219,258 |  | 544,529 |  | - |  | 5,470,769
Average of Non-PEO NEOs |  |  |  |  |  |  |  |
2023 |  | 319,759 |  | 532,825 |  | 233,554 |  | (85,463) |  | 1,000,675
| (iv) | Reflects the amounts reported in the “Change in Pension Value and Nonqualified Deferred Compensation Earnings” column of the Summary Compensation Table for the covered years.
| (v) | These amounts reflect the actuarially determined service cost for services rendered during the applicable year. The Company’s legacy non-contractual defined benefit pension plan was terminated effective December 31, 2017, and fully liquidated as of December 31, 2019. Therefore, no services costs were incurred in any of the covered years.
(2) | Total Shareholder Return (TSR) is calculated assuming $100 was invested on December 31, 2019, with reinvestment of dividends. All calculations have been prepared by Zacks Investment Research, Inc.
(3) | The 2023 peer group includes the following companies: Covenant Logistics Group, Inc., Forward Air Corporation, Hub Group, Inc., J.B. Hunt Transport Services, Inc., Knight-Swift Transportation Holdings, Inc., Landstar System, Inc., Old Dominion Freight Line, Inc., Saia, Inc., Schneider National, Inc., TFI International Inc., and Werner Enterprises, Inc. Our 2023 peer group is identical to our 2022 peer group, except that, for 2023, U.S. Xpress Enterprises, Inc. was removed due to its acquisition by Knight-Swift Transportation Holdings, Inc., and Yellow Corporation was removed due to its Chapter 11 bankruptcy filing and subsequent delisting from Nasdaq. The following table sets forth the TSR for the 2022 peer group for each of the four years reported:
Year |  | 2022 Peer Group Total Shareholder Return
2023 |  | 235.23
2022 |  | 179.25
2021 |  | 216.77
2020 |  | 130.97
(4) | Net income as reported in the Company’s audited financial statements for each covered year, which includes, for the applicable years, income from discontinued operations.
(5) | Reflects the one-year and three-year average Adjusted ROCE of the Company as approved by the Compensation Committee for purposes of the Company’s annual cash incentive compensation plan and long-term cash incentive compensation plan for each covered year. The Company has determined that one-year Adjusted ROCE as used in its annual cash incentive compensation plan is the financial performance measure that, in the Company’s assessment, represents the most important performance measure (that is not otherwise required to be disclosed in the table) used by the Company to link CAP to the Named Executive Officers, for the most recently completed fiscal year, to Company performance. Because the Company uses three-year average Adjusted ROCE in its long-term cash incentive program as discussed in greater detail in “Compensation Discussion & Analysis — Components of Compensation — Long-Term Incentive Compensation,” the Company is providing, on a supplemental basis, its three-year average Adjusted ROCE for each covered year. For more information, see the section below titled “Financial Performance Measures.”
Company Selected Measure Name |  | Adjusted ROCE |  |  |  |
Named Executive Officers, Footnote [Text Block] |  | The following table sets forth the pay versus performance disclosures required by Section 953(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act and Item 402(v) of Regulation S-K for the years indicated. Ms. McReynolds served as Principal Executive Officer (“PEO”) in each year. The names of the non-PEO Named Executive Officers (the “Non-PEO NEOs”) included for purposes of calculating the average amounts in each covered year are as follows: (i) for 2023, J. Matthew Beasley, Seth K. Runser, Dennis L. Anderson II, Michael E. Newcity and David R. Cobb; (ii) for 2022, David R. Cobb, Michael E. Newcity, Seth K. Runser, Daniel E. Loe and Dennis L. Anderson II; (iii) for 2021, David R. Cobb, Michael E. Newcity, James A. Ingram and Dennis L. Anderson II; and (iv) for 2020, Timothy D. Thorne, David R. Cobb, Michael E. Newcity and James A. Ingram. |  |  |  |
Changed Peer Group, Footnote [Text Block] |  |
(3) | The 2023 peer group includes the following companies: Covenant Logistics Group, Inc., Forward Air Corporation, Hub Group, Inc., J.B. Hunt Transport Services, Inc., Knight-Swift Transportation Holdings, Inc., Landstar System, Inc., Old Dominion Freight Line, Inc., Saia, Inc., Schneider National, Inc., TFI International Inc., and Werner Enterprises, Inc. Our 2023 peer group is identical to our 2022 peer group, except that, for 2023, U.S. Xpress Enterprises, Inc. was removed due to its acquisition by Knight-Swift Transportation Holdings, Inc., and Yellow Corporation was removed due to its Chapter 11 bankruptcy filing and subsequent delisting from Nasdaq. The following table sets forth the TSR for the 2022 peer group for each of the four years reported:
PEO Total Compensation Amount |  | $ 6,315,108 | [1] | $ 6,430,893 | $ 6,006,289 | $ 4,174,608
PEO Actually Paid Compensation Amount | [2] | $ 10,548,681 |  | 384,908 | 16,582,019 | 6,594,027
Adjustment To PEO Compensation, Footnote [Text Block] |  |
Year |  | Reported Summary Compensation Table Total(i) A |  | Reported Value of Equity Awards(ii) B |  | Equity Award Adjustments(iii) C |  | Reported Change in the Actuarial Present Value of Pension Benefits(iv) D |  | Pension Benefit Adjustments(v) E |  | Compensation Actually Paid A-B+C-D+E
Company’s PEO |  |  |  |  |  |  |  |  |  |
2023 |  | 6,315,108 |  | 1,227,732 |  | 5,470,769 |  | 9,464 |  | - |  | 10,548,681
Average of Non-PEO NEOs |  |  |  |  |  |  |  |  |  |
2023 |  | 1,737,578 |  | 229,984 |  | 1,000,675 |  | - |  | - |  | 2,508,269
| (i) | Reflects the amounts (or the average amounts for the Non-PEO NEOs) reported in the “Total” column of the Summary Compensation Table for the covered year.
| (ii) | Reflects the grant date fair value of equity awards granted to the PEO (or the average amounts with regard to the Non-PEO NEOs) as reported in the “Stock Awards” column in the Summary Compensation Table for the covered year.
| (iii) | The equity award adjustments for the covered year include the addition (or subtraction, as applicable) as set forth in the table below. The fair values of equity awards were calculated using closing stock price as of the applicable valuation dates and are not adjusted for present value of dividends (which are not payable with respect to RSUs granted to Named Executive Officers).
| (iv) | Reflects the amounts reported in the “Change in Pension Value and Nonqualified Deferred Compensation Earnings” column of the Summary Compensation Table for the covered years.
| (v) | These amounts reflect the actuarially determined service cost for services rendered during the applicable year. The Company’s legacy non-contractual defined benefit pension plan was terminated effective December 31, 2017, and fully liquidated as of December 31, 2019. Therefore, no services costs were incurred in any of the covered years.
Year |  | Year End Fair Value of Equity Awards Granted During the Fiscal Year |  | Year over Year Change in Fair Value of Outstanding and Unvested Equity Awards |  | Year over Year Change in Fair Value of Equity Awards Granted in Prior Years that Vested in the Year |  | Fair value of forfeited awards at end of prior year |  | Total Equity Award Adjustments
Company’s PEO |  |  |  |  |  |  |  |
2023 |  | 1,706,982 |  | 3,219,258 |  | 544,529 |  | - |  | 5,470,769
Average of Non-PEO NEOs |  |  |  |  |  |  |  |
2023 |  | 319,759 |  | 532,825 |  | 233,554 |  | (85,463) |  | 1,000,675
| (iv) | Reflects the amounts reported in the “Change in Pension Value and Nonqualified Deferred Compensation Earnings” column of the Summary Compensation Table for the covered years.
| (v) | These amounts reflect the actuarially determined service cost for services rendered during the applicable year. The Company’s legacy non-contractual defined benefit pension plan was terminated effective December 31, 2017, and fully liquidated as of December 31, 2019. Therefore, no services costs were incurred in any of the covered years.
Non-PEO NEO Average Total Compensation Amount |  | $ 1,737,578 | [1] | 2,097,211 | 2,131,000 | 1,648,558
Non-PEO NEO Average Compensation Actually Paid Amount | [2] | $ 2,508,269 |  | 342,776 | 5,779,949 | 2,599,276
Adjustment to Non-PEO NEO Compensation Footnote [Text Block] |  |
Year |  | Reported Summary Compensation Table Total(i) A |  | Reported Value of Equity Awards(ii) B |  | Equity Award Adjustments(iii) C |  | Reported Change in the Actuarial Present Value of Pension Benefits(iv) D |  | Pension Benefit Adjustments(v) E |  | Compensation Actually Paid A-B+C-D+E
Company’s PEO |  |  |  |  |  |  |  |  |  |
2023 |  | 6,315,108 |  | 1,227,732 |  | 5,470,769 |  | 9,464 |  | - |  | 10,548,681
Average of Non-PEO NEOs |  |  |  |  |  |  |  |  |  |
2023 |  | 1,737,578 |  | 229,984 |  | 1,000,675 |  | - |  | - |  | 2,508,269
| (i) | Reflects the amounts (or the average amounts for the Non-PEO NEOs) reported in the “Total” column of the Summary Compensation Table for the covered year.
| (ii) | Reflects the grant date fair value of equity awards granted to the PEO (or the average amounts with regard to the Non-PEO NEOs) as reported in the “Stock Awards” column in the Summary Compensation Table for the covered year.
| (iii) | The equity award adjustments for the covered year include the addition (or subtraction, as applicable) as set forth in the table below. The fair values of equity awards were calculated using closing stock price as of the applicable valuation dates and are not adjusted for present value of dividends (which are not payable with respect to RSUs granted to Named Executive Officers).
| (iv) | Reflects the amounts reported in the “Change in Pension Value and Nonqualified Deferred Compensation Earnings” column of the Summary Compensation Table for the covered years.
| (v) | These amounts reflect the actuarially determined service cost for services rendered during the applicable year. The Company’s legacy non-contractual defined benefit pension plan was terminated effective December 31, 2017, and fully liquidated as of December 31, 2019. Therefore, no services costs were incurred in any of the covered years.
Year |  | Year End Fair Value of Equity Awards Granted During the Fiscal Year |  | Year over Year Change in Fair Value of Outstanding and Unvested Equity Awards |  | Year over Year Change in Fair Value of Equity Awards Granted in Prior Years that Vested in the Year |  | Fair value of forfeited awards at end of prior year |  | Total Equity Award Adjustments
Company’s PEO |  |  |  |  |  |  |  |
2023 |  | 1,706,982 |  | 3,219,258 |  | 544,529 |  | - |  | 5,470,769
Average of Non-PEO NEOs |  |  |  |  |  |  |  |
2023 |  | 319,759 |  | 532,825 |  | 233,554 |  | (85,463) |  | 1,000,675
| (iv) | Reflects the amounts reported in the “Change in Pension Value and Nonqualified Deferred Compensation Earnings” column of the Summary Compensation Table for the covered years.
| (v) | These amounts reflect the actuarially determined service cost for services rendered during the applicable year. The Company’s legacy non-contractual defined benefit pension plan was terminated effective December 31, 2017, and fully liquidated as of December 31, 2019. Therefore, no services costs were incurred in any of the covered years.
Compensation Actually Paid vs. Total Shareholder Return [Text Block] |  | The following graph compares the CAP to Ms. McReynolds and the average amount of CAP to the Non-PEO NEOs with the Company’s cumulative TSR and the peer group TSR over the four years presented. TSR is calculated assuming $100 was invested on December 31, 2019, with reinvestment of dividends. The Company’s cumulative TSR over the four-year period was $447.38, while the cumulative TSR of the peer group was $235.83 over the same period. CAP VS. COMPANY TSR AND PEER GROUP TSR |  |  |  |
Compensation Actually Paid vs. Net Income [Text Block] |  | The following graph compares the CAP to Ms. McReynolds and the average amount of CAP to the Non-PEO NEOs with our net income over the four years presented. While we do not use net income as a compensation performance metric in our executive compensation program, the measure of net income may correlate to Adjusted Operating Income, which we use in our AIP. Because a significant portion of CAP is comprised of equity awards, which have multi-year vesting periods, CAP is more heavily impacted by fluctuations in stock price year-over-year, as compared to net income. CAP VS. NET INCOME |  |  |  |
Compensation Actually Paid vs. Company Selected Measure [Text Block] |  | The following graph compares the CAP to Ms. McReynolds and the average amount of CAP to the Non-PEO NEOs with (i) our one-year Adjusted ROCE, calculated in accordance with our AIP, and (ii) on a supplemental basis, the average three-year Adjusted ROCE, calculated in accordance with our C-LTIP program, each over the four years presented. While the Company uses several financial performance measures to evaluate performance for purposes of its executive compensation program, the Company has determined that one-year Adjusted ROCE as used in the AIP is the financial performance measure that, in the Company’s assessment, represents the most important performance measure (that is not otherwise required to be disclosed in the table) used by the Company to link CAP to the Named Executive Officers, for the most recently completed fiscal year, to Company performance. CAP VS. ANNUAL AND THREE-YEAR AVERAGE ROCE |  |  |  |
Total Shareholder Return Vs Peer Group [Text Block] |  | The following graph compares the CAP to Ms. McReynolds and the average amount of CAP to the Non-PEO NEOs with the Company’s cumulative TSR and the peer group TSR over the four years presented. TSR is calculated assuming $100 was invested on December 31, 2019, with reinvestment of dividends. The Company’s cumulative TSR over the four-year period was $447.38, while the cumulative TSR of the peer group was $235.83 over the same period. CAP VS. COMPANY TSR AND PEER GROUP TSR |  |  |  |
Tabular List [Table Text Block] |  | #### Financial Performance Measures As described in greater detail in “Executive Compensation — Compensation Discussion & Analysis,” the Company’s executive compensation program reflects a variable pay-for-performance philosophy. The financial performance measures set forth in the table below (in unranked order), in the Company’s assessment, represent the most important financial performance measures used by the Company to link CAP to the Company’s named executive officers, for the most recently completed fiscal year, to the Company’s performance. The measures are utilized in our annual incentive compensation plan (“AIP”) and our cash long-term incentive compensation plan (“C-LTIP”) and are designed with the objective of aligning the executives’ interests with those of the Company’s stockholders.
Performance Measure |  | Compensation Weighting |  | For More Information
Adjusted Operating Income |  | 50% of AIP |  | Page 42
Adjusted ROCE |  | 50% of AIP |  | Page 42
Relative TSR |  | 50% of C-LTIP |  | Page 44
Average Adjusted ROCE for the three-year performance period |  | 50% of C-LTIP |  | Page 44
Total Shareholder Return Amount | [3] | $ 447.38 |  | 259.47 | 441.63 | 156.55
Peer Group Total Shareholder Return Amount | [4] | 235.83 |  | 180.19 | 216.63 | 130.88
Net Income (Loss) Attributable to Parent | [5] | $ 195,430,000 |  | $ 298,210,000 | $ 213,520,000 | $ 71,100,000
Company Selected Measure Amount | [6] | 20.1 |  | 39.9 | 34.8 | 15.4
Company Selected Measure Amount 1 | [6] | 28.6 |  | 26.7 | 19.4 | 11.7
Measure [Axis]: 1 |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Measure Name |  | Adjusted Operating Income |  |  |  |
Measure [Axis]: 2 |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Measure Name |  | Adjusted ROCE |  |  |  |
Measure [Axis]: 3 |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Measure Name |  | Relative TSR |  |  |  |
Measure [Axis]: 4 |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Measure Name |  | Average Adjusted ROCE for the three-year performance period |  |  |  |
PEO [Member] | Reported Value of Equity Awards |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount | [7] | $ (1,227,732) |  |  |  |
PEO [Member] | Equity Award Adjustments |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount | [8] | 5,470,769 |  |  |  |
PEO [Member] | Reported Change in the Actuarial Present Value of Pension Benefits |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount | [9] | (9,464) |  |  |  |
PEO [Member] | Pension Benefit Adjustments |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount | [10] |  |  |  |  |
PEO [Member] | Year End Fair Value of Equity Awards Granted During the Fiscal Year |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount |  | 1,706,982 |  |  |  |
PEO [Member] | Year over Year Change in Fair Value of Outstanding and Unvested Equity Awards |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount |  | 3,219,258 |  |  |  |
PEO [Member] | Year over Year Change in Fair Value of Equity Awards Granted in Prior Years that Vested in the Year |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount |  | 544,529 |  |  |  |
PEO [Member] | Fair value of forfeited awards at end of prior year |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount |  |  |  |  |  |
PEO [Member] | Total Equity Award Adjustments |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount |  | $ 5,470,769 |  |  |  |
PEO [Member] | Ms. McReynolds |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
PEO Name |  | Ms. McReynolds |  | Ms. McReynolds | Ms. McReynolds | Ms. McReynolds
Non-PEO NEO [Member] | Reported Value of Equity Awards |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount | [7] | $ (229,984) |  |  |  |
Non-PEO NEO [Member] | Equity Award Adjustments |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount | [8] | 1,000,675 |  |  |  |
Non-PEO NEO [Member] | Reported Change in the Actuarial Present Value of Pension Benefits |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount | [9] |  |  |  |  |
Non-PEO NEO [Member] | Pension Benefit Adjustments |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount | [10] |  |  |  |  |
Non-PEO NEO [Member] | Year End Fair Value of Equity Awards Granted During the Fiscal Year |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount |  | 319,759 |  |  |  |
Non-PEO NEO [Member] | Year over Year Change in Fair Value of Outstanding and Unvested Equity Awards |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount |  | 532,825 |  |  |  |
Non-PEO NEO [Member] | Year over Year Change in Fair Value of Equity Awards Granted in Prior Years that Vested in the Year |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount |  | 233,554 |  |  |  |
Non-PEO NEO [Member] | Fair value of forfeited awards at end of prior year |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount |  | (85,463) |  |  |  |
Non-PEO NEO [Member] | Total Equity Award Adjustments |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount |  | $ 1,000,675 |  |  |  |
[1] | Reflects the amounts (or the average amounts for the Non-PEO NEOs) reported in the “Total” column of the Summary Compensation Table for the covered year.
[2] | Reflects the CAP for the PEO and the average CAP for the Non-PEO NEOs for the covered years, as computed in accordance with Item 402(v) of Regulation S-K. The following adjustments were made to the Summary Compensation Table total compensation to determine the CAP:
[3] | Total Shareholder Return (TSR) is calculated assuming $100 was invested on December 31, 2019, with reinvestment of dividends. All calculations have been prepared by Zacks Investment Research, Inc.
[4] | The 2023 peer group includes the following companies: Covenant Logistics Group, Inc., Forward Air Corporation, Hub Group, Inc., J.B. Hunt Transport Services, Inc., Knight-Swift Transportation Holdings, Inc., Landstar System, Inc., Old Dominion Freight Line, Inc., Saia, Inc., Schneider National, Inc., TFI International Inc., and Werner Enterprises, Inc. Our 2023 peer group is identical to our 2022 peer group, except that, for 2023, U.S. Xpress Enterprises, Inc. was removed due to its acquisition by Knight-Swift Transportation Holdings, Inc., and Yellow Corporation was removed due to its Chapter 11 bankruptcy filing and subsequent delisting from Nasdaq. The following table sets forth the TSR for the 2022 peer group for each of the four years reported:
[5] | Net income as reported in the Company’s audited financial statements for each covered year, which includes, for the applicable years, income from discontinued operations.
[6] | Reflects the one-year and three-year average Adjusted ROCE of the Company as approved by the Compensation Committee for purposes of the Company’s annual cash incentive compensation plan and long-term cash incentive compensation plan for each covered year. The Company has determined that one-year Adjusted ROCE as used in its annual cash incentive compensation plan is the financial performance measure that, in the Company’s assessment, represents the most important performance measure (that is not otherwise required to be disclosed in the table) used by the Company to link CAP to the Named Executive Officers, for the most recently completed fiscal year, to Company performance. Because the Company uses three-year average Adjusted ROCE in its long-term cash incentive program as discussed in greater detail in “Compensation Discussion & Analysis — Components of Compensation — Long-Term Incentive Compensation,” the Company is providing, on a supplemental basis, its three-year average Adjusted ROCE for each covered year. For more information, see the section below titled “Financial Performance Measures.”
[7] | Reflects the grant date fair value of equity awards granted to the PEO (or the average amounts with regard to the Non-PEO NEOs) as reported in the “Stock Awards” column in the Summary Compensation Table for the covered year.
[8] | The equity award adjustments for the covered year include the addition (or subtraction, as applicable) as set forth in the table below. The fair values of equity awards were calculated using closing stock price as of the applicable valuation dates and are not adjusted for present value of dividends (which are not payable with respect to RSUs granted to Named Executive Officers).
[9] | Reflects the amounts reported in the “Change in Pension Value and Nonqualified Deferred Compensation Earnings” column of the Summary Compensation Table for the covered years.
[10] | These amounts reflect the actuarially determined service cost for services rendered during the applicable year. The Company’s legacy non-contractual defined benefit pension plan was terminated effective December 31, 2017, and fully liquidated as of December 31, 2019. Therefore, no services costs were incurred in any of the covered years.

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