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Pay vs Performance Disclosure - USD ($) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Pay vs Performance Disclosure |  |  |  |
Pay vs Performance Disclosure, Table | The following table presents information about our Named Executive Officers’ pay and Company performance for each of the Company’s four most recently completed fiscal years.
PAY VERSUS PERFORMANCE TABLE
|  |  |  |  | Value of Initial Fixed $100 Investment Based On: |  |
Year | Summary Compensation Table Total for CEO ($) (1) | Compensation Actually Paid to CEO ($) (1)(2) | Average Summary Compensation Table Total for Non-CEO NEOs ($) (3) | Average Compensation Actually Paid to Non-CEO NEOs ($) (2)(3) | Total Share- holder Return ($) | 2023 Peer Group Total Share- holder Return ($) (4) | 2022 Peer Group Total Share- holder Return ($) (4) | Net Income ($) (in 000’s) | Operating Income ($) (in 000’s)
2023 | 5,446,752 |  | 3,516,805 |  | 1,113,639 |  | 899,065 |  | 122 |  | 228 |  | 228 |  | 112,290 |  | 176,416 |
2022 | 5,460,198 |  | 2,465,428 |  | 1,094,807 |  | 701,308 |  | 115 |  | 175 |  | 175 |  | 245,580 |  | 323,076 |
2021 | 5,314,351 |  | 8,798,833 |  | 1,133,218 |  | 1,587,300 |  | 134 |  | 213 |  | 212 |  | 261,478 |  | 309,146 |
2020 | 4,810,029 |  | 6,822,876 |  | 1,102,850 |  | 1,423,523 |  | 109 |  | 131 |  | 131 |  | 169,078 |  | 227,438 |
(1) | Represents compensation of Mr. Leathers for all periods presented.
(2) | SEC rules require certain adjustments be made to the Summary Compensation Table totals to determine “compensation actually paid.” The Reconciliation of Compensation Actually Paid Adjustments table below details the applicable adjustments that were made to determine “compensation actually paid” (all amounts are averages for the non-CEO NEOs).
(3) | Compensation of Messrs. Schelble, Johnson, and Steele are included in the average compensation calculations for all periods presented. Messrs. Wikoff and Meisgeier are included in the average compensation calculations for 2023 and Mr. Nordlund is included in the average compensation calculations for 2022, 2021, and 2020.
(4) | In 2023, we selected a new Peer Group in order to more closely align with our benchmarking Peer Group. Our peer group includes companies similar to us in the transportation industry and has the following companies: ArcBest; Covenant Logistics Group; Daseke; Forward Air; Heartland Express; Hub Group; JB Hunt; Knight-Swift Transportation; Landstar System; Marten Transport; Old Dominion Freight Line; Saia; and Schneider National. We added Daseke to our 2023 peer group and removed US Xpress Enterprises, Inc. (acquired by Knight-Swift Transportation in 2023) and Yellow Corporation (ceased operations in 2023) from our 2023 and 2022 peer groups.
Named Executive Officers, Footnote | Represents compensation of Mr. Leathers for all periods presented. Compensation of Messrs. Schelble, Johnson, and Steele are included in the average compensation calculations for all periods presented. Messrs. Wikoff and Meisgeier are included in the average compensation calculations for 2023 and Mr. Nordlund is included in the average compensation calculations for 2022, 2021, and 2020. |  |  |
Peer Group Issuers, Footnote | In 2023, we selected a new Peer Group in order to more closely align with our benchmarking Peer Group. Our peer group includes companies similar to us in the transportation industry and has the following companies: ArcBest; Covenant Logistics Group; Daseke; Forward Air; Heartland Express; Hub Group; JB Hunt; Knight-Swift Transportation; Landstar System; Marten Transport; Old Dominion Freight Line; Saia; and Schneider National. We added Daseke to our 2023 peer group and removed US Xpress Enterprises, Inc. (acquired by Knight-Swift Transportation in 2023) and Yellow Corporation (ceased operations in 2023) from our 2023 and 2022 peer groups. |  |  |
PEO Total Compensation Amount | $ 5,446,752 | $ 5,460,198 | $ 5,314,351 | $ 4,810,029
PEO Actually Paid Compensation Amount | $ 3,516,805 | 2,465,428 | 8,798,833 | 6,822,876
Adjustment To PEO Compensation, Footnote | SEC rules require certain adjustments be made to the Summary Compensation Table totals to determine “compensation actually paid.” The Reconciliation of Compensation Actually Paid Adjustments table below details the applicable adjustments that were made to determine “compensation actually paid” (all amounts are averages for the non-CEO NEOs). The following table reconciles total compensation reported in the Summary Compensation Table to “compensation actually paid” for the CEO and non-CEO NEOs (averaged) over the last four years.
RECONCILIATION OF COMPENSATION ACTUALLY PAID ADJUSTMENTS
Year | Summary Compensation Table “Total” Column ($) | Subtract Summary Compensation Table “Stock Awards” Column ($) | Add Year End Fair Value of Unvested Equity Awards Granted in Year ($) | Add/ (Subtract) Year Over Year Change in Fair Value of Unvested Equity Awards Granted in Prior Years ($) | Add/ (Subtract) Year Over Year Change in Fair Value of Equity Awards Granted in Prior Years that Vested in Year ($) | Subtract Fair Value of Prior Year Equity Awards that Failed to Meet Vesting Conditions in Year ($) | Compensation Actually Paid ($)
CEO
2023 | 5,446,752 |  | (3,600,000) |  | 2,433,079 |  | (1,562,871) |  | 799,845 |  | — |  | 3,516,805 |
2022 | 5,460,198 |  | (3,200,000) |  | 2,507,777 |  | (2,102,923) |  | (199,624) |  | — |  | 2,465,428 |
2021 | 5,314,351 |  | (2,800,000) |  | 4,741,960 |  | 1,288,523 |  | 253,999 |  | — |  | 8,798,833 |
2020 | 4,810,029 |  | (2,800,000) |  | 4,252,764 |  | 302,174 |  | 257,909 |  | — |  | 6,822,876 |
Non-CEO NEOs (Average)
2023 | 1,113,639 |  | (430,000) |  | 343,301 |  | (124,568) |  | 84,891 |  | (88,198) |  | 899,065 |
2022 | 1,094,807 |  | (350,000) |  | 274,289 |  | (287,911) |  | (29,877) |  | — |  | 701,308 |
2021 | 1,133,218 |  | (312,500) |  | 529,187 |  | 195,957 |  | 41,438 |  | — |  | 1,587,300 |
2020 | 1,102,850 |  | (412,500) |  | 626,539 |  | 49,962 |  | 56,672 |  | — |  | 1,423,523 |
Non-PEO NEO Average Total Compensation Amount | $ 1,113,639 | 1,094,807 | 1,133,218 | 1,102,850
Non-PEO NEO Average Compensation Actually Paid Amount | $ 899,065 | 701,308 | 1,587,300 | 1,423,523
Adjustment to Non-PEO NEO Compensation Footnote | SEC rules require certain adjustments be made to the Summary Compensation Table totals to determine “compensation actually paid.” The Reconciliation of Compensation Actually Paid Adjustments table below details the applicable adjustments that were made to determine “compensation actually paid” (all amounts are averages for the non-CEO NEOs). The following table reconciles total compensation reported in the Summary Compensation Table to “compensation actually paid” for the CEO and non-CEO NEOs (averaged) over the last four years.
RECONCILIATION OF COMPENSATION ACTUALLY PAID ADJUSTMENTS
Year | Summary Compensation Table “Total” Column ($) | Subtract Summary Compensation Table “Stock Awards” Column ($) | Add Year End Fair Value of Unvested Equity Awards Granted in Year ($) | Add/ (Subtract) Year Over Year Change in Fair Value of Unvested Equity Awards Granted in Prior Years ($) | Add/ (Subtract) Year Over Year Change in Fair Value of Equity Awards Granted in Prior Years that Vested in Year ($) | Subtract Fair Value of Prior Year Equity Awards that Failed to Meet Vesting Conditions in Year ($) | Compensation Actually Paid ($)
CEO
2023 | 5,446,752 |  | (3,600,000) |  | 2,433,079 |  | (1,562,871) |  | 799,845 |  | — |  | 3,516,805 |
2022 | 5,460,198 |  | (3,200,000) |  | 2,507,777 |  | (2,102,923) |  | (199,624) |  | — |  | 2,465,428 |
2021 | 5,314,351 |  | (2,800,000) |  | 4,741,960 |  | 1,288,523 |  | 253,999 |  | — |  | 8,798,833 |
2020 | 4,810,029 |  | (2,800,000) |  | 4,252,764 |  | 302,174 |  | 257,909 |  | — |  | 6,822,876 |
Non-CEO NEOs (Average)
2023 | 1,113,639 |  | (430,000) |  | 343,301 |  | (124,568) |  | 84,891 |  | (88,198) |  | 899,065 |
2022 | 1,094,807 |  | (350,000) |  | 274,289 |  | (287,911) |  | (29,877) |  | — |  | 701,308 |
2021 | 1,133,218 |  | (312,500) |  | 529,187 |  | 195,957 |  | 41,438 |  | — |  | 1,587,300 |
2020 | 1,102,850 |  | (412,500) |  | 626,539 |  | 49,962 |  | 56,672 |  | — |  | 1,423,523 |
Compensation Actually Paid vs. Total Shareholder Return | The following graphs illustrate the relationships between each of the financial performance measures included in the Pay Versus Performance Table above and the compensation actually paid to the CEO and, on average, to non-CEO NEOs over the Company’s four most recently completed fiscal years. |  |  |
Compensation Actually Paid vs. Net Income |  |  |  |
Compensation Actually Paid vs. Company Selected Measure |  |  |  |
Total Shareholder Return Vs Peer Group | The following graphs illustrate the relationships between each of the financial performance measures included in the Pay Versus Performance Table above and the compensation actually paid to the CEO and, on average, to non-CEO NEOs over the Company’s four most recently completed fiscal years. |  |  |
Total Shareholder Return Amount | $ 122 | 115 | 134 | 109
Peer Group Total Shareholder Return Amount | 228 | 175 | 213 | 131
Net Income (Loss) | $ 112,290,000 | $ 245,580,000 | $ 261,478,000 | $ 169,078,000
Company Selected Measure Amount | 176,416,000 | 323,076,000 | 309,146,000 | 227,438,000
PEO Name | Mr. Leathers |  |  |
Peer Group Total Shareholder Return Amount, Other Peer Group | $ 228 | $ 175 | $ 212 | $ 131
Measure:: 1 |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Name | •Revenues, less fuel surcharge revenues |  |  |
Measure:: 2 |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Name | •Operating income |  |  |
Measure:: 3 |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Name | Diluted earnings per share |  |  |
PEO | Stock Awards Adjustment [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | $ (3,600,000) | (3,200,000) | (2,800,000) | (2,800,000)
PEO | Equity Awards Granted in Current Year, Fair Value Adjustment [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 2,433,079 | 2,507,777 | 4,741,960 | 4,252,764
PEO | Equity Awards Adjustment, Unvested, Granted in Prior Years [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (1,562,871) | (2,102,923) | 1,288,523 | 302,174
PEO | Equity Awards Adjustment, Vested, Granted in Prior Years [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 799,845 | (199,624) | 253,999 | 257,909
PEO | Equity Awards that Failed to Meet Vesting Conditions [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 0 | 0 | 0 | 0
Non-PEO NEO | Stock Awards Adjustment [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (430,000) | (350,000) | (312,500) | (412,500)
Non-PEO NEO | Equity Awards Granted in Current Year, Fair Value Adjustment [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 343,301 | 274,289 | 529,187 | 626,539
Non-PEO NEO | Equity Awards Adjustment, Unvested, Granted in Prior Years [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (124,568) | (287,911) | 195,957 | 49,962
Non-PEO NEO | Equity Awards Adjustment, Vested, Granted in Prior Years [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 84,891 | (29,877) | 41,438 | 56,672
Non-PEO NEO | Equity Awards that Failed to Meet Vesting Conditions [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | $ (88,198) | $ 0 | $ 0 | $ 0

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