Significant Accounting Policies (Policies)	9 Months Ended
Sep. 30, 2025
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	Basis of Presentation The accompanying unaudited interim Condensed Consolidated Financial Statements have been prepared in accordance with U.S. generally accepted accounting principles (GAAP) for interim financial information. We believe such statements include all adjustments (consisting only of normal recurring adjustments) necessary for the fair statement of our financial position, results of operations and cash flows at the dates and for the periods indicated. Pursuant to the requirements of the Securities and Exchange Commission (SEC) applicable to quarterly reports on Form 10-Q, the accompanying financial statements do not include all disclosures required by GAAP for annual financial statements. While we believe the disclosures presented are adequate to make the information not misleading, these unaudited interim Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and related notes included in our Annual Report on Form 10-K for the year ended December 31, 2024. Operating results for the periods presented in this report are not necessarily indicative of the results that may be expected for the calendar year ending December 31, 2025, or any other interim period. Our business is somewhat seasonal with slightly higher freight volumes typically experienced during August through early November in our full-load freight transportation business.
New Accounting Pronouncements, Policy [Policy Text Block]	Recent Accounting Pronouncements In December 2023, the Financial Accounting Standards Board (FASB) issued ASU 2023-09, Income Taxes: Improvements to Income Tax Disclosures, which enhances income tax disclosures to provide more transparency about income tax information, primarily related to the rate reconciliation and income taxes paid by jurisdiction information. These disclosures will include consistent categories and greater disaggregation of information in the rate reconciliation and require income taxes paid to be disaggregated by jurisdiction as well as additional amendments to improve the effectiveness of income tax disclosures. The new standard became effective prospectively for us on January 1, 2025, for annual periods, with retrospective adoption permitted. We do not anticipate the adoption of this accounting pronouncement to have a material impact on our financial statements. In November 2024, the FASB issued ASU 2024-03, Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures, which requires public business entities to disclose, on an annual and interim basis, disaggregated information about certain income statement expense line items in the notes to the financial statements. The standard becomes effective prospectively for us on January 1, 2027, for annual periods, and January 1, 2028, for interim periods, with retrospective adoption permitted. We are currently evaluating the impact of the adoption of this accounting pronouncement on our financial statements. In September 2025, the FASB issued ASU 2025-06, Intangibles - Goodwill and Other - Internal-Use Software: Targeted Improvements to the Accounting for Internal-Use Software, which clarified and modernizes the accounting for costs related to internal-use software. The amendments in the standard remove all previous references to project stages and clarify the threshold entities apply to begin capitalizing costs. The standard becomes effective for us on January 1, 2028, for annual and interim periods and may be adopted on a prospective basis, a modified basis for in-process projects, or a retrospective basis. We are currently evaluating the impact of the adoption of this accounting pronouncement on our financial statements.

Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2025

Basis of Accounting, Policy [Policy Text Block]

Basis of Presentation

The accompanying unaudited interim Condensed Consolidated Financial Statements have been prepared in accordance with U.S. generally accepted accounting principles (GAAP) for interim financial information. We believe such statements include all adjustments (consisting only of normal recurring adjustments) necessary for the fair statement of our financial position, results of operations and cash flows at the dates and for the periods indicated. Pursuant to the requirements of the Securities and Exchange Commission (SEC) applicable to quarterly reports on Form 10-Q, the accompanying financial statements do not include all disclosures required by GAAP for annual financial statements. While we believe the disclosures presented are adequate to make the information not misleading, these unaudited interim Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and related notes included in our Annual Report on Form 10-K for the year ended December 31, 2024. Operating results for the periods presented in this report are not necessarily indicative of the results that may be expected for the calendar year ending December 31, 2025, or any other interim period. Our business is somewhat seasonal with slightly higher freight volumes typically experienced during August through early November in our full-load freight transportation business.

New Accounting Pronouncements, Policy [Policy Text Block]

Recent Accounting Pronouncements

In December 2023, the Financial Accounting Standards Board (FASB) issued ASU 2023-09, Income Taxes: Improvements to Income Tax Disclosures, which enhances income tax disclosures to provide more transparency about income tax information, primarily related to the rate reconciliation and income taxes paid by jurisdiction information. These disclosures will include consistent categories and greater disaggregation of information in the rate reconciliation and require income taxes paid to be disaggregated by jurisdiction as well as additional amendments to improve the effectiveness of income tax disclosures. The new standard became effective prospectively for us on January 1, 2025, for annual periods, with retrospective adoption permitted. We do not anticipate the adoption of this accounting pronouncement to have a material impact on our financial statements.

In November 2024, the FASB issued ASU 2024-03, Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures, which requires public business entities to disclose, on an annual and interim basis, disaggregated information about certain income statement expense line items in the notes to the financial statements. The standard becomes effective prospectively for us on January 1, 2027, for annual periods, and January 1, 2028, for interim periods, with retrospective adoption permitted. We are currently evaluating the impact of the adoption of this accounting pronouncement on our financial statements.

In September 2025, the FASB issued ASU 2025-06, Intangibles - Goodwill and Other - Internal-Use Software: Targeted Improvements to the Accounting for Internal-Use Software, which clarified and modernizes the accounting for costs related to internal-use software. The amendments in the standard remove all previous references to project stages and clarify the threshold entities apply to begin capitalizing costs. The standard becomes effective for us on January 1, 2028, for annual and interim periods and may be adopted on a prospective basis, a modified basis for in-process projects, or a retrospective basis. We are currently evaluating the impact of the adoption of this accounting pronouncement on our financial statements.