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Restricted Cash, Statement of Financial Position [Extensible Enumeration] Additional paid-in-capital Additional Paid in Capital, Common Stock Shares issued for long-term incentive awards, net of shares withheld for taxes Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Shares issued for long-term incentive awards, net of shares withheld for taxes Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Summary of Calculation of Basic Earnings Per Common Share and Diluted Earnings Per Common Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Increase (Decrease) in Other Operating Assets and Liabilities, Net Increase (Decrease) in Other Operating Assets and Liabilities, Net, Total Change in other assets and liabilities, net New Automobile Liability Insurance Policy [Member] New Automobile Liability Insurance Policy [Member] New automobile liability insurance policy. Basic Earnings Per Share Earnings Per Share, Basic Earnings Per Share, Basic, Total Long Term Debt And Finance Lease Liability Maturities Repayments Of Principal In Year Five Principal amount of long-term debt and finance lease liability maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. 2029 Salaries Salary and Wage, NonOfficer, Excluding Cost of Good and Service Sold Revolving Credit Facility [Member] Revolving Credit Facility [Member] Total current liabilities Liabilities, Current Accounts receivable Increase (Decrease) in Accounts Receivable Stockholders’ Equity: Equity, Attributable to Parent [Abstract] Entity Small Business Entity Small Business Retained Earnings (Accumulated Deficit), Total Retained earnings Retained Earnings (Accumulated Deficit) Organization, Consolidation and Presentation of Financial Statements [Abstract] Claims and insurance accruals Accrued Insurance, Current Amendment Flag Amendment Flag Liabilities and Stockholders’ Equity Liabilities and Equity [Abstract] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Common Stock [Member] Common Stock [Member] Existing Credit Agreement [Member] Existing Credit Agreement [Member] Existing credit agreement. Total Total debt Total debt Long Term Debt And Finance Lease Liability Including Current Maturities Amount of long-term debt and finance lease liability including current maturities. Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Beginning Balance Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Total Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less: accumulated depreciation and amortization Debt Instrument, Interest Rate, Effective Percentage Initial Notes interest rate Entity Address, Address Line One Entity Address, Address Line One Earnings Per Share [Abstract] Balance Sheet Location Statement of Financial Position Location, Balance [Axis] Operating Lease Right-of-Use Assets Operating Lease, Right-of-Use Asset Less: Amounts Representing Interest on Finance Leases Finance Lease, Liability, Undiscounted Excess Amount Document Type Document Type Shelf Agreement [Member] Shelf Agreement [Member] Shelf Agreement [Member] Long Term Debt And Finance Lease Liability Maturities Repayments Of Principal In Year Two Principal amount of long-term debt and finance lease liability maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. 2026 Entity Central Index Key Entity Central Index Key Director deferred value activity. Director Deferred Value Activity Director deferred share activity Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Excluding Exchange Rate Effect, Including Discontinued Operation Net (Decrease) Increase in Cash and Cash Equivalents Intangible Assets, Net (Including Goodwill), Total Goodwill and Identifiable Intangibles, net Intangible Assets, Net (Including Goodwill) Common stock excluded from the calculation of diluted earnings per share Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Common stock, par value Common Stock, Par or Stated Value Per Share Total operating expenses Total operating expenses Operating Costs and Expenses Base Rate Margin [Member] Base Rate [Member] Debt Instruments [Abstract] Exercise of stock options less shares withheld for taxes, Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Debt Disclosure [Abstract] Long Term Debt And Finance Lease Liability Maturities Repayments Of Principal In Year Four Principal amount of long-term debt and finance lease liability maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. 2028 Current Fiscal Year End Date Current Fiscal Year End Date Schedule of Long-Term Debt Instruments [Table] Debt Instrument [Table] Document Quarterly Report Document Quarterly Report Percentage of revenue derived from transporting Percentage Of Revenue Percentage of revenue. Long-term debt, less current portion Long Term Debt And Finance Lease Liabiliity Amount of long-term debt and finance lease liability due after one year or beyond the normal operating cycle, if longer. Entity Address, State or Province Entity Address, State or Province Preferred Stock, Shares Outstanding, Ending Balance Preferred Stock, Shares Outstanding, Beginning Balance Preferred stock, shares outstanding Preferred Stock, Shares Outstanding Dilutive effect of share-based awards Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Accounts Receivable [Member] Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] Estimated fair value of total debt Long-Term Debt, Fair Value Other Noncurrent Assets Other Assets, Noncurrent Number of freight terminals Number of freight terminals Preferred stock, $0.001 par value, 50,000 shares authorized, none issued and outstanding Preferred Stock, Value, Issued Minimum [Member] Minimum [Member] Current Assets: Assets, Current [Abstract] Current Liabilities: Liabilities, Current [Abstract] Secured Overnight Financing Rate Secured Overnight Financing Rate [Member] Secured Overnight Financing Rate [Member] Accounts Receivable, after Allowance for Credit Loss, Current, Total Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Commitments and Contingencies Commitments and Contingencies (Note 3) Deferred Compensation Trust [Member] Deferred Compensation, Share-Based Payments [Member] Other Labor-related Expenses Wages Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture, Total Stock compensation, including options and long-term incentives, Shares Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Rate margin Debt Instrument, Basis Spread on Variable Rate Concentration Risk Benchmark [Axis] Other Liabilities: Liabilities, Noncurrent [Abstract] Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Segment and Consolidated Net Income Long-term Debt, Type Long-Term Debt, Type [Domain] Weighted average common shares outstanding - basic Denominator for basic earnings per share-weighted average common shares Weighted Average Number of Shares Outstanding, Basic Weighted Average Number of Shares Outstanding, Basic, Total Scenario Scenario [Axis] Claims and Insurance Accruals Unpaid Policy Claims and Claims Adjustment Expense, Policy [Policy Text Block] Income loss from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent, Total Borrowings on private shelf agreement Proceeds from Issuance of Private Placement Credit Arrangements, described below Long-Term Debt, Total Borrowing capacity under credit agreement Long-Term Debt APIC, Share-Based Payment Arrangement, Increase for Cost Recognition, Total Stock compensation, including options and long-term incentives APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Variable Rate Variable Rate [Domain] Total stockholders’ equity Beginning Balance Ending Balance Equity, Attributable to Parent Preferred stock, par value Preferred Stock, Par or Stated Value Per Share Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Statement of Stockholders' Equity [Abstract] Claims and insurance Operating Insurance and Claims Costs, Production Entity Address, Address Line Two Entity Address, Address Line Two Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Debt Instrument, Name Debt Instrument, Name [Domain] Other current assets Other Assets, Current Other Segment items Segment Reporting, Other Segment Item, Amount Interest Expense Interest Expense, Operating and Nonoperating Interest Expense, Operating and Nonoperating, Total Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Credit Facility Credit Facility [Axis] Average transit time Revenue Performance Obligation Average Transit Time Revenue, performance obligation, average transit time. 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Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. 2027 Security Exchange Name Security Exchange Name Credit Facility Credit Facility [Domain] Property, Plant and Equipment, Gross, Ending Balance Property, Plant and Equipment, Gross, Beginning Balance Property, Plant and Equipment, Gross, Total Property and Equipment, at cost Property, Plant and Equipment, Gross Income Before Income Taxes Income Before Income Taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest First 12 months [Member] First Twelve Months [Member] First twelve months. Cash and Cash Equivalents, end of period Cash and Cash Equivalents, beginning of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Cash and, Cash Equivalents and Restricted Cash, beginning of period Statistical Measurement Statistical Measurement [Domain] Total current assets Assets, Current Document Period End Date Document Period End Date Other operating, net Loss (gain) from property disposals, net Gain (Loss) on Disposition of Property Plant Equipment Gain (Loss) on Disposition of Property Plant Equipment, Total Statement of Financial Position [Abstract] Loss Contingency Nature Loss Contingency Nature [Axis] Loss Contingency, Nature Loss Contingency, Nature [Domain] Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Summary of significant accounting policies. Operating Expenses: Operating Costs and Expenses [Abstract] Restricted Cash, Total Restricted Cash Variable Rate Variable Rate [Axis] Fuel, operating expenses and supplies FuelOperatingExpensesAndSupplies FuelOperatingExpensesAndSuppliesss Weighted average common shares outstanding - diluted Denominator for diluted earnings per share-adjusted weighted average common shares Weighted Average Number of Shares Outstanding, Diluted Weighted Average Number of Shares Outstanding, Diluted, Total Entity File Number Entity File Number Exercise of stock options less shares withheld for taxes APIC, Share-Based Payment Arrangement, Recognition and Exercise Cover [Abstract] Operating taxes and licenses Operating taxes and licenses Cost, Direct Tax and License Scenario Scenario [Domain] Noncash items included in net income: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Property and equipment, estimated useful lives Property, Plant and Equipment, Useful Life Private Shelf Agreement Member Private Shelf Agreement [Member] Private Shelf Agreement [Member] Adjusted Leverage Ratio Adjusted Leverage Ratio Adjusted Leverage Ratio Common Stock, Shares, Outstanding, Ending Balance Common Stock, Shares, Outstanding, Beginning Balance Common stock, shares outstanding Common Stock, Shares, Outstanding Current portion of operating lease liability Operating Lease, Liability, Current Depreciation, Depletion and Amortization, Total Depreciation and amortization Depreciation and amortization Depreciation, Depletion and Amortization Document Transition Report Document Transition Report Thereafter Long Term Debt And Finance Lease Liability Maturities Repayments Of Principal After Year Five Principal amount of long-term debt and finance lease liability maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Statement of Cash Flows [Abstract] Computation of Earnings Per Share Earnings Per Share [Text Block] Beginning Balance, Shares Ending Balance, Shares Shares, Issued Net Income Net income Income tax receivable Income Taxes Receivable, Current Proceeds from (Payment for) Other Financing Activity Other financing activity Assets Assets [Abstract] Document Fiscal Year Focus Document Fiscal Year Focus Concentration Risk Benchmark [Domain] Payment terms Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Investing Activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Accounts Payable, Current, Total Accounts payable Accounts Payable, Current Interest expense Interest Expense, Nonoperating, Total Interest Expense, Nonoperating Proceeds from stock option exercises Proceeds from Stock Options Exercised Total Long Term Debt And Finance Lease Liability Including Interest On Finance Leases Long term debt and finance lease liability including interest on finance leases. Fair Value Disclosures [Abstract] Commitments and Contingencies Disclosure [Abstract] Debt Instrument Debt Instrument [Axis] Long-Term Debt and Lease Obligation, Current, Total Current portion of long-term debt Long-Term Debt and Lease Obligation, Current Revenues Revenues Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Title of each class Title of 12(b) Security Total other liabilities Other Liabilities, Noncurrent Changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Pro rata share of letters of credit outstanding Letter of credit facility outstanding amount Letters of Credit Outstanding, Amount Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Trading Symbol Trading Symbol Employee-related Liabilities, Current, Total Wages, vacation and employees’ benefits Employee-related Liabilities, Current Financing Activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Letter of credit unused portion fee Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Entity Ex Transition Period Equity Components Equity Components [Axis] Nonoperating expenses, net Nonoperating Income (Expense) Nonoperating expenses, net PurchasedTransportations PurchasedTransportations Purchased Transportation Purchased transportation Equity Component Equity Component [Domain] Asset Class [Axis] Interest Income, Interest-Earning Asset, Total Interest Income, Interest-Earning Asset Interest income Interest income Maximum [Member] Maximum [Member] Statistical Measurement Statistical Measurement [Axis] Prepaid expenses Prepaid Expense, Current Prepaid Expense, Current, Total Common Stock, Value, Issued Common stock, $0.001 par value, 100,000,000 shares authorized, 26,642,641 and 26,598,512 shares issued and outstanding at September 30, 2025 and December 31, 2024, respectively Property and Equipment [Member] Property, Plant and Equipment [Member] Repayment of finance leases Finance Lease, Principal Payments Schedule of Measure of Segment Assets Schedule of Measure of Segment Assets (Table Text Block) Schedule of Measure of Segment Assets (Table Text Block) Entire 36 Months [Member] Entire Thirty Six Months [Member] Entire thirty six months. Preferred stock, shares authorized Preferred Stock, Shares Authorized Summary of Reconciliation of Debt Schedule of Debt [Table Text Block] Number of completed acquisition leases freight terminals Number of completed acquisition leases freight terminals Shares withheld for taxes Payment, Tax Withholding, Share-Based Payment Arrangement Entity Registrant Name Entity Registrant Name Debt and Financing Arrangements Debt Disclosure [Text Block] Other, net Other, net Other Nonoperating Income (Expense) Other Nonoperating Income (Expense), Total Deferred compensation trust Common Stock, Shares Held in Employee Trust, Shares One Year Extension Policy [Member] Twelve Months Extension [Member] Twelve Months Extension [Member] Income Tax Expense (Benefit) Income Tax Expense (Benefit), Total Income Tax Expense Income Tax Provision Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Credit Agreement [Member] Credit Agreement [Member] Acquisition of property and equipment Payments to Acquire Property, Plant, and Equipment Payments to Acquire Property, Plant, and Equipment, Total Payment for (Proceeds from) Other Investing Activity Other Other Total assets Assets Less: current portion of long-term debt Long Term Debt And Finance Lease Liability Current Amount of long-term debt and finance leases due within one year or the normal operating cycle, if longer. Income Statement [Abstract] Deferred income taxes Deferred Income Tax Expense (Benefit) Deferred Income Tax Expense (Benefit), Total Common Stock Issued, Employee Trust, Deferred Deferred compensation trust, 69,573 and 70,100 shares of common stock at cost at September 30, 2025 and December 31, 2024, respectively Business Business Policy [Text Block] Description of the business and summary of the company accounting policies. Diluted earnings per share Diluted Earnings Per Share Earnings Per Share, Diluted Earnings Per Share, Diluted, Total Director deferred share activity. Director Deferred Share Activity Director deferred share activity , Shares Claims, insurance and other Claims Insurance And Other Noncurrent Claims insurance and other noncurrent. Shares issued for long-term incentive awards, net of shares withheld for taxes, Shares Shares Issued For Long Term Incentive Shares Awards Net Of Shares With Held For Taxes Shares issued for long term incentive shares awards net of shares with held for taxes. City Area Code City Area Code Debt Instrument, Issued, Principal Selling of aggregate principal amount Four Year Policy [Member] Fourty Eight Months Policy [Member] Fourty Eight Months Policy [Member] Proceeds from Lines of Credit Proceeds from Lines of Credit, Total Borrowings of revolving credit facility Sale of shares by Deferred Compensation Trust Sale Of Shares By Deferred Compensation Trust Sale of shares issued under share-based plans to employees or officers which is the unearned portion, accounted for under the fair value method. Borrowing capacity under credit agreement Line of Credit Facility, Maximum Borrowing Capacity Purchase of shares by Deferred Compensation Trust Purchase Of Shares By Deferred Compensation Trust Purchase of shares issued under share-based plans to employees or officers which is the unearned portion, accounted for under the fair value method. 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