1001 - Document - Cover Page link:presentationLink link:definitionLink link:calculationLink 1002 - Statement - CONSOLIDATED BALANCE SHEETS link:presentationLink link:definitionLink link:calculationLink 1003 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:definitionLink link:calculationLink 1004 - Statement - CONSOLIDATED STATEMENTS OF INCOME link:presentationLink link:definitionLink link:calculationLink 1005 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME link:presentationLink link:definitionLink link:calculationLink 1006 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) link:presentationLink link:definitionLink link:calculationLink 1007 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:definitionLink link:calculationLink 1008 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY link:presentationLink link:definitionLink link:calculationLink 1009 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) link:presentationLink link:definitionLink link:calculationLink 999001 - Disclosure - Significant Accounting Policies link:presentationLink link:definitionLink link:calculationLink 999002 - Disclosure - Share-Based Payment Arrangements link:presentationLink link:definitionLink link:calculationLink 999003 - Disclosure - Income Taxes link:presentationLink link:definitionLink link:calculationLink 999004 - Disclosure - Earnings Per Share link:presentationLink link:definitionLink link:calculationLink 999005 - Disclosure - Additional Cash Flow Information link:presentationLink link:definitionLink link:calculationLink 999006 - Disclosure - Segment Information link:presentationLink link:definitionLink link:calculationLink 999007 - Disclosure - Other Comprehensive Income link:presentationLink link:definitionLink link:calculationLink 999008 - Disclosure - Investments link:presentationLink link:definitionLink link:calculationLink 999009 - Disclosure - Leases link:presentationLink link:definitionLink link:calculationLink 999010 - Disclosure - Debt link:presentationLink link:definitionLink link:calculationLink 999011 - Disclosure - Commitments and Contingencies link:presentationLink link:definitionLink link:calculationLink 999012 - Disclosure - Change in Accounting Estimate for Self-Insured Claims link:presentationLink link:definitionLink link:calculationLink 999013 - Disclosure - Subsidiary Wind Down link:presentationLink link:definitionLink link:calculationLink 999014 - Disclosure - Recent Accounting Pronouncements link:presentationLink link:definitionLink link:calculationLink 999015 - Disclosure - Significant Accounting Policies (Policies) link:presentationLink link:definitionLink link:calculationLink 999016 - Disclosure - Significant Accounting Policies (Tables) link:presentationLink link:definitionLink link:calculationLink 999017 - Disclosure - Share-Based Payment Arrangements (Tables) link:presentationLink link:definitionLink link:calculationLink 999018 - Disclosure - Segment Information (Tables) link:presentationLink link:definitionLink link:calculationLink 999019 - Disclosure - Other Comprehensive Income (Tables) link:presentationLink link:definitionLink link:calculationLink 999020 - Disclosure - Investments (Tables) link:presentationLink link:definitionLink link:calculationLink 999021 - Disclosure - Leases (Tables) link:presentationLink link:definitionLink link:calculationLink 999022 - Disclosure - Change in Accounting Estimate for Self-Insured Claims (Tables) link:presentationLink link:definitionLink link:calculationLink 999023 - Disclosure - Schedule Of Revenue By Major Customers By Reporting Segments (Detail) link:presentationLink link:definitionLink link:calculationLink 999024 - Disclosure - Share-Based Payment Arrangements - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999025 - Disclosure - Amounts Recognized in Financial Statements with Respect to Plans (Detail) link:presentationLink link:definitionLink link:calculationLink 999026 - Disclosure - Schedule of Information on Restricted Stock Units (Detail) link:presentationLink link:definitionLink link:calculationLink 999027 - Disclosure - Schedule of Information on Non - Vested Restricted Stock Units (Detail) link:presentationLink link:definitionLink link:calculationLink 999028 - Disclosure - Income Taxes - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999029 - Disclosure - Additional Cash Flow Information - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999030 - Disclosure - Additional Cash Flow Information - Additional Information (Detail) Alternate link:presentationLink link:definitionLink link:calculationLink 999031 - Disclosure - Segment Information - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999032 - Disclosure - Information Regarding Reportable Business Segments (Detail) link:presentationLink link:definitionLink link:calculationLink 999033 - Disclosure - Information Regarding Reportable Business Segments (Parenthetical) (Detail) link:presentationLink link:definitionLink link:calculationLink 999034 - Disclosure - Other Comprehensive Income - Components of and Changes in Accumulated Other Comprehensive (loss) Income, Net of Related Income Taxes (Detail) link:presentationLink link:definitionLink link:calculationLink 999035 - Disclosure - Investments - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999036 - Disclosure - Investments - Amortized Cost and Fair Value of Available-for-Sale Investments (Detail) link:presentationLink link:definitionLink link:calculationLink 999037 - Disclosure - Investments - Schedule of Unrealized Loss on Available-for-Sale Investments (Detail) link:presentationLink link:definitionLink link:calculationLink 999038 - Disclosure - Leases - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999039 - Disclosure - Leases - Components of Lease Cost for Finance Leases and Operating Leases (Detail) link:presentationLink link:definitionLink link:calculationLink 999040 - Disclosure - Leases - Classification on our Consolidated Balance Sheet (Detail) link:presentationLink link:definitionLink link:calculationLink 999041 - Disclosure - Leases - Undiscounted Cash Flows for the Finance and Operating Leases (Detail) link:presentationLink link:definitionLink link:calculationLink 999042 - Disclosure - Leases - Undiscounted Cash Flows for the Finance and Operating Leases (Parenthetical) (Detail) link:presentationLink link:definitionLink link:calculationLink 999043 - Disclosure - Leases - Weighted Average Remaining Lease Term and the Weighted Average Discount Rate for Finance and Operating leases (Detail) link:presentationLink link:definitionLink link:calculationLink 999044 - Disclosure - Debt - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999045 - Disclosure - Commitments and Contingencies - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999046 - Disclosure - Change in Accounting Estimate for Self-Insured Claims - Effect of Increase in Cost of Insurance and Claims (Detail) link:presentationLink link:definitionLink link:calculationLink 999047 - Disclosure - Subsidiary Wind Down - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999048 - Disclosure - Subsidiary Wind Down - Additional Information (Detail) Alternate link:presentationLink link:definitionLink link:calculationLink Cover [Abstract] Document Period End Date Entity Current Reporting Status Entity Filer Category Entity Registrant Name Entity Interactive Data Current Entity Common Stock, Shares Outstanding Entity File Number Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, City or Town Entity Address, Postal Zip Code City Area Code Local Phone Number Document Quarterly Report Document Transition Report Entity Shell Company Entity Small Business Entity Emerging Growth Company Trading Symbol Title of 12(b) Security Security Exchange Name Entity Address, State or Province Document Type Amendment Flag Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Period Focus Entity Central Index Key Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Statement [Line Items] Statement [Line Items] Amortization of right-of-use assets Assets [Abstract] ASSETS Assets, Current [Abstract] Current Assets Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Short-term Investments Short-term investments Nontrade Receivables, Current Other receivables, including advances to independent contractors, less allowance of $14,727 and $18,759 Accounts Receivable, after Allowance for Credit Loss, Current Trade accounts receivable, less allowance of $9,135 and $12,490 Other Assets, Current Other current assets Assets, Current Total current assets Disposal Group, Including Discontinued Operation, Assets, Current Assets held for sale Property, Plant and Equipment, Net Operating property, less accumulated depreciation and amortization of $488,271 and $473,642 Goodwill Goodwill Other Assets, Noncurrent Other assets Assets Total assets Liabilities and Equity [Abstract] LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities, Current [Abstract] Current Liabilities Bank Overdrafts Cash overdraft Accounts Payable, Current Accounts payable Finance Lease, Liability, Current Current maturities of long-term debt Current maturities of long-term debt Self Insurance Reserve, Current Insurance claims Dividends Payable, Current Dividends payable Other Liabilities, Current Other current liabilities Liabilities, Current Total current liabilities Disposal Group, Including Discontinued Operation, Liabilities Liabilities held for sale Stockholders' Equity Attributable to Parent [Abstract] Shareholders' Equity Common Stock, Value, Issued Common stock, $0.01 par value, authorized 160,000,000 shares, issued 68,631,174 and 68,590,708 shares Additional Paid in Capital, Common Stock Additional paid-in capital Cumulative adjustment to retained earnings Retained earnings Treasury Stock, Value Cost of 34,694,249 and 34,531,982 shares of common stock in treasury Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Stockholders' Equity Attributable to Parent Total shareholders' equity Beginning Balance Ending Balance Self Insurance Reserve, Noncurrent Insurance claims Deferred Income Taxes and Other Liabilities, Noncurrent Deferred income taxes and other noncurrent liabilities Liabilities and Equity Total liabilities and shareholders' equity Finance Lease, Liability, Noncurrent Long-term debt, excluding current maturities Long-term debt, excluding current maturities Allowance for Doubtful Accounts Receivable, Current Allowance on trade accounts receivable Allowance for Doubtful Accounts, Premiums and Other Receivables Allowance on other receivables Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Accumulated depreciation and amortization on operating property Common Stock, Par or Stated Value Per Share Common stock, par value Common Stock, Shares Authorized Common stock, authorized shares Common Stock, Shares, Issued Common stock, issued shares Treasury Stock, Common, Shares Treasury stock, shares Treasury Stock Ending Balance (in shares) Treasury Stock Beginning Balance (in shares) Income Statement [Abstract] Costs and Expenses [Abstract] Costs and expenses: Purchased Transportation Costs Purchased transportation The cost of purchased transportation and transportation-related services of third party capacity providers of various modes for the carriage of customer freight during the period. Sales Commissions and Fees Commissions to agents Other Cost and Expense, Operating Other operating costs, net of gains on asset sales/dispositions Operating Insurance and Claims Costs, Production Insurance and claims Selling, General and Administrative Expense Selling, general and administrative Depreciation, Depletion and Amortization, Nonproduction Depreciation and amortization Depreciation and amortization Costs and Expenses Total costs and expenses Revenue from Contract with Customer, Excluding Assessed Tax Revenue Interest Income, Operating Investment income Operating Income (Loss) Operating income Operating income Operating income Interest and Debt Expense Interest and debt expense Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income before income taxes Income before income taxes Income Tax Expense (Benefit) Income taxes Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income Net income Earnings Per Share, Basic Basic earnings per share Earnings Per Share, Diluted Diluted earnings per share Common Stock, Dividends, Per Share, Declared Dividends per common share Weighted Average Number of Shares Outstanding, Basic Average basic shares outstanding Weighted Average Number of Shares Outstanding, Diluted Average diluted shares outstanding Statement of Comprehensive Income [Abstract] Other Comprehensive Income (Loss), Net of Tax [Abstract] Other comprehensive (loss) income: Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax Unrealized holding (losses) gains on available-for-sale investments, net of tax (benefit) expense of ($184), $424, $30 and $160 Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Foreign currency translation (losses) gains Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Other comprehensive (loss) income Other comprehensive loss Net income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income Other Comprehensive Income (Loss), Securities, Available-for-sale, Tax Unrealized holding (losses) gains on available-for-sale investments, net of tax (benefit) expense Statement of Cash Flows [Abstract] Net Cash Provided by (Used in) Financing Activities [Abstract] FINANCING ACTIVITIES Proceeds from (Repayments of) Bank Overdrafts Increase (decrease) in cash overdraft Payments of Dividends Dividends paid Payments Related to Tax Withholding for Share-based Compensation Taxes paid in lieu of shares issued related to stock-based compensation plans Payments for Repurchase of Common Stock Purchases of common stock Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities Principal payments on finance lease obligations Net Cash Provided by (Used in) Financing Activities NET CASH USED BY FINANCING ACTIVITIES Net Cash Provided by (Used in) Investing Activities [Abstract] INVESTING ACTIVITIES Proceeds from Sale and Maturity of Marketable Securities Sales and maturities of investments Payments to Acquire Marketable Securities Purchases of investments Payments to Acquire Property, Plant, and Equipment Purchases of operating property Proceeds from Sale of Property, Plant, and Equipment Proceeds from sales of operating property Net Cash Provided by (Used in) Investing Activities NET CASH USED BY INVESTING ACTIVITIES Net Cash Provided by (Used in) Operating Activities [Abstract] OPERATING ACTIVITIES Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Receivables Increase in trade and other accounts receivable Increase (Decrease) in Other Operating Assets Increase in other assets Increase (Decrease) in Accounts Payable Increase in accounts payable Increase (Decrease) in Other Operating Liabilities Increase in other liabilities Increase (Decrease) in Insurance Liabilities Increase in insurance claims Amortization of Debt Issuance Costs Non-cash interest charges Provision for Doubtful Accounts Provisions for losses on trade and other accounts receivable Gain (Loss) on Disposition of Property Plant Equipment Gains on sales/disposals of operating property Increase (Decrease) in Deferred Income Taxes Deferred income taxes, net Share-based Compensation Stock-based compensation Total cost of the Plans during the period Net Cash Provided by (Used in) Operating Activities NET CASH PROVIDED BY OPERATING ACTIVITIES Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Net change in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Increase Decrease In Cash And Cash Equivalents Classified As Assets Held For Sale Plus: Net change in cash and cash equivalents classified as assets held for sale Increase decrease in cash and cash equivalents classified as assets held for sale. Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect Including Cash Cash Equivalents Classified As Assets Held For Sale Decrease in cash and cash equivalents, including cash and cash equivalents classified as assets held for sale Cash cash equivalents restricted cash and restricted cash equivalents period increase decrease including exchange rate effect including cash cash equivalents classified as assets held for sale. Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Effect of exchange rate changes on cash and cash equivalents Statement of Stockholders' Equity [Abstract] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Stock Additional Paid-in Capital [Member] Additional Paid-In Capital Retained Earnings [Member] Retained Earnings Treasury Stock, Common [Member] Treasury Stock at Cost AOCI Attributable to Parent [Member] Accumulated Other Comprehensive (Loss) Income Accumulated Other Comprehensive Income (Loss) Shares, Issued Beginning Balance (in shares) Ending Balance (in shares) Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Beginning Balance Ending Balance Dividends, Common Stock, Cash Dividends Treasury Stock, Shares, Acquired Purchases of common stock (in shares) Treasury Stock, Value, Acquired, Cost Method Purchases of common stock Treasury stock, common, value Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Issuance of stock related to stock-based compensation plans (in shares) Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Issuance of stock related to stock-based compensation plans Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Stock-based compensation Other Comprehensive Income (Loss), Net of Tax Other comprehensive income Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption [Domain] Accounting Policies [Abstract] Significant Accounting Policies [Text Block] Significant Accounting Policies Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Share-Based Payment Arrangements Income Tax Disclosure [Abstract] Income Tax Disclosure [Text Block] Income Taxes Earnings Per Share [Abstract] Earnings Per Share [Text Block] Earnings Per Share Supplemental Cash Flow Elements [Abstract] Cash Flow, Supplemental Disclosures [Text Block] Additional Cash Flow Information Segment Reporting [Abstract] Segment Reporting Disclosure [Text Block] Segment Information Comprehensive Income (Loss) Note [Text Block] Other Comprehensive Income Investments, Debt and Equity Securities [Abstract] Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Investments Leases [Abstract] Disclosure Of Leases Of Lessee [Text Block] Leases Disclosure Of leases of lessee. Debt Disclosure [Abstract] Debt Disclosure [Text Block] Debt Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Accounting Changes and Error Corrections [Abstract] Change in Accounting Estimate [Text Block] Change in Accounting Estimate for Self-Insured Claims Discontinued Operations and Disposal Groups [Abstract] Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Subsidiary Wind Down Accounting Standards Update and Change in Accounting Principle [Text Block] Recent Accounting Pronouncements Accounting Policies [Table] Accounting Policies [Line Items] Revenue from Contract with Customer [Policy Text Block] Revenue from Contracts with Customers – Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Schedule of Disaggregation of Revenue Share Based Payment Arrangements [Table] Award Type [Axis] Equity Award [Domain] Share Based Payment Arrangements [Line Items] Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block] Schedule of Amounts Recognized in Financial Statements with Respect to Plans Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] Schedule of Information on Restricted Stock Units Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Schedule of Information on Non-Vested Restricted Stock and Deferred Stock Units Schedule of Segment Reporting Information, by Segment [Table Text Block] Information Regarding Reportable Business Segments Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Components of and Changes in Accumulated Other Comprehensive Income, Net of Related Income Taxes Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Amortized Cost and Fair Value of Available-for-Sale Investments Schedule Of Unrealized Loss On Available Sale Investments [Table Text Block] Schedule of Unrealized Loss on Available-for-Sale Investments Schedule of unrealized loss on available sale investments. Lease, Cost [Table Text Block] Lease, Cost Schedule Of Supplemental Balance Sheet Information Related To Leases [Table Text Block] Schedule of Supplemental Balance Sheet Information Related To Leases Schedule of supplemental balance sheet information related to leases. Finance And Operating Lease Maturity [Table Text Block] Finance And Operating Lease Maturity Represensts maturity schedule of operating and finance lease. Schedule Discount Rate And Lease Term Used In Calculating Lease Liabilities And Assets [Table Text Block] Schedule Discount Rate And Lease Term Used In Calculating Lease Liabilities And Assets Tabular disclosure of discount rate and remaining lease term of operating and financial leases. Schedule of Change in Accounting Estimate [Table Text Block] Effect of Increase in Cost of Insurance and Claims Schedule of Revenue by Major Customers, by Reporting Segments [Table] Contract with Customer, Sales Channel [Axis] Contract with Customer, Sales Channel [Domain] BCO Independent Contractor [Member] BCO Independent Contractors – Truck BCO independent contractor. Truck Brokerage Carriers [Member] Brokerage Carriers - Truck Truck brokerage carriers. Rail Intermodal [Member] Rail Intermodal Rail intermodal. Ocean And Air Cargo Carriers [Member] Ocean and air cargo carriers Ocean and air cargo carriers. Bco Independent Contractor Truck and Brokerage Carriers Truck [Member] BCO Independent Contractor Truck and Brokerage Carriers Truck BCO independent contractor truck and brokerage carriers truck . Product and Service [Axis] Product and Service [Domain] Van Equipment [Member] Van Equipment Van equipment. Unsided Platform Equipment [Member] Unsided/Platform Equipment Unsided platform equipment. Less than Truckload [Member] Less than Truckload Less than truckload. Other Truck Transportation [Member] Other Truck Transportation Other Truck Transportation Disaggregation of Revenue [Line Items] Percentage of Consolidated Revenue Percentage of consolidated revenue. Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Date [Axis] Award Date [Axis] Award Date [Domain] Award Date [Domain] Restricted Stock Units (RSUs) [Member] Restricted Stock Units (RSUs) Non Vested Restricted Stock and Deferred Stock Units [Member] Non Vested Restricted Stock and Deferred Stock Units Non vested restricted stock and deferred stock units. Deferred Stock Unit [Member] Deferred Stock Unit Deferred Stock Unit [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Two Thousand Eleven Equity Incentive Plan [Member] 2011 Equity Incentive Plan Two Thousand Eleven Equity Incentive Plan. Two Thousand and Twenty Two Directors Stock Compensation Plan [Member] 2022 Directors Stock Compensation Plan Statistical Measurement [Axis] Range [Axis] Statistical Measurement [Domain] Range [Domain] Maximum [Member] Maximum Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Common stock authorized for issuance Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-Based Payment Arrangement, Amount Tax deficiencies (excess tax benefits) from stock-based awards Common Stock, Capital Shares Reserved for Future Issuance Common stock reserved for issuance Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Maximum percentage of target available for common share issuance Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Stock awards granted, shares Granted Allocated Share-based Compensation Expense Recognized share-based compensation expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Unrecognized compensation cost, other than options Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Unrecognized compensation cost expected to be recognized over period, years Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award Terms of award Title of Individual [Axis] Title of Individual [Axis] Title of Individual [Domain] Relationship to Entity [Domain] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Amount of related income tax benefit recognized during the period Allocated Share-based Compensation Expense, Net of Tax Net cost of the Plans during the period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Number of Shares Number of Shares and Deferred Stock Units Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Beginning Balance Ending Balance Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Beginning Balance Ending Balance Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Vested Income Taxes [Table] Income Taxes [Table] Income Taxes [Table] Income Taxes [Line Items] Income Taxes [Line Items] Income Taxes [Line Items] Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Corporate income tax rate Estimated Annual Effective Tax Rate For Continuing Operations Estimated annual effective income tax rate Estimated Annual Effective Tax Rate For Continuing Operations Effective Income Tax Rate Reconciliation, Percent Effective income tax rate Ownership [Axis] Ownership [Domain] Income Tax Jurisdiction [Axis] Income Tax Jurisdiction [Domain] Schedule Of Cash Flow Supplemental [Table] Schedule of Cash Flow, Supplemental [Table] Geographical [Axis] Geographical [Domain] Schedule Of Cash Flow Supplemental [Line Items] Schedule of Cash Flow, Supplemental [Line Items] Income Taxes Paid Income taxes paid Interest Paid, Excluding Capitalized Interest, Operating Activities Interest paid Excise Tax Payable On Common Stock Repurchases Excise tax payable on common stock repurchases Excise Tax Payable On Common Stock Repurchases Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Right-of-Use asset obtained in exchange for finance lease liability Share Repurchase Program, Excise Tax Share repurchase program, Excise tax Payments For Repurchases Of Common Stock Excluding Excise Tax Payments for repurchases of common stock excluding excise tax Payments for repurchases of common stock excluding excise tax. Location, Statement of Financial Position, Balance [Axis] Segment Reporting [Table] Consolidated Entities [Axis] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Number Of Customers Accounting For 10 Percent Or More Of Revenue Number of customers accounting for 10 percent or more of total revenue Number of customers accounting for 10 percent or more of revenue. Entity Wide Revenue No Major Customer Accounted For Benchmark Percentage No single customer accounted for benchmark percentage to be considered major customer Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues. Number of Reportable Segments Number of reportable segments Interest And Debt Income Expense Interest and debt expense (income) Interest and debt (income) expense. Insurance and Claims Insurance and claims Insurance and claims. Revenues Revenue Gross Revenue Gross revenue Gross revenue. Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Transportation Logistics [Member] Transportation Logistics Transportation Logistics. Insurance [Member] Insurance Insurance. Related Party, Type [Axis] Related Party, Type [Domain] Related Party [Member] Reconciliation of Revenue from Segments to Consolidated [Table] Interest Income, Operating, Paid in Cash Interest income earned on cash Interest Expense, Operating and Nonoperating Total interest expense Equity [Abstract] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] Unrealized Holding Gains (Losses) on Available-for-Sale Securities Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Foreign Currency Translation Debt Securities, Available-for-Sale [Table] Debt Securities, Available-for-Sale [Table] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] Investments Maximum Maturity Period Investments maximum maturity period Investments maximum maturity period, years Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain (Loss), before Tax Unrealized gain (loss), net of unrealized gains/losses, on the investments in the bond portfolio Industry Sector [Axis] Industry Sector [Domain] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Money Market Funds [Member] Money market investments Asset-backed Securities [Member] Asset-backed securities US Treasury Securities [Member] U.S. Treasury obligations Corporate Bonds Commercial Paper And Direct Obligations Of Government Agencies [Member] Corporate bonds, commercial paper and direct obligations of government agencies Corporate bonds, commercial paper, and direct obligations of government agencies Corporate bonds, commercial paper and direct obligations of government agencies. Debt Securities, Available-for-sale, Amortized Cost Amortized Cost Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Gross Unrealized Losses Debt Securities, Available-for-sale Fair Value Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss Debt Securities, Available-for-sale, Unrealized Loss Position Available-for-sale investments with unrealized losses, Fair Value, Total Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss Available-for-sale investments with unrealized losses, Unrealized Loss, Total Lessee, Lease, Description [Table] Leases Disclosure [Table] Lessee, Lease, Description [Line Items] Leases Disclosure [Line Items] Finance Lease Option to Purchase Option Value Finance lease option to purchase option value Represents purchase value of option. Lessee, Finance Lease, Term of Contract Lessee, Finance Lease, Term of Contract Leases [Table] Income and Expenses, Lessee [Abstract] Finance leases: Finance Lease, Right-of-Use Asset, Amortization Amortization of right-of-use assets Finance Lease, Interest Expense Interest on lease liability Finance Lease Cost Total finance lease cost Represents total finance lease cost. Operating lease cost [Abstract] Operating leases: Represents operating lease cost abstract Operating Lease, Cost Lease cost Sublease Income Sublease income Operating Leases Rent Income Expense Net Total net operating lease cost Rental income for the reporting period under operating leases net of related rental income expense. Variable Lease, Cost Variable lease cost Lease, Cost Total net lease cost Leases [Line Items] Operating Lease, Right-of-Use Asset Operating lease right-of-use assets Finance Lease, Right-of-Use Asset Finance lease assets Lease Right of Use Asset Total lease assets Represents aggregate of operating and finance lease right of use assets. Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Payments, Due Next Twelve Months 2026 Remainder Finance Lease, Liability, Payments, Due Year Two 2027 Finance Lease, Liability, Payments, Due Year Three 2028 Finance Lease, Liability, Payments, Due Year Four 2029 Finance Lease, Liability, Payments, Due Year Five 2030 Finance Lease, Liability, Payments, Due after Year Five Thereafter Finance Lease, Liability, Payments, Due Total future minimum lease payments Finance Lease, Liability Present value of minimum lease payments Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months 2026 Remainder Lessee, Operating Lease, Liability, Payments, Due Year Two 2027 Lessee, Operating Lease, Liability, Payments, Due Year Three 2028 Lessee, Operating Lease, Liability, Payments, Due Year Four 2029 Lessee, Operating Lease, Liability, Payments, Due Year Five 2030 Lessee, Operating Lease, Liability, to be Paid, after Year Five Thereafter Lessee, Operating Lease, Liability, Payments, Due Total future minimum lease payments Operating Lease, Liability Present value of minimum lease payments Operating Lease, Liability, Current Operating lease, liability, current Lessee, Operating Lease, Liability, Undiscounted Excess Amount Less amount representing interest (1.6% to 6.4%) Finance Lease, Liability, Undiscounted Excess Amount Less amount representing interest (1.6% to 6.4%) Operating Lease, Liability, Noncurrent Operating lease, liability, non-current Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Minimum [Member] Minimum Finance lease Interest rate percentage Finance lease Interest rate percentage Finance Lease, Weighted Average Remaining Lease Term Weighted average remaining lease term (years) Finance Lease, Weighted Average Discount Rate, Percent Weighted average discount rate Operating Lease, Weighted Average Remaining Lease Term Weighted average remaining lease term (years) Operating Lease, Weighted Average Discount Rate, Percent Weighted average discount rate Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility [Member] Revolving Credit Facility Debt Instrument [Line Items] Debt Instrument [Line Items] Line of Credit Facility, Initiation Date Credit facility, initiation date Line of Credit Facility, Expiration Date Credit facility, expiration date Line of Credit Facility, Current Borrowing Capacity Credit facility, borrowing capacity Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Credit facility, unused credit commitment fee Debt Instrument, Basis Spread on Variable Rate Borrowings, basis spread on variable rate Leverage Ratio Required Net Leverage ratio beyond which amount of cash dividends and other distributions to stockholders is limited Leverage Ratio Required Line of Credit Facility Outstanding Stock Percentage that Should be Acquired to Trigger Event of Default Credit facility event of default, minimum percentage that a person or group should acquire outstanding capital stock Line of Credit Facility Outstanding Stock Percentage that Should be Acquired to Trigger Event of Default Line of Credit Facility, Covenant Compliance Credit facility, debt covenants compliance Line of Credit Facility, Incremental Borrowing Capacity Credit facility, maximum borrowing capacity Line of credit facility, incremental borrowing capacity. Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Base Rate [Member] Base Rate [Member] Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate Agreement [Axis] Agreement. Agreement [Domain] Agreement. Third Amended and Restated Credit Agreement [Member] Third Amended and Restated Credit Agreement Commitments and Contingencies Disclosure [Table] Commitments and Contingencies Disclosure [Table] Commitments and Contingencies Disclosure [Table] Commitments and Contingencies Disclosure [Line Items] Commitments and Contingencies Disclosure [Line Items] Commitments and Contingencies Disclosure [Line Items] Letters of Credit Outstanding, Amount Letters of credit outstanding Long-term Investments Total non-current investments Debt Securities, Available-for-Sale, Restricted Investments providing collateral for letters of credit to guarantee insurance claims Guarantee Payment Of Insurance Claims [Member] Guarantee Payment of Insurance Claims Guarantee Payment of Insurance Claims. Current Investments [Member] Current Investments Current Investments. Non Current Investments [Member] Non-Current Investments Non-Current Investments. Collateral [Axis] Collateral [Domain] Collateral Pledged [Member] Collateral Pledged [Member] Policyholders Account In Life Insurance Business [Abstract] Policyholders Account In Life Insurance Business [Abstract] Change in Accounting Estimate [Table] Schedule of Change in Accounting Estimate [Table] Change in Accounting Estimate by Type [Axis] Change in Accounting Estimate by Type [Axis] Change in Accounting Estimate, Type [Domain] Change in Accounting Estimate, Type [Domain] Development Of Prior Year Self Insured Claims Estimates [Member] Development of Prior Year Self Insured Claims Estimates Development of Prior Year Self Insured Claims Estimates. Change in Accounting Estimate [Line Items] Change in Accounting Estimate [Line Items] Disposal Groups, Including Discontinued Operations [Table] Location, Statement of Income, Balance [Axis] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Impairment of Long-Lived Assets to be Disposed of Impairment of Long-Lived Assets to be Disposed of Disposal Group, Including Discontinued Operation, Description and Timing of Disposal