Schedule H, Line 4j - Schedule of Reportable Transactions (Details) - EBP 002
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12 Months Ended |
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Dec. 31, 2025
USD ($)
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Plan Name |
OLD DOMINION 401(k) RETIREMENT PLAN
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| Entity Tax Identification Number |
56-0751714
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| EBP, Plan Number |
002
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| Investment, Identifier [Axis]: Collective Trust Funds: Kayne Anderson Rudnick, Mid Cap Core CIT Class 3 |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
Kayne Anderson Rudnick [Member]
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| Investment, Identifier [Axis]: Collective Trust Funds: Vanguard, Institutional 500 Index Trust Unit Class C |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
Vanguard [Member]
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| Investment, Identifier [Axis]: Collective Trust Funds: Vanguard, Institutional Total International Stock Market Index Trust Unit Class C |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
Vanguard [Member]
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| Investment, Identifier [Axis]: Fully Benefit-Responsive Investment Contract: Empower, E I Fixed Account - Series Class V, contract value |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
Empower [Member]
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| Investment, Identifier [Axis]: Mutual Funds: American, Washington Mutual Fund - R6 |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
American [Member]
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| Investment, Identifier [Axis]: Mutual Funds: JP Morgan, Smart Retirement 2025 Fund R5 |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
JP Morgan [Member]
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| Investment, Identifier [Axis]: Mutual Funds: JP Morgan, Smart Retirement 2030 Fund R5 |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
JP Morgan [Member]
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| Investment, Identifier [Axis]: Mutual Funds: JP Morgan, Smart Retirement 2035 Fund R5 |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
JP Morgan [Member]
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| Investment, Identifier [Axis]: Mutual Funds: JP Morgan, Smart Retirement 2040 Fund R5 |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
JP Morgan [Member]
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| Investment, Identifier [Axis]: Mutual Funds: JP Morgan, Smart Retirement 2045 Fund R5 |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
JP Morgan [Member]
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| Investment, Identifier [Axis]: Mutual Funds: JP Morgan, Smart Retirement 2050 Fund R5 |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
JP Morgan [Member]
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| Investment, Identifier [Axis]: Mutual Funds: JP Morgan, Smart Retirement 2055 Fund R5 |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
JP Morgan [Member]
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| Investment, Identifier [Axis]: Mutual Funds: JP Morgan, Smart Retirement 2060 Fund R5 |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
JP Morgan [Member]
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| Investment, Identifier [Axis]: Mutual Funds: JP Morgan, Smart Retirement 2065 Fund R5 |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
JP Morgan [Member]
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| Investment, Identifier [Axis]: Mutual Funds: JP Morgan, Smart Retirement Income Fund R5 |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
JP Morgan [Member]
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| Investment, Identifier [Axis]: Mutual Funds: JP Morgan, US Large Cap Core Plus Fund - Select |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
JP Morgan [Member]
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| Investment, Identifier [Axis]: Mutual Funds: Russell, US Small Cap Equity - Select |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
Russell [Member]
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| Investment, Identifier [Axis]: Mutual Funds: Vanguard, Mid-Cap Index Fund Institutional Plus Shares |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
Vanguard [Member]
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| Investment, Identifier [Axis]: Mutual Funds: Vanguard, Small Cap Index Fund Institutional |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
Vanguard [Member]
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| Investment, Identifier [Axis]: Old Dominion Freight Line, Inc., Common Stock |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
Old Dominion Freight Line, Inc. [Member]
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| Investment, Identifier [Axis]: Pooled Separate Accounts: Capital Group, EuroPacific Growth SA |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
Capital Group [Member]
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| Investment, Identifier [Axis]: Pooled Separate Accounts: Jennison, Large Cap Growth / Jennison Fund |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
Jennison [Member]
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| Investment, Identifier [Axis]: Pooled Separate Accounts: MetWest, Core Plus Bond Fund (IS Platform) |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
MetWest [Member]
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| Investment, Identifier [Axis]: Schwab, Self-directed brokerage accounts |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
Schwab [Member]
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| Investment, Identifier [Axis]: Series of Transactions in Excess of Five Percent of Total Plan Assets: Vanguard Institutional 500 Index Trust |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
Vanguard [Member]
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| EBP, Description of Investment Including Maturity Date, Rate of Interest, Collateral, Par, or Maturity Value |
Institutional 500 Index Trust [Member]
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| EBP, Purchase Price |
$ 0
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| EBP, Selling Price |
354,794,231
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| EBP, Cost of Asset |
272,617,000
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| EBP, Current Value of Asset on Transaction Date |
354,794,231
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| EBP, Net Gain or (Loss) |
$ 82,177,231
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| Investment, Identifier [Axis]: Series of Transactions in Excess of Five Percent of Total Plan Assets: Vanguard Institutional 500 Index Trust Unit Class C |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
Vanguard [Member]
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| EBP, Description of Investment Including Maturity Date, Rate of Interest, Collateral, Par, or Maturity Value |
Institutional 500 Index Trust Unit Class C [Member]
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| EBP, Purchase Price |
$ 317,436,378
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| EBP, Selling Price |
0
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| EBP, Cost of Asset |
0
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| EBP, Current Value of Asset on Transaction Date |
317,436,378
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| EBP, Net Gain or (Loss) |
$ 0
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| Investment, Identifier [Axis]: Series of Transactions in Excess of Five Percent of Total Plan Assets: Vanguard Institutional Total International Stock Market Index Trust |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
Vanguard [Member]
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| EBP, Description of Investment Including Maturity Date, Rate of Interest, Collateral, Par, or Maturity Value |
Institutional Total International Stock Market Index Trust [Member]
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| EBP, Purchase Price |
$ 0
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| EBP, Selling Price |
265,190,441
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| EBP, Cost of Asset |
207,001,224
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| EBP, Current Value of Asset on Transaction Date |
265,190,441
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| EBP, Net Gain or (Loss) |
$ 58,189,217
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| Investment, Identifier [Axis]: Series of Transactions in Excess of Five Percent of Total Plan Assets: Vanguard Institutional Total International Stock Market Index Trust Unit Class C |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
Vanguard [Member]
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| EBP, Description of Investment Including Maturity Date, Rate of Interest, Collateral, Par, or Maturity Value |
Institutional Total International Stock Market Index Trust Unit Class C [Member]
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| EBP, Purchase Price |
$ 220,309,834
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| EBP, Selling Price |
0
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| EBP, Cost of Asset |
0
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| EBP, Current Value of Asset on Transaction Date |
220,309,834
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| EBP, Net Gain or (Loss) |
$ 0
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| Investment, Identifier [Axis]: Single Transactions in Excess of Five Percent of Total Plan Assets: Vanguard Institutional 500 Index Trust |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
Vanguard [Member]
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| EBP, Description of Investment Including Maturity Date, Rate of Interest, Collateral, Par, or Maturity Value |
Institutional 500 Index Trust [Member]
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| EBP, Purchase Price |
$ 0
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| EBP, Selling Price |
305,962,428
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| EBP, Cost of Asset |
230,939,193
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| EBP, Current Value of Asset on Transaction Date |
305,962,428
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| EBP, Net Gain or (Loss) |
$ 75,023,235
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| Investment, Identifier [Axis]: Single Transactions in Excess of Five Percent of Total Plan Assets: Vanguard Institutional 500 Index Trust Unit Class C |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
Vanguard [Member]
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| EBP, Description of Investment Including Maturity Date, Rate of Interest, Collateral, Par, or Maturity Value |
Institutional 500 Index Trust Unit Class C [Member]
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| EBP, Purchase Price |
$ 305,878,217
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| EBP, Selling Price |
0
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| EBP, Cost of Asset |
0
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| EBP, Current Value of Asset on Transaction Date |
305,878,217
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| EBP, Net Gain or (Loss) |
$ 0
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| Investment, Identifier [Axis]: Single Transactions in Excess of Five Percent of Total Plan Assets: Vanguard Institutional Total International Stock Market Index Trust |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
Vanguard [Member]
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| EBP, Description of Investment Including Maturity Date, Rate of Interest, Collateral, Par, or Maturity Value |
Institutional Total International Stock Market Index Trust [Member]
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| EBP, Purchase Price |
$ 0
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| EBP, Selling Price |
212,229,089
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| EBP, Cost of Asset |
161,738,045
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| EBP, Current Value of Asset on Transaction Date |
212,229,089
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| EBP, Net Gain or (Loss) |
$ 50,491,044
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| Investment, Identifier [Axis]: Single Transactions in Excess of Five Percent of Total Plan Assets: Vanguard Institutional Total International Stock Market Index Trust Unit Class C |
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| EBP, Schedule of Reportable Transaction [Line Items] |
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| EBP, Identity of Party Involved |
Vanguard [Member]
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| EBP, Description of Investment Including Maturity Date, Rate of Interest, Collateral, Par, or Maturity Value |
Institutional Total International Stock Market Index Trust Unit Class C [Member]
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| EBP, Purchase Price |
$ 212,192,792
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| EBP, Selling Price |
0
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| EBP, Cost of Asset |
0
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| EBP, Current Value of Asset on Transaction Date |
212,192,792
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| EBP, Net Gain or (Loss) |
$ 0
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