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Profit Sharing Plan and Retirement Plan | 12 Months Ended
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Dec. 31, 2023
Profit Sharing Plan and Retirement Plan [Abstract] |
Profit Sharing Plan and Retirement Plan | Profit Sharing Plan and Retirement PlanWe have retirement savings plans (the “Retirement Savings Plans”) for substantially all employees who have completed one year of service and are 19 years of age or older. Employees may make 401(k) contributions subject to Internal Revenue Code limitations. The Retirement Savings Plans provide for a discretionary profit sharing contribution to non-driver employees and a matching contribution of a discretionary percentage to driver employees ("Heartland Plan"). Acquired entities also have retirement savings plans that generally have the aforementioned characteristics of the Heartland Plan, but are for employees of the respective entities. Our contributions to the Retirement Savings Plans totaled approximately $3.1 million, $2.2 million, and $2.2 million, for the years ended December 31, 2023, 2022 and 2021, respectively.

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- Definition Profit Sharing Plan and Retirement Plan [Abstract] + References No definition available. + Details
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- Definition The entire disclosure for an entity's employee compensation and benefit plans, including, but not limited to, postemployment and postretirement benefit plans, defined benefit pension plans, defined contribution plans, non-qualified and supplemental benefit plans, deferred compensation, share-based compensation, life insurance, severance, health care, unemployment and other benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 710 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//710/tableOfContent Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 712 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//712/tableOfContent Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//715/tableOfContent Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//718/tableOfContent + Details
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