Profit Sharing Plan and Retirement Plan	12 Months Ended
	Dec. 31, 2022
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 $2.2 million, $2.2 million, and $2.3 million, for the years ended December 31, 2022, 2021 and 2020, respectively.