Revenue (Disaggregation of Revenue by Revenue Source) (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Disaggregation of revenue
Revenues	$ 764,605	$ 616,446
Truckload Transportation Services
Disaggregation of revenue
Revenues	558,417	462,949
Werner Logistics
Disaggregation of revenue
Revenues	189,008	137,853
Inter-segment eliminations
Disaggregation of revenue
Revenues	(722)	(134)
Transportation Services
Disaggregation of revenue
Revenues	746,703	600,668
Other revenues
Disaggregation of revenue
Revenues	$ 17,902	$ 15,778

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details