For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
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SEGMENT INFORMATION - Narratives (Details) $ in Millions	12 Months Ended
SEGMENT INFORMATION - Narratives (Details) $ in Millions	Dec. 31, 2023 reporting_unit segment	Dec. 31, 2022	Dec. 31, 2021	Feb. 26, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments	2
Gain realized on transaction closure \| $				$ 1.0
Truckload Transportation Services
Segment Reporting Information [Line Items]
Number of operating units	2
Werner Logistics
Segment Reporting Information [Line Items]
Number of operating units \| reporting_unit	3
Dollar General \| Revenue Benchmark \| Customer Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk (as a percent)	10.00%	14.00%	14.00%