Earnings Per Share - Schedule of Basic And Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Net income attributable to Werner	$ 35,224	$ 53,749
Weighted average common shares outstanding (in shares)	63,306	65,543
Dilutive effect of stock-based awards (in shares)	389	335
Shares used in computing diluted earnings per share (in shares)	63,695	65,878
Basic earnings per share (in dollars per share)	$ 0.56	$ 0.82
Diluted earnings per share (in dollars per share)	$ 0.55	$ 0.82