CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 245,580	$ 261,478	$ 169,078
Other comprehensive income (loss):
Foreign currency translation adjustments	2,426	(1,381)	(2,867)
Change in fair value of interest rate swaps, net of tax	6,886	3,610	(5,238)
Other comprehensive income (loss)	9,312	2,229	(8,105)
Comprehensive income	254,892	263,707	160,973
Comprehensive income attributable to noncontrolling interest	(4,324)	(2,426)	0
Comprehensive income attributable to Werner	$ 250,568	$ 261,281	$ 160,973