Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net income	$ 261,478	$ 169,078	$ 166,944
Other comprehensive income (loss):
Foreign currency translation adjustments	(1,381)	(2,867)	1,996
Change in fair value of interest rate swaps, net of tax	3,610	(5,238)	(651)
Other comprehensive income (loss)	2,229	(8,105)	1,345
Comprehensive income	263,707	160,973	168,289
Comprehensive income attributable to noncontrolling interest	(2,426)	0	0
Comprehensive income attributable to Werner	$ 261,281	$ 160,973	$ 168,289