CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY AND TEMPORARY EQUITY - REDEEMABLE NONCONTROLLING INTEREST (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Beginning balance at Dec. 31, 2021	$ 1,327,550	$ 805	$ 121,904	$ 1,667,104	$ (20,604)	$ (441,659)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to Werner	126,039			126,039
Net income attributable to noncontrolling interest	0
Other comprehensive income	6,020				6,020
Purchases of common stock	(102,113)					(102,113)
Dividends on common stock	(16,051)			(16,051)
Equity compensation activity	(3,658)		(3,924)			266
Non-cash equity compensation expense	6,085		6,085
Ending balance at Jun. 30, 2022	1,343,872	805	124,065	1,777,092	(14,584)	(543,506)
Beginning balance at Dec. 31, 2021	35,947
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income attributable to noncontrolling interest	2,605
Ending balance at Jun. 30, 2022	38,552
Beginning balance at Mar. 31, 2022	1,341,464	805	121,157	1,713,046	(15,820)	(477,724)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to Werner	72,290			72,290
Net income attributable to noncontrolling interest	0
Other comprehensive income	1,236				1,236
Purchases of common stock	(65,933)					(65,933)
Dividends on common stock	(8,244)			(8,244)
Equity compensation activity	0		(151)			151
Non-cash equity compensation expense	3,059		3,059
Ending balance at Jun. 30, 2022	1,343,872	805	124,065	1,777,092	(14,584)	(543,506)
Beginning balance at Mar. 31, 2022	37,233
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income attributable to noncontrolling interest	1,319
Ending balance at Jun. 30, 2022	38,552
Beginning balance at Dec. 31, 2022	1,443,635	805	129,837	1,875,873	(11,292)	(551,588)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to Werner	65,105			65,105
Net income attributable to noncontrolling interest	0
Other comprehensive income	4,669				4,669
Dividends on common stock	(17,113)			(17,113)
Equity compensation activity	(5,517)		(5,434)			(83)
Non-cash equity compensation expense	6,291		6,291
Ending balance at Jun. 30, 2023	1,497,070	805	130,694	1,923,865	(6,623)	(551,671)
Beginning balance at Dec. 31, 2022	38,699
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income attributable to noncontrolling interest	449
Ending balance at Jun. 30, 2023	39,148
Beginning balance at Mar. 31, 2023	1,470,537	805	128,050	1,902,858	(9,264)	(551,912)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to Werner	29,881			29,881
Net income attributable to noncontrolling interest	0
Other comprehensive income	2,641				2,641
Dividends on common stock	(8,874)			(8,874)
Equity compensation activity	(3)		(244)			241
Non-cash equity compensation expense	2,888		2,888
Ending balance at Jun. 30, 2023	1,497,070	$ 805	$ 130,694	$ 1,923,865	$ (6,623)	$ (551,671)
Beginning balance at Mar. 31, 2023	39,009
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income attributable to noncontrolling interest	139
Ending balance at Jun. 30, 2023	$ 39,148