CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY AND TEMPORARY EQUITY - REDEEMABLE NONCONTROLLING INTEREST - USD ($) $ in Thousands	Total	Common Stock	Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
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	88,809			88,809
Other comprehensive income (loss)	2,642				2,642
Dividends on common stock	(25,988)			(25,988)
Equity compensation activity	(5,554)		(5,470)			(84)
Non-cash equity compensation expense	8,671		8,671
Ending balance at Sep. 30, 2023	1,512,215	805	133,038	1,938,694	(8,650)	(551,672)
Beginning balance at Dec. 31, 2022	38,699
Increase (Decrease) in Temporary Equity [Roll Forward]
Net (loss) income attributable to noncontrolling interest	249
Ending balance at Sep. 30, 2023	38,948
Beginning balance at Jun. 30, 2023	1,497,070	805	130,694	1,923,865	(6,623)	(551,671)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to Werner	23,704			23,704
Other comprehensive income (loss)	(2,027)				(2,027)
Dividends on common stock	(8,875)			(8,875)
Equity compensation activity	(37)		(36)			(1)
Non-cash equity compensation expense	2,380		2,380
Ending balance at Sep. 30, 2023	1,512,215	805	133,038	1,938,694	(8,650)	(551,672)
Beginning balance at Jun. 30, 2023	39,148
Increase (Decrease) in Temporary Equity [Roll Forward]
Net (loss) income attributable to noncontrolling interest	(200)
Ending balance at Sep. 30, 2023	38,948
Beginning balance at Dec. 31, 2023	1,528,339	805	134,894	1,953,385	(9,684)	(551,061)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to Werner	22,342			22,342
Other comprehensive income (loss)	(11,753)				(11,753)
Repurchases of common stock	(67,086)					(67,086)
Dividends on common stock	(26,184)			(26,184)
Equity compensation activity	(4,172)		(4,746)			574
Non-cash equity compensation expense	7,071		7,071
Ending balance at Sep. 30, 2024	1,448,557	805	137,219	1,949,543	(21,437)	(617,573)
Beginning balance at Dec. 31, 2023	38,607
Increase (Decrease) in Temporary Equity [Roll Forward]
Net (loss) income attributable to noncontrolling interest	(354)
Ending balance at Sep. 30, 2024	38,253
Beginning balance at Jun. 30, 2024	1,455,227	805	134,769	1,951,631	(14,405)	(617,573)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to Werner	6,565			6,565
Other comprehensive income (loss)	(7,032)				(7,032)
Dividends on common stock	(8,653)			(8,653)
Non-cash equity compensation expense	2,450		2,450
Ending balance at Sep. 30, 2024	1,448,557	$ 805	$ 137,219	$ 1,949,543	$ (21,437)	$ (617,573)
Beginning balance at Jun. 30, 2024	38,278
Increase (Decrease) in Temporary Equity [Roll Forward]
Net (loss) income attributable to noncontrolling interest	(25)
Ending balance at Sep. 30, 2024	$ 38,253