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 Income (Loss)	Treasury Stock	Stockholders' Equity, Total	Temporary Equity - Redeemable Noncontrolling Interest
BALANCE at Dec. 31, 2020		$ 805	$ 116,039	$ 1,438,916	$ (22,833)	$ (337,887)	$ 1,195,040	$ 0
Net income attributable to Werner	$ 46,492	0	0	46,492	0	0	46,492	0
Net income attributable to noncontrolling interest	0
Other comprehensive income (loss)	(265)	0	0	0	(265)	0	(265)	0
Purchases of common stock		0	0	0	0	(5,507)	(5,507)	0
Dividends on common stock		0	0	6,792	0	0	(6,792)	0
Equity compensation activity		0	(3,953)	0	0	213	(3,740)	0
Non-cash equity compensation expense		0	2,502	0	0	0	2,502	0
BALANCE at Mar. 31, 2021		805	114,588	1,478,616	(23,098)	(343,181)	1,227,730	0
BALANCE at Dec. 31, 2021		805	121,904	1,667,104	(20,604)	(441,659)	1,327,550	35,947
Net income attributable to Werner	53,749	0	0	53,749	0	0	53,749	0
Net income attributable to noncontrolling interest	1,286	0	0	0	0	0	0	1,286
Other comprehensive income (loss)	$ 4,784	0	0	0	4,784	0	4,784	0
Purchases of common stock		0	0	0	0	(36,180)	(36,180)	0
Dividends on common stock		0	0	(7,807)	0	0	(7,807)	0
Equity compensation activity		0	(3,773)	0	0	115	(3,658)	0
Non-cash equity compensation expense		0	3,026	0	0	0	3,026	0
BALANCE at Mar. 31, 2022		$ 805	$ 121,157	$ 1,713,046	$ (15,820)	$ (477,724)	$ 1,341,464	$ 37,233