Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Total revenue	$ 1,822,467	$ 1,636,932
Operating expenses:
Salaries, wages, and benefits	692,907	536,742
Fuel	234,589	187,759
Operations and maintenance	134,633	99,311
Insurance and claims	122,446	138,039
Operating taxes and licenses	31,329	25,890
Communications	7,533	5,749
Depreciation and amortization of property and equipment	181,865	155,966
Amortization of intangibles	18,543	16,183
Rental expense	42,996	15,068
Purchased transportation	277,257	280,729
Impairments	3,982	0
Miscellaneous operating expenses	53,832	30,709
Total operating expenses	1,801,912	1,492,145
Operating income	20,555	144,787
Other (expenses) income:
Interest income	5,022	5,049
Interest expense	(41,236)	(23,091)
Other income, net	8,992	9,703
Total other (expenses) income, net	(27,222)	(8,339)
(Loss) Income before income taxes	(6,667)	136,448
Income tax (benefit) expense	(3,674)	32,735
Net (loss) income	(2,993)	103,713
Net loss attributable to noncontrolling interest	358	571
Net (loss) income attributable to Knight-Swift	(2,635)	104,284
Other comprehensive (loss) income	(38)	1,090
Comprehensive (loss) income	$ (2,673)	$ 105,374
(Loss) Earnings per share:
Basic (in dollars per share)	$ (0.02)	$ 0.65
Diluted (in dollars per share)	(0.02)	0.64
Dividends declared per share: (in dollars per share)	$ 0.16	$ 0.14
Weighted average shares outstanding:
Basic (in shares)	161,511	160,915
Diluted (in shares)	162,086	161,900
Revenue, excluding truckload and LTL fuel surcharge
Total revenue	$ 1,612,814	$ 1,450,293
Truckload and LTL fuel surcharge
Total revenue	$ 209,653	$ 186,639