Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Operating revenue
Total Operating Revenue	$ 547,828	$ 491,140	$ 1,618,719	$ 1,416,921
Operating expenses
Salaries, wages, and benefits	188,430	158,942	538,876	445,445
Fuel and fuel taxes	86,406	46,715	240,702	130,902
Vehicle rents	26,237	22,700	74,867	65,710
Depreciation and amortization, net of (gain) loss on sale of property	23,187	19,509	56,833	65,096
Operating expenses and supplies	51,339	38,683	143,832	105,641
Insurance premiums and claims	43,912	18,242	87,452	58,952
Operating taxes and licenses	4,112	3,677	11,780	10,193
Communications and utilities	3,707	2,677	11,115	8,029
General and other operating expenses	19,703	14,208	55,440	45,112
Total operating expenses	570,568	484,505	1,635,201	1,393,382
Operating income (loss)	(22,740)	6,635	(16,482)	23,539
Other expense
Interest expense, net	4,588	3,572	12,981	10,816
Other expense (income)	(131)	12,062	8,731	(8,129)
Nonoperating Income (Expense), Total	4,457	15,634	21,712	2,687
Income (loss) before income tax provision	(27,197)	(8,999)	(38,194)	20,852
Income tax provision (benefit)	(7,786)	(3,361)	(9,856)	4,732
Net total and comprehensive income (loss)	(19,411)	(5,638)	(28,338)	16,120
Net total and comprehensive income (loss) attributable to noncontrolling interest	379	(160)	908	(36)
Net total and comprehensive income (loss) attributable to controlling interest	$ (19,790)	$ (5,478)	$ (29,246)	$ 16,156
Earnings (loss) per share
Basic earnings (loss) per share (in dollars per share)	$ (0.38)	$ (0.11)	$ (0.57)	$ 0.32
Basic weighted average shares outstanding (in shares)	51,562	50,563	51,213	50,293
Diluted earnings (loss) per share (in dollars per share)	$ (0.38)	$ (0.11)	$ (0.57)	$ 0.31
Diluted weighted average shares outstanding (in shares)	51,562	50,563	51,213	51,839
Cargo and Freight
Operating revenue
Total Operating Revenue	$ 477,428	$ 451,824	$ 1,420,940	$ 1,306,998
Fuel Surcharge
Operating revenue
Total Operating Revenue	70,400	39,316	197,779	109,923
Shipping and Handling
Operating expenses
Purchased transportation	$ 123,535	$ 159,152	$ 414,304	$ 458,302