CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME
Operating revenue	$ 202,130	$ 170,031	$ 403,193	$ 328,536
Operating expenses:
Salaries, wages and employee benefits	42,238	36,488	84,125	73,043
Fuel and fuel taxes	22,638	12,414	39,675	23,858
Depreciation and amortization	8,986	9,163	17,010	18,733
Insurance and claims	7,046	5,181	13,669	10,990
Equipment rent	1,526	2,048	3,360	3,997
Operations and maintenance	9,925	8,783	18,440	15,849
Purchased transportation	95,692	82,938	194,011	157,041
Operating taxes and licenses	1,273	1,323	2,533	2,595
Communications and utilities	735	796	1,741	1,600
Gain on disposal of assets, net	(881)	(140)	(7,282)	(317)
Merger costs	2,132	0	2,132
Other	4,968	4,108	9,244	8,172
Total operating expenses	196,278	163,102	378,658	315,561
Operating income	5,852	6,929	24,535	12,975
Other expenses:
Interest expense, net	1,542	1,014	2,959	2,039
Other, net	84	49	152	110
Total other expenses, net	1,626	1,063	3,111	2,149
Income before income taxes	4,226	5,866	21,424	10,826
Income tax expense	1,027	1,673	5,114	3,036
Consolidated net income and comprehensive income	$ 3,199	$ 4,193	$ 16,310	$ 7,790
Net earnings per share:
Average shares outstanding (basic) (in shares)	8,876	8,806	8,904	8,826
Basic earnings per share (in dollars per share)	$ 0.36	$ 0.48	$ 1.83	$ 0.88
Average shares outstanding (diluted) (in shares)	8,987	8,947	9,062	8,976
Diluted earnings per share (in dollars per share)	$ 0.36	$ 0.47	$ 1.80	$ 0.87