Condensed Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue
Operating revenue	$ 133,974	$ 125,013
Operating expenses
Salaries, wages and employee benefits	36,090	32,237
Fuel and fuel taxes	13,631	13,479
Depreciation and amortization	8,818	7,180
Equipment rent	2,720	2,718
Insurance and claims	7,280	5,602
Operations and maintenance	7,273	7,961
Purchased transportation	48,281	49,038
Operating taxes and licenses	1,117	502
Communications and utilities	767	713
Gain on disposal of assets, net	(145)	(169)
Restructuring, impairment and other costs (reversal)	0	(639)
Other	4,221	3,999
Total operating expenses	130,053	122,621
Operating income	3,921	2,392
Other expenses
Interest expense, net	1,741	818
Other, net	137	120
Total other expenses, net	1,878	938
Income before income taxes	2,043	1,454
Income tax expense	542	419
Consolidated net income and comprehensive income	$ 1,501	$ 1,035
Net earnings per share
Average shares outstanding (basic) (in shares)	8,375	8,035
Basic earnings per share (in usd per share)	$ 0.18	$ 0.13
Average shares outstanding (diluted) (in shares)	8,399	8,040
Diluted earnings per share (in usd per shares)	$ 0.18	$ 0.13