CONDENSED CONSOLIDATED STATEMENTS OF (LOSS) INCOME AND COMPREHENSIVE (LOSS) INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
CONDENSED CONSOLIDATED STATEMENTS OF (LOSS) INCOME AND COMPREHENSIVE (LOSS) INCOME
Operating revenue	$ 126,773	$ 133,974
Operating expenses:
Salaries, wages and employee benefits	35,845	36,090
Fuel and fuel taxes	11,863	13,631
Depreciation and amortization	10,011	8,818
Insurance and claims	5,857	7,280
Equipment rent	2,292	2,720
Operations and maintenance	8,896	7,273
Purchased transportation	47,814	48,281
Operating taxes and licenses	1,159	1,117
Communications and utilities	813	767
Loss (gain) on disposal of assets, net	38	(145)
Other	4,497	4,221
Total operating expenses	129,085	130,053
Operating (loss) income	(2,312)	3,921
Other expenses:
Interest expense, net	1,684	1,741
Other, net	46	137
Total other expenses, net	1,730	1,878
(Loss) income before income taxes	(4,042)	2,043
Income tax (benefit) expense	(1,491)	542
Consolidated net (loss) income and comprehensive (loss) income	$ (2,551)	$ 1,501
Net (loss) earnings per share:
Average shares outstanding (basic) (in shares)	8,633	8,375
Basic (loss) earnings per share (in dollars per share)	$ (0.30)	$ 0.18
Average shares outstanding (diluted) (in shares)	8,633	8,399
Diluted (loss) earnings per share (in dollars per share)	$ (0.30)	$ 0.18