CONDENSED CONSOLIDATED STATEMENTS OF (LOSS) INCOME AND COMPREHENSIVE (LOSS) INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
CONDENSED CONSOLIDATED STATEMENTS OF (LOSS) INCOME AND COMPREHENSIVE (LOSS) INCOME
Operating revenue	$ 141,786	$ 130,924	$ 392,296	$ 398,520
Operating expenses:
Salaries, wages and employee benefits	34,916	32,846	104,397	102,742
Fuel and fuel taxes	9,734	13,842	29,679	41,575
Depreciation and amortization	9,896	9,652	29,941	27,595
Insurance and claims	5,388	6,499	15,254	20,939
Equipment rent	2,479	2,427	7,107	7,715
Operations and maintenance	9,310	8,829	26,812	24,583
Purchased transportation	59,617	51,281	156,707	148,634
Operating taxes and licenses	1,167	1,218	3,675	3,646
Communications and utilities	867	967	2,586	2,453
Loss (gain) on disposal of assets, net	398	(696)	420	(700)
Asset impairments	0	1	588	368
Other	3,580	4,092	12,008	13,100
Total operating expenses	137,352	130,958	389,174	392,650
Operating income (loss)	4,434	(34)	3,122	5,870
Other expenses:
Interest expense, net	1,416	1,615	4,335	4,951
Other, net	57	145	167	453
Total other expenses, net	1,473	1,760	4,502	5,404
Income (loss) before income taxes	2,961	(1,794)	(1,380)	466
Income tax expense (benefit)	666	(421)	(193)	337
Consolidated net income (loss) and comprehensive income (loss)	$ 2,295	$ (1,373)	$ (1,187)	$ 129
Net earnings (loss) per share:
Average shares outstanding (basic) (in shares)	8,807	8,564	8,762	8,509
Basic earnings (loss) per share (in dollars per share)	$ 0.26	$ (0.16)	$ (0.14)	$ 0.02
Average shares outstanding (diluted) (in shares)	8,955	8,564	8,762	8,522
Diluted earnings (loss) per share (in dollars per share)	$ 0.26	$ (0.16)	$ (0.14)	$ 0.02