Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
OPERATING REVENUES:
Revenue, before fuel surcharge	$ 92,076	$ 82,158	$ 265,813	$ 237,660
Fuel surcharge	15,034	24,901	48,813	71,563
Total operating revenues	107,110	107,059	314,626	309,223
OPERATING EXPENSES AND COSTS:
Salaries, wages and benefits	26,533	28,333	79,032	81,400
Operating supplies and expenses	21,912	31,696	69,202	98,560
Rent and purchased transportation	35,255	23,037	97,883	65,756
Depreciation	8,452	9,037	23,753	27,329
Insurance and claims	3,889	4,475	11,246	12,125
Other	2,200	2,657	6,867	7,582
Gain on disposition of equipment	(1,357)	(626)	(4,611)	(3,414)
Total operating expenses and costs	96,884	98,609	283,372	289,338
OPERATING INCOME	10,226	8,450	31,254	19,885
NON-OPERATING (EXPENSE) INCOME	(732)	594	385	1,125
INTEREST EXPENSE	(132)	(632)	(1,992)	(2,238)
INCOME BEFORE INCOME TAXES	9,362	8,412	29,647	18,772
Current	337	569	1,176	1,185
Deferred	3,230	2,786	10,268	6,228
Total federal and state income tax expense	3,567	3,355	11,444	7,413
NET INCOME	$ 5,795	$ 5,057	$ 18,203	$ 11,359
INCOME PER COMMON SHARE:
Basic (in dollars per share)	$ 0.81	$ 0.63	$ 2.48	$ 1.42
Diluted (in dollars per share)	$ 0.80	$ 0.63	$ 2.46	$ 1.41
Basic (in shares)	7,186	7,993	7,346	7,990
Diluted (in shares)	7,219	8,032	7,385	8,034