Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
OPERATING REVENUES:
Revenue, before fuel surcharge	$ 82,684	$ 74,896
Fuel surcharge	16,799	22,924
Total operating revenues	99,483	97,820
OPERATING EXPENSES AND COSTS:
Salaries, wages and benefits	25,933	26,035
Operating supplies and expenses	23,165	34,166
Rents and purchased transportation	29,057	20,761
Depreciation	7,557	9,126
Insurance and claims	3,406	3,742
Other	2,379	2,411
Gain on disposition of equipment	(1,161)	(1,266)
Total operating expenses and costs	90,336	94,975
OPERATING INCOME	9,147	2,845
NON-OPERATING INCOME	245	272
INTEREST EXPENSE	(617)	(862)
INCOME BEFORE INCOME TAXES	8,775	2,255
FEDERAL AND STATE INCOME TAX EXPENSE:
Current	418	120
Deferred	2,988	778
Total federal and state income tax expense	3,406	898
NET INCOME	$ 5,369	$ 1,357
INCOME PER COMMON SHARE:
Basic (in Dollars per share)	$ 0.72	$ 0.17
Diluted (in Dollars per share)	$ 0.72	$ 0.17
AVERAGE COMMON SHARES OUTSTANDING:
Basic (in Shares)	7,425	7,985
Diluted (in Shares)	7,467	8,033