Consolidated Statements of Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Operating Revenue	$ 135,010	$ 132,529	$ 409,552	$ 397,413
Operating Expenses
Salaries, wages, and benefits	40,899	40,903	125,857	124,832
Rent and purchased transportation	1,495	1,832	4,752	5,767
Fuel	42,443	40,966	126,259	122,421
Operations and maintenance	6,468	5,257	18,371	16,504
Operating taxes and licenses	2,122	2,400	6,445	6,952
Insurance and claims	4,832	3,920	11,297	10,373
Communications and utilities	756	770	2,249	2,141
Depreciation	14,250	14,900	42,184	40,942
Other operating expenses	3,752	3,248	11,379	10,119
Gain on disposal of property and equipment	(1,674)	(6,799)	(9,433)	(22,329)
Total operating expenses	115,343	107,397	339,360	317,722
Operating income	19,667	25,132	70,192	79,691
Interest income	191	174	500	620
Income before income taxes	19,858	25,306	70,692	80,311
Federal and state income taxes	7,424	9,907	23,443	27,501
Net income	12,434	15,399	47,249	52,810
Other comprehensive income	0	0	1,797	0
Comprehensive Income	$ 12,434	$ 15,399	$ 49,046	$ 52,810
Earnings per share
Basic	$ 0.15	$ 0.17	$ 0.55	$ 0.58
Diluted	$ 0.14	$ 0.17	$ 0.55	$ 0.58
Weighted average shares outstanding
Basic	85,646	90,129	86,189	90,500
Diluted	85,925	90,129	86,508	90,500
Dividends declared per share	$ 0.02	$ 0.02	$ 0.06	$ 0.06