UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF INCOME
Operating revenues	$ 61,555	$ 42,361	$ 121,983	$ 83,959
Operating expenses:
Cost of goods and services, exclusive of depreciation and amortization shown separately below	25,216	15,278	51,277	29,336
Selling, general and administrative, exclusive of depreciation and amortization shown separately below	13,901	10,810	27,239	18,590
Depreciation and amortization	14,444	8,483	28,382	16,724
Total operating expenses	53,561	34,571	106,898	64,650
Operating income	7,994	7,790	15,085	19,309
Other income (expense):
Interest expense	(2,846)	(266)	(4,665)	(576)
Gain (loss) on investments, net	(124)	(76)	(249)	(142)
Non-operating income, net	290	182	508	269
Income from continuing operations before income taxes	5,314	7,630	10,679	18,860
Income tax expense	2,276	3,117	4,581	7,766
Net income from continuing operations	3,038	4,513	6,098	11,094
Earnings (loss) from discontinued operations, net of tax (expense) benefit of $31, $(38), $52 and $(150), respectively	(46)	59	(79)	233
Net income	$ 2,992	$ 4,572	$ 6,019	$ 11,327
Basic and diluted income (loss) per share:
Net income from continuing operations	$ 0.13	$ 0.19	$ 0.25	$ 0.47
Net earnings (loss) from discontinued operations	$ 0.00	$ 0.00	$ 0.00	$ 0.01
Net income	$ 0.13	$ 0.19	$ 0.25	$ 0.48
Weighted average shares outstanding, basic	23,772	23,738	23,769	23,718
Weighted average shares, diluted	23,797	23,781	23,823	23,757