Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Current assets:
Cash	$ 87,467	$ 74,504	[1]
Accounts receivable, less allowance of $1,456 in 2011 and $1,996 in 2010	69,574	62,763	[1]
Other current assets	11,836	8,696	[1]
Total current assets	168,877	145,963	[1]
Property and equipment	224,278	213,704	[1]
Less accumulated depreciation and amortization	91,023	87,272	[1]
Total property and equipment, net	133,255	126,432	[1]
Goodwill and other acquired intangibles:
Goodwill	43,332	43,332	[1]
Other acquired intangibles, net of accumulated amortization of $20,314 in 2011 and $16,871 in 2010	27,816	31,259	[1]
Total goodwill and other acquired intangibles	71,148	74,591	[1]
Other assets	1,533	1,810	[1]
Total assets	374,813	348,796	[1]
Current liabilities:
Accounts payable	14,603	10,687	[1]
Accrued expenses	18,035	16,280	[1]
Current portion of debt and capital lease obligations	561	638	[1]
Total current liabilities	33,199	27,605	[1]
Long-term debt and capital lease obligations, less current portion	50,473	50,883	[1]
Other long-term liabilities	8,079	8,106	[1]
Deferred income taxes	12,169	6,116	[1]
Shareholders' equity:
Preferred stock	0	0	[1]
Common stock, $0.01 par value: Authorized shares - 50,000,000, Issued and outstanding shares - 28,476,942 in 2011 and 29,030,919 in 2010	285	290	[1]
Additional paid-in capital	12,552	24,300	[1]
Retained earnings	258,056	231,496	[1]
Total shareholders' equity	270,893	256,086	[1]
Total liabilities and shareholders' equity	$ 374,813	$ 348,796	[1]

[1] Taken from audited financial statements, which are not presented in their entirety.