CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 104,402	$ 124,281
Accounts receivable, net of allowance for doubtful accounts of $4,782 and $2,175 in 2011 and 2010, respectively	182,467	178,179
Inventories	81,711	68,744
Deferred income taxes, current portion	4,697	2,448
Prepaid expenses, deposits and other current assets	35,805	40,013
Total current assets	409,082	413,665
Property and equipment, at cost	788,529	776,367
Less: accumulated depreciation	(362,041)	(325,786)
Net property and equipment	426,488	450,581
Goodwill, net	766,349	763,915
Intangible assets, net	86,859	70,613
Equity investments	340,494	321,180
Other assets	132,629	131,584
Total assets	2,161,901	2,151,538
Current liabilities:
Debt payments due within one year	26,191	8,431
Accounts payable	66,221	50,642
Accrued liabilities	144,671	136,925
Total current liabilities	237,083	195,998
Deferred income taxes	56,264	60,858
Other long-term liabilities	60,364	53,765
Long-term debt, excluding current installments	1,364,476	1,388,259
Total liabilities	1,718,187	1,698,880
Commitments and contingencies
Stockholders' equity:
Class A common stock, par value $0.01 per share, 199,300 shares authorized, 98,181 and 97,474 shares issued and 92,433 and 91,725 shares outstanding as of December 31, 2011 and 2010, respectively	982	975
Additional paid-in capital	693,600	674,691
Accumulated loss	(143,591)	(131,021)
Treasury stock, at cost, 5,749 shares held as of December 31, 2011 and 2010	(74,460)	(74,460)
Accumulated other comprehensive loss	(32,817)	(17,527)
Total stockholders' equity	443,714	452,658
Total liabilities and stockholders' equity	$ 2,161,901	$ 2,151,538