CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 100,403	$ 104,402
Accounts receivable, net of allowance for doubtful accounts of $5,100 and $4,782 as of March 31, 2012 and December 31, 2011, respectively	177,398	182,467
Inventories	79,825	79,742
Deferred income taxes, current portion	4,799	4,697
Prepaid expenses, deposits and other current assets	36,972	35,805
Total current assets	399,397	407,113
Property and equipment, at cost	803,782	788,529
Less: accumulated depreciation	(384,266)	(362,041)
Net Property and equipment	419,516	426,488
Goodwill, net	779,567	768,318
Intangible assets, net	85,351	86,859
Equity investments	356,292	340,494
Other assets	136,020	132,629
Total assets	2,176,143	2,161,901
Current liabilities:
Debt payments due within one year	33,819	26,191
Accounts payable	52,055	66,221
Accrued liabilities	138,902	144,671
Total current liabilities	224,776	237,083
Deferred income taxes	57,248	56,264
Other long-term liabilities	62,969	60,364
Long-term debt, excluding current installments	1,353,566	1,364,476
Total liabilities	1,698,559	1,718,187
Commitments and contingencies
Stockholders' equity:
Class A common stock, par value $0.01 per share, 199,300 shares authorized, 98,505 and 98,181 shares issued and 92,756 and 92,433 shares outstanding as of March 31, 2012 and December 31, 2011, respectively	985	982
Additional paid-in capital	700,226	693,600
Accumulated loss	(141,772)	(143,591)
Treasury stock, at cost, 5,749 shares held as of March 31, 2012 and December 31, 2011	(74,460)	(74,460)
Accumulated other comprehensive loss	(7,395)	(32,817)
Total stockholders' equity	477,584	443,714
Total liabilities and stockholders' equity	$ 2,176,143	$ 2,161,901