CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 112,431	$ 104,402
Accounts receivable, net of allowance for doubtful accounts of $7,287 and $4,782 as of June 30, 2012 and December 31, 2011, respectively	166,882	182,467
Inventories	83,584	79,742
Deferred income taxes, current portion	4,862	4,697
Prepaid expenses, deposits and other current assets	38,102	35,805
Total current assets	405,861	407,113
Property and equipment, at cost	806,817	788,529
Less: accumulated depreciation	(404,281)	(362,041)
Net property and equipment	402,536	426,488
Goodwill	777,738	768,782
Intangible assets, net	87,025	86,859
Equity investments	309,418	340,494
Other assets	140,772	132,629
Total assets	2,123,350	2,162,365
Current liabilities:
Debt payments due within one year	14,783	26,191
Accounts payable	57,832	66,221
Accrued liabilities	134,744	145,135
Total current liabilities	207,359	237,547
Deferred income taxes	57,663	56,264
Other long-term liabilities	62,355	60,364
Long-term debt, excluding current installments	1,354,920	1,364,476
Total liabilities	1,682,297	1,718,651
Commitments and contingencies
Stockholders' equity:
Class A common stock, par value $0.01 per share, 199,300 shares authorized, 98,576 and 98,181 shares issued and 92,602 and 92,433 shares outstanding as of June 30, 2012 and December 31, 2011, respectively	986	982
Additional paid-in capital	706,037	693,600
Accumulated loss	(154,361)	(143,591)
Treasury stock, at cost, 5,974 and 5,749 shares held as of June 30, 2012 and December 31, 2011, respectively	(76,355)	(74,460)
Accumulated other comprehensive loss	(35,254)	(32,817)
Total stockholders' equity	441,053	443,714
Total liabilities and stockholders' equity	$ 2,123,350	$ 2,162,365