CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 78,084	$ 109,015
Restricted cash	28,588	30,398
Accounts receivable, net of allowance for doubtful accounts of $11,165 and $11,228 as of June 30, 2013 and December 31, 2012, respectively	189,809	209,870
Notes receivable	10,410	10,298
Inventories	67,362	71,255
Deferred income taxes, current portion	6,178	6,800
Prepaid expenses, deposits and other current assets	46,942	46,982
Total current assets	427,373	484,618
Property and equipment, at cost	853,534	848,622
Less: accumulated depreciation	(479,426)	(471,745)
Net property and equipment	374,108	376,877
Goodwill	781,418	801,373
Intangible assets, net	94,941	84,291
Equity investments	298,917	316,234
Other assets	126,546	123,515
Total assets	2,103,303	2,186,908
Current liabilities:
Debt payments due within one year	10,269	16,458
Accounts payable	62,447	80,872
Accrued liabilities	140,508	159,017
Total current liabilities	213,224	256,347
Deferred income taxes	63,254	62,265
Long-term debt, excluding current installments	1,449,122	1,451,708
Other long-term liabilities	68,066	51,797
Total liabilities	1,793,666	1,822,117
Commitments and contingencies
Stockholders' equity:
Class A common stock, par value $0.01 per share, 199,300 shares authorized, 100,206 and 99,301 shares issued and 85,074 and 84,395 shares outstanding as of June 30, 2013 and December 31, 2012, respectively	1,002	993
Additional paid-in capital	726,148	715,910
Accumulated loss	(232,346)	(206,218)
Treasury stock, at cost, 15,132 and 14,906 shares held as of June 30, 2013 and December 31, 2012, respectively	(144,882)	(142,917)
Accumulated other comprehensive loss	(40,285)	(2,977)
Total stockholders' equity	309,637	364,791
Total liabilities and stockholders' equity	$ 2,103,303	$ 2,186,908