CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 90,019	$ 109,015
Restricted cash	28,543	30,398
Accounts receivable, net of allowance for doubtful accounts of $10,558 and $11,182 as of March 31, 2013 and December 31, 2012, respectively	182,503	209,915
Inventories	70,780	71,255
Note receivable	10,373	10,298
Deferred income taxes, current portion	6,643	6,800
Prepaid expenses, deposits and other current assets	46,448	46,982
Total current assets	435,309	484,663
Property and equipment, at cost	839,031	848,622
Less: accumulated depreciation	(458,347)	(471,745)
Net property and equipment	380,684	376,877
Goodwill	782,762	801,328
Intangible assets, net	99,375	84,291
Equity investments	312,069	316,234
Other assets	124,027	123,515
Total assets	2,134,226	2,186,908
Current liabilities:
Debt payments due within one year	16,895	16,458
Accounts payable	76,248	80,872
Accrued liabilities	141,772	159,017
Total current liabilities	234,915	256,347
Deferred income taxes	62,315	62,265
Other long-term liabilities	69,999	51,797
Long-term debt, excluding current installments	1,450,847	1,451,708
Total liabilities	1,818,076	1,822,117
Commitments and contingencies
Stockholders' equity:
Class A common stock, par value $0.01 per share, 199,300 shares authorized, 100,119 and 99,301 shares issued and 84,987 and 84,395 shares outstanding as of March 31, 2013 and December 31, 2012, respectively	1,001	993
Additional paid-in capital	720,490	715,910
Accumulated loss	(219,371)	(206,218)
Treasury stock, at cost, 15,132 and 14,906 shares held as of March 31, 2013 and December 31, 2012, respectively	(144,882)	(142,917)
Accumulated other comprehensive loss	(41,088)	(2,977)
Total stockholders' equity	316,150	364,791
Total liabilities and stockholders’ equity	$ 2,134,226	$ 2,186,908