Consolidated Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 25,938	$ 27,417
Accounts receivable, net	153,331	132,225
Materials and supplies	15,524	13,259
Prepaid expenses and other	12,559	14,529
Deferred income tax assets, net	21,889	21,518
Total current assets	229,241	208,948
PROPERTY AND EQUIPMENT, net	1,503,388	1,444,177
GOODWILL	162,737	160,629
INTANGIBLE ASSETS, net	235,029	237,355
DEFERRED INCOME TAX ASSETS, net	2,420	2,879
OTHER ASSETS, net	13,144	13,572
Total assets	2,145,959	2,067,560
LIABILITIES AND STOCKHOLDERS' EQUITY
Current portion of long-term debt	102,771	103,690
Accounts payable	132,258	124,948
Accrued expenses	51,806	76,248
Total current liabilities	286,835	304,886
LONG-TERM DEBT, less current portion	462,150	475,174
DEFERRED INCOME TAX LIABILITIES, net	274,325	263,361
DEFERRED ITEMS - grants from outside parties	190,796	183,356
OTHER LONG-TERM LIABILITIES	28,135	23,543
COMMITMENTS AND CONTINGENCIES	0	0
STOCKHOLDERS' EQUITY:
Additional paid-in capital	375,975	358,024
Retained earnings	675,452	622,185
Accumulated other comprehensive income	56,656	40,114
Treasury stock, at cost	(204,912)	(203,626)
Total stockholders' equity	903,718	817,240
Total liabilities and stockholders' equity	2,145,959	2,067,560
Class A
STOCKHOLDERS' EQUITY:
Common Stock	525	519
Class B
STOCKHOLDERS' EQUITY:
Common Stock	$ 22	$ 24