Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
CURRENT ASSETS:
Cash and cash equivalents	$ 38,973	$ 59,727
Accounts receivable, net	359,116	357,278
Materials and supplies	43,817	30,251
Prepaid expenses and other	40,367	24,176
Deferred income tax assets, net	44,708	76,994
Total current assets	526,981	548,426
PROPERTY AND EQUIPMENT, net	4,086,213	3,788,482
GOODWILL	949,489	628,815
INTANGIBLE ASSETS, net	1,108,629	587,663
DEFERRED INCOME TAX ASSETS, net	1,971	2,500
OTHER ASSETS, net	43,263	39,867
Total assets	6,716,546	5,595,753
CURRENT LIABILITIES:
Current portion of long-term debt	48,784	67,398
Accounts payable	293,944	290,746
Accrued expenses	139,552	106,094
Total current liabilities	482,280	464,238
LONG-TERM DEBT, less current portion	2,250,997	1,548,051
DEFERRED INCOME TAX LIABILITIES, net	1,086,027	908,852
DEFERRED ITEMS - grants from outside parties	288,266	279,286
OTHER LONG-TERM LIABILITIES	$ 178,079	$ 37,346
COMMITMENTS AND CONTINGENCIES
EQUITY:
Additional paid-in capital	$ 1,349,888	$ 1,334,474
Retained earnings	1,459,742	1,319,639
Accumulated other comprehensive loss	(151,611)	(72,252)
Treasury stock, at cost	(227,791)	(224,547)
Total equity	2,430,897	2,357,980
Total liabilities and equity	6,716,546	5,595,753
Class A Common Stock, $0.01 par value, one vote per share; 180,000,000 shares authorized at September 30, 2015 and December 31, 2014; 66,081,310 and 65,632,309 shares issued and 53,352,916 and 52,938,267 shares outstanding (net of 12,728,394 and 12,694,042 shares in treasury) on September 30, 2015 and December 31, 2014, respectively
EQUITY:
Common Stock	661	656
Class B Common Stock, $0.01 par value, ten votes per share; 30,000,000 shares authorized at September 30, 2015 and December 31, 2014; 794,938 and 1,020,485 shares issued and outstanding on September 30, 2015 and December 31, 2014, respectively
EQUITY:
Common Stock	$ 8	$ 10