Unaudited Condensed Consolidated Statement of Operations Statement (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues	$ 597,372	$ 576,774	$ 1,199,878	$ 1,156,473
Costs and expenses	(469,183)	(461,751)	(944,122)	(915,004)
Gross profits	128,189	115,023	255,756	241,469
General and administrative expenses	(29,558)	(24,685)	(55,517)	(53,518)
Losses (gains) on divestitures and impairment charges, net	1,058	(9,843)	568	(10,263)
Operating income	99,689	80,495	200,807	177,688
Interest expense	(33,894)	(33,879)	(67,482)	(67,438)
Loss on early extinguishment of debt, net	0	(1,835)	0	(2,149)
Other (expense) income, net	(2,221)	46	1,684	720
Income before income taxes	63,574	44,827	135,009	108,821
Provision for income taxes	(25,935)	(18,089)	(49,055)	(42,154)
Net income	37,639	26,738	85,954	66,667
Net income attributable to noncontrolling interests	(563)	(645)	(853)	(1,810)
Net income attributable to common stockholders	$ 37,076	$ 26,093	$ 85,101	$ 64,857
Basic earnings per share:
Net income attributable to common stockholders, basic	$ 0.17	$ 0.11	$ 0	$ 0.27
Basic weighted average number of shares	215,898	238,498	218,015	239,131
Diluted earnings per share:
Net income attributable to common stockholders, diluted	$ 0.17	$ 0.11	$ 0	$ 0.27
Diluted weighted average number of shares	218,906	241,435	221,058	241,589
Dividends declared per share	$ 0	$ 0.05	$ 0	$ 0.1