Unaudited Condensed Consolidated Statement of Operations Statement (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenues	$ 747,123	$ 652,352
Costs and expenses	(580,741)	(492,695)
Gross profits	166,382	159,657
General and administrative expenses	(56,010)	(30,923)
Losses on divestitures and impairment charges, net	(2,812)	(969)
Operating income	107,560	127,765
Interest expense	(44,996)	(32,769)
Other income (expense), net	1,534	(984)
Income before income taxes	64,098	94,012
Provision for income taxes	(22,707)	(35,290)
Net income	41,391	58,722
Net income attributable to noncontrolling interests	(289)	(1,102)
Net income attributable to common stockholders	$ 41,102	$ 57,620
Basic earnings per share:
Net income attributable to common stockholders	$ 0.19	$ 0.27
Basic weighted average number of shares	212,838	211,380
Diluted earnings per share:
Net income attributable to common stockholders	$ 0.19	$ 0.27
Diluted weighted average number of shares	217,231	215,208
Dividends declared per share	$ 0.08	$ 0.06