Earnings (Losses) Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net income (loss) (numerator):
Income (loss) from continuing operations, net of tax	$ (90,510)	$ 64,489	$ 29,825	$ 100,616
Less: Net (income) loss attributable to noncontrolling interest	(441)	(988)	(6,154)	453
Less: (earnings) losses allocated to unvested shareholders	1,411		671
Adjusted income (loss) from continuing operations - basic and diluted	(89,540)	63,501	24,342	101,069
Income (loss) from discontinued operations, net of tax	$ (14,430)	$ 12,155	$ (34,292)	$ 35,888
Earnings (losses) per share:
Basic from continuing operations (in dollars per share)	$ (0.30)	$ 0.22	$ 0.08	$ 0.35
Basic from discontinued operations (in dollars per share)	$ (0.05)	$ 0.04	$ (0.11)	$ 0.12
Total Basic (in dollars per share)	$ (0.35)	$ 0.26	$ (0.03)	$ 0.47
Diluted from continuing operations (in dollars per share)	$ (0.30)	$ 0.22	$ 0.08	$ 0.35
Diluted from discontinued operations (in dollars per share)	$ (0.05)	$ 0.04	$ (0.11)	$ 0.12
Total Diluted (in dollars per share)	$ (0.35)	$ 0.26	$ (0.03)	$ 0.47
Shares (denominator):
Weighted-average number of shares outstanding - basic	295,076,000	290,367,000	293,837,000	289,822,000
Net effect of dilutive stock options, warrants and restricted stock awards based on the if-converted method (in shares)		2,134,000	2,371,000	2,468,000
Weighted-average number of shares outstanding - diluted	295,076,000	292,501,000	296,208,000	292,290,000
Average number of options and warrants excluded from diluted earnings (losses) per share (in shares)	18,786,837	15,010,906	11,887,169	13,934,259