Earnings (Losses) Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net income (loss) (numerator):
Income (loss) from continuing operations, net of tax	$ 29,259	$ (98,653)	$ 126,431	$ 43,965
Less: Net (income) loss attributable to noncontrolling interest	(5,616)	1,174	(5,713)	1,441
Less: earnings allocated to unvested shareholders	74		(740)
Adjusted income (loss) from continuing operations - basic and diluted	23,717	(97,479)	119,978	45,406
Income (loss) from discontinued operations, net of tax	$ (28,004)	$ 24,690	$ (25,958)	$ 15,895
Earnings (losses) per share:
Basic from continuing operations (in dollars per share)	$ 0.08	$ (0.34)	$ 0.41	$ 0.16
Basic from discontinued operations (in dollars per share)	$ (0.09)	$ 0.09	$ (0.09)	$ 0.05
Total Basic (in dollars per share)	$ (0.01)	$ (0.25)	$ 0.32	$ 0.21
Diluted from continuing operations (in dollars per share)	$ 0.08	$ (0.34)	$ 0.41	$ 0.16
Diluted from discontinued operations (in dollars per share)	$ (0.09)	$ 0.09	$ (0.09)	$ 0.05
Total Diluted (in dollars per share)	$ (0.01)	$ (0.25)	$ 0.32	$ 0.21
Shares (denominator):
Weighted-average number of shares outstanding - basic	294,747,000	290,311,000	293,217,000	289,550,000
Net effect of dilutive stock options, warrants and restricted stock awards based on the if-converted method (in shares)	2,372,000		2,427,000	2,635,000
Weighted-average number of shares outstanding - diluted	297,119,000	290,311,000	295,644,000	292,185,000
Average number of options and warrants excluded from diluted earnings (losses) per share (in shares)	11,578,175	17,635,173	12,015,219	13,395,935

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Antidilution

-URI http://asc.fasb.org/extlink&oid=6505113

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Diluted Earnings Per Share

-URI http://asc.fasb.org/extlink&oid=6510752

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Contingent Stock Agreement

-URI http://asc.fasb.org/extlink&oid=6508534

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 40

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 13, 14

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 07-4

-Paragraph 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 171

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.