Earnings Per Common Share (Details) (USD $)	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Earnings Per Share Reconciliation Details [Abstract]
Net loss attributable to common shares	$ (151,471,000)	$ (23,150,000)	$ (198,087,000)	$ (114,279,000)
Net loss per share attributable to common shares - Basic	$ (0.49)	$ (0.11)	$ (0.70)	$ (0.54)
Net loss per share attributable to common shares - Diluted	$ (0.49)	$ (0.11)	$ (0.70)	$ (0.54)

The amount of net income or loss for the period per each share of common stock and dilutive common stock equivalents outstanding during the reporting period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 11, 12, 36

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 20
-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 18
-Article 7

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 21
-Article 9

Name:	us-gaap_EarningsPerShareDiluted
Namespace Prefix:	us-gaap
Data Type:	us-types:perShareItemType
Balance Type:	na
Period Type:	duration