Earnings/(Loss) Per Share (Computation Of Basic And Diluted Earnings Per Share) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Earnings/(Loss) Per Share [Abstract]
Net income / (loss) from continuing operations, net of noncontrolling interests in subsidiaries									$ (1,291,816)	$ (92,889)	$ 72,677
Income / (loss) on discontinued operations	0	0	0	0	0	31,017	(7,922)	(34,873)	0	(11,778)	8,360
Net income / (loss)	$ (456,101)	$ (839,850)	$ 3,014	$ 1,121	$ (103,203)	$ 99,896	$ (77,996)	$ (23,364)	$ (1,291,816)	$ (104,667)	$ 81,037
Weighted average shares of common stock outstanding (used to calculate basic EPS)									72,172	70,058	53,772
Net effect of dilutive employee stock options based on the treasury stock method									44	216	208
Weighted average shares of common stock outstanding (used to calculate diluted EPS)									72,216	70,274	53,980
Continuing operations, basic									$ (17.90)	$ (1.32)	$ 1.35
Discontinued operations, basic									$ 0.00	$ (0.17)	$ 0.16
Net income / (loss) from operations per share of common stock, basic	$ (6.29)	$ (11.59)	$ 0.04	$ 0.02	$ (1.46)	$ 1.42	$ (1.11)	$ (0.34)	$ (17.90)	$ (1.49)	$ 1.51
Continuing operations, diluted									$ (17.90)	$ (1.32)	$ 1.35
Discontinued operations, diluted									$ 0.00	$ (0.17)	$ 0.15
Net income / (loss) from operations per share of common stock, diluted	$ (6.29)	$ (11.59)	$ 0.04	$ 0.02	$ (1.46)	$ 1.41	$ (1.11)	$ (0.34)	$ (17.90)	$ (1.49)	$ 1.50