Earnings/(Loss) Per Share (Computation Of Basic And Diluted Earnings Per Share) (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended			12 Months Ended	3 Months Ended					12 Months Ended
	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2009	Dec. 31, 2011 Restated [Member]	Sep. 30, 2011 Restated [Member]	Jun. 30, 2011 Restated [Member]	Mar. 31, 2011 Restated [Member]	Dec. 31, 2010 Restated [Member]	Dec. 31, 2011 Restated [Member]	Dec. 31, 2010 Restated [Member]
Earnings Per Share [Line Items]
Net income / (loss) from continuing operations, net of noncontrolling interests in subsidiaries				$ 72,677						$ (1,323,384)	$ (129,668)
Income / (loss) on discontinued operations	31,017	(7,922)	(34,873)	8,360	0	0	0	0	3,373	0	(8,405)
Net income / (loss)	$ 99,896	$ (77,996)	$ (23,364)	$ 81,037	$ (469,282)	$ (848,735)	$ (3,333)	$ (2,034)	$ (136,609)	$ (1,323,384)	$ (138,073)
Weighted average shares of common stock outstanding (used to calculate basic EPS)				53,772						72,172	70,058
Net effect of dilutive employee stock options based on the treasury stock method				208						136	270
Weighted average shares of common stock outstanding (used to calculate diluted EPS)				53,980						72,308	70,328
Continuing operations				$ 1.35						$ (18.34)	$ (1.85)
Discontinued operations				$ 0.16						$ 0.00	$ (0.12)
Earnings per share basic	$ 1.42	$ (1.11)	$ (0.34)	$ 1.51	$ (6.47)	$ (11.71)	$ (0.05)	$ (0.03)	$ (1.94)	$ (18.34)	$ (1.97)
Continuing operations				$ 1.35						$ (18.34)	$ (1.85)
Discontinued operations				$ 0.15						$ 0.00	$ (0.12)
Earnings per share diluted	$ 1.41	$ (1.11)	$ (0.34)	$ 1.50	$ (6.47)	$ (11.71)	$ (0.05)	$ (0.03)	$ (1.94)	$ (18.34)	$ (1.97)