Earnings (Loss) Per Common Share (Schedule Of Numerators And Denominators Of Basic And Diluted EPS Computations For Operations) (Details) (USD $) In Thousands, except 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
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Loss from operations, Basic and Diluted EPS, Income (Numerator)									$ (102,027)	$ (73,109)	$ (90,853)
Loss from operations, Basic and Diluted EPS, Shares (Denominator)									70,117,000	67,435,000	59,997,000
Loss from operations, Basic and Diluted EPS, Per Share Amounts	$ (0.44)	$ (0.39)	$ (0.43)	$ (0.19)	$ (0.01)	$ (0.89)	$ (0.07)	$ (0.13)	$ (1.46)	$ (1.08)	$ (1.51)
Anti-dilutive securities excluded from the computation of diluted earnings (loss) per share									1,100,000	2,700,000	3,200,000
4.75% Convertible Senior Notes Due On 2018 [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from the computation of diluted earnings (loss) per share									19,900,000