Summary Of Significant Accounting Policies (Basic And Diluted Earnings Per Share) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Summary Of Significant Accounting Policies [Abstract]
Net (loss) income	$ (98,390)	$ (64,770)	$ 24,679
Less: distributed and undistributed earnings allocated to participating securities	(711)	(523)	(393)
Net (loss) income attributable to common stockholders	$ (99,101)	$ (65,293)	$ 24,286
Basic weighted-average shares outstanding	46,796	46,628	46,537
Unvested restricted stock and stock options, net			382
Dilutive weighted-average shares outstanding	46,796	46,628	46,919
Basic (Loss) Earnings Per Common Share	$ (2.12)	$ (1.40)	$ 0.52
Dilutive (Loss) Earnings Per Common Share	$ (2.12)	$ (1.40)	$ 0.52