Earnings Per Share (Reconciliation Of The Numerators And Denominators Of The Basic And Diluted Earnings Per Share) (Details) (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Earnings Per Share [Abstract]
Basic income (loss) from operations per share, Income from Operations (Numerator)	$ 762	$ (134)	$ (21,698)	$ 23,006
Basic income (loss) from operations per share, Shares (Denominator)	69,215	68,526	69,013	68,179
Basic income (loss) from operations Per-Share Amount	$ 0.01	$ 0.00	$ (0.31)	$ 0.34
Effect of dilutive securities, Income from Operations (Numerator)	0	0	0	0
Effect of dilutive securities, Shares (Denominator)	145	0	0	677
Diluted income (loss) from operations per share, Income from Operations (Numerator)	$ 762	$ (134)	$ (21,698)	$ 23,006
Diluted income (loss) from operations per share, Shares (Denominator)	69,360	68,526	69,013	68,856
Diluted income (loss) from operations Per-Share Amount	$ 0.01	$ 0.00	$ (0.31)	$ 0.33