Income Taxes (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Income Taxes [Abstract]
Recognized tax effect on financial statements, percent			50.00%
Income tax benefit	$ (2,479,000)	$ (355,000)	$ (8,127,000)	$ (739,000)
Unrecognized tax benefits	$ 3,500,000		$ 3,500,000		$ 55,900,000