Condensed Consolidated Statements Of Operations (Parenthetical) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Condensed Consolidated Statements Of Operations
General and administrative, non-cash stock-based compensation	$ 0.80	$ 1.10	$ 1.01	$ 1.00