Stock-Based Compensation And Earnings Per Share (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended	9 Months Ended			3 Months Ended		9 Months Ended		9 Months Ended
	Mar. 31, 2011	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010	Sep. 30, 2011 Minimum [Member]	Sep. 30, 2010 Maximum [Member]	Sep. 30, 2011 Maximum [Member]	May 12, 2009 Maximum [Member]	Sep. 30, 2011 Service-Based Restricted Stock Units [Member] years	Sep. 30, 2011 Market Condition Restricted Stock Units [Member] years
Stock-Based Compensation And Earnings Per Share [Line Items]
Equity Incentive Plan issuance of common stock		180,000,000		180,000,000				2,000,000
Shares remained available for issuance under the 2009 Equity Incentive Plan		1,500,000
Discount at which employee may purchase company's common stock through payroll deduction being recognized as compensation expense		15.00%
Accelerated vesting of restricted stock	300,000
Accelerated stock compensation expense	$ 6.2
Unrecognized compensation cost related to non-vested restricted stock									$ 0.3	$ 0.3
Stock option compensation recognition period (years)									4	3
Anti-dilutive shares excluded from the computation of diluted earning (loss) per share			100,000		0	100,000	100,000