Stock-Based Compensation And Earnings Per Share (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended	6 Months Ended			3 Months Ended		6 Months Ended			6 Months Ended
	Mar. 31, 2011	Jun. 30, 2010	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2011 Maximum [Member]	Jun. 30, 2010 Maximum [Member]	Jun. 30, 2011 Maximum [Member]	Jun. 30, 2010 Maximum [Member]	May 12, 2009 Maximum [Member]	Jun. 30, 2011 Service-Based Non-Vested Restricted Stock [Member] years	Jun. 30, 2011 Market Condition Non-Vested Restricted Stock [Member] years
Equity Incentive Plan issuance of common stock			180,000,000	180,000,000					2,000,000
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										$ 0.2	$ 0.2
Stock option compensation recognition period (years)										4	3
Anti-dilutive shares excluded from the computation of diluted earning (loss) per share					100,000	100,000	100,000	100,000