Stock-Based Compensation And Earnings Per Share (Narrative) (Details) (USD $)	1 Months Ended	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Incentive Plan issuance of common stock	180,000,000	180,000,000		180,000,000
Shares available for future issuance	1,500,000	1,500,000
Issuances of common stock, shares		36,023
Stock-based compensation expenses		$ 491,000	$ 8,472,000
Issuances of common stock		576,000
Discount at which employees may purchase Company's common stock through payroll deductions being recognized as compensation expense		15.00%
Accelerated Vesting Of Restricted Shares	300,000
Accelerated stock compensation expense	6,200,000
Unrecognized compensation cost related to non-vested restricted stock	100,000	100,000
2009 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share authorized	2,000,000	2,000,000
Service-Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option compensation recognized period (in years)		4.0
Market Condition Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expenses		$ 600,000
Performance period (in years)		3