Share-Based Employee Compensation Plans and Other Compensation and Benefit Plans (Restricted Stock Narrative) (Details) (Restricted Stock [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2011
Remaining unrecognized compensation expense	$ 2.5
Weighted-average period for cost recognition, years	1.9
Shares withheld to cover employees' taxes upon vesting	11.3
Employee Stock [Member]
Restricted stock plan description	The Company's performance incentive plan provides for the award of shares of restricted stock to its corporate and senior management that vest evenly over a three-year period and are held in escrow until such vesting has occurred. Generally, unvested shares are forfeited when an employee ceases employment. The fair value of shares awarded under this plan is based on the closing market price of the Company's common stock on the date of award and compensation expense is recorded evenly over the vesting period.
Director [Member]
Restricted stock plan description	The Company's director stock plan provides for the award of shares of restricted stock that vest evenly over a three-year period and are held in escrow until such vesting has occurred. Generally, unvested shares are forfeited when a director ceases their service on the Company's Board of Directors. The fair value of shares awarded under this plan is based on the closing market price of the Company's common stock on the date of award and compensation expense is recorded evenly over the vesting period.

Remaining unrecognized compensation expense

$ 2.5

Shares withheld to cover employees' taxes upon vesting

11.3

The Company's performance incentive plan provides for the award of shares of restricted stock to its corporate and senior management that vest evenly over a three-year period and are held in escrow until such vesting has occurred. Generally, unvested shares are forfeited when an employee ceases employment. The fair value of shares awarded under this plan is based on the closing market price of the Company's common stock on the date of award and compensation expense is recorded evenly over the vesting period.

Restricted stock plan description

The Company's director stock plan provides for the award of shares of restricted stock that vest evenly over a three-year period and are held in escrow until such vesting has occurred. Generally, unvested shares are forfeited when a director ceases their service on the Company's Board of Directors. The fair value of shares awarded under this plan is based on the closing market price of the Company's common stock on the date of award and compensation expense is recorded evenly over the vesting period.