Share-Based Employee Compensation Plans and Other Compensation and Benefit Plans (Restricted Stock) (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Director [Member]
Restricted stock awards 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.
Employee Stock [Member]
Restricted stock awards 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.
Restricted Stock [Member]
Remaining unrecognized compensation expense	2.7
Weighted-average period for cost recognition, years	2 years 1 month 6 days
Shares withheld to cover employees' taxes upon vesting	13,000