Shareholders' Equity (Stock) (Narrative) (Details) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Shareholders' Equity
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, shares authorized	245,000,000	245,000,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares issued	127,179,792	141,025,544
Common stock, shares outstanding	127,179,792	141,025,544