Stockholders' Equity (Authorized, Issued and Outstanding Shares) (Details) - $ / shares	Dec. 31, 2015	Dec. 31, 2014
Stockholders' Equity Note [Abstract]
Preferred stock, Par Value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, Shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, Shares issued (in shares)	0	0
Preferred stock, Shares outstanding (in shares)	0	0
Common stock, Par Value (in dollars per share)	$ 0.01	$ 0.01
Common stock, Shares authorized (in shares)	400,000,000	400,000,000
Common stock, Shares issued (in shares)	289,581,682	295,867,844
Common stock, Shares outstanding (in shares)	289,581,682	295,867,844