Consolidated Balance Sheets [Parenthetical] (USD $)	Dec. 31, 2013	Dec. 31, 2012
Preferred stock, shares authorized	7,000,000	7,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	150,000,000	150,000,000
Common Stock, Shares, Issued	77,886,031	68,189,314
Common stock, shares outstanding	77,886,031	68,189,314