Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Sep. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	225,000,000	225,000,000
Common stock, shares issued	141,217,276	130,213,224
Common stock, shares outstanding	139,994,430	128,990,378
Treasury stock, at cost (in shares)	1,222,846	1,222,846