Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	120,000,000	80,000,000
Common stock, shares issued	85,567,021	73,373,744
Common stock, shares outstanding	85,564,435	73,342,777