Unaudited Condensed Consolidated Balance Sheets Parenthetical - $ / shares	Jun. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Common stock, par or stated value per share	$ 0.01	$ 0.01
Common stock, shares authorized	207,060,000	207,060,000
Common stock, shares, issued	195,749,034	195,743,154
Common stock, shares, outstanding	195,749,034	195,743,154