Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Jun. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Preferred stock par value	$ 0.01	$ 0.01
Preferred stock authorized	2,000,000	2,000,000
Preferred stock issued	0	0
Common stock par value	$ 0.01	$ 0.01
Common stock authorized	206,000,000	206,000,000
Common stock issued	77,487,933	77,893,144
Common stock outstanding	77,487,933	77,893,144