Consolidated Balance Sheets (Parenthetical) - $ / shares shares in Thousands	Jun. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Preferred stock, par value per share	$ 0.001	$ 0.001
Preferred stock, shares authorized	5,000	5,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value per share	$ 0.001	$ 0.001
Common stock, shares authorized	97,500	97,500
Common stock, shares issued	33,891	34,433
Common stock, shares outstanding	33,891	34,433