Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Preferred stock, shares authorized (in shares)	2,500,000.0	2,500,000.0
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, shares authorized (in shares)	100,000,000.0	100,000,000.0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares outstanding (in shares)	36,300,000	38,200,000