Net Income (Loss) Per Share Schedule of Antidilutive Securities (Details) (Shares subject to outstanding common stock awards)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Shares subject to outstanding common stock awards
       
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]        
Potentially dilutive shares 11,253 6 11,253 15,468