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Net Income per Share - Narrative (Details)
Jun. 30, 2014
Sep. 30, 2013
Sep. 29, 2013
Jun. 30, 2013
Earnings Per Share [Abstract]        
Number of shares issued or committed for issuance under outstanding stock options 9,425,725     7,313,250
Number of shares of restricted stock and shares reserved for restricted stock units outstanding 1,211,462     989,354
Preferred stock shares outstanding     27,000  
Number of common stock issuable upon conversion of remaining cumulative convertible preferred stock   6,065,075