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Consolidated Balance Sheets (Parenthetical) (USD $)
Sep. 30, 2014
Sep. 30, 2013
Statement of Financial Position [Abstract]    
Common stock, authorized shares 300,000,000 300,000,000
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, issued shares 96,715,797 96,016,358
Common stock, outstanding shares 96,715,797 96,016,358