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Consolidated Balance Sheets (Parenthetical) - $ / shares
Mar. 31, 2017
Sep. 30, 2016
Consolidated Balance Sheets    
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 155,529,396 153,901,500
Common stock, outstanding shares 155,529,396 153,901,500