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Related Party Transactions (Details Textuals) - USD ($)
9 Months Ended 12 Months Ended
May. 20, 2014
Jun. 19, 2014
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2012
Madison Park, LLC [Member]          
Related Party Transaction [Line Items]          
Period of advisory services agreements     1 year 1 year 1 year
Expenses from transactions with related party   $ 5,200,000 $ 7,200,000 $ 7,200,000 $ 6,000,000
Due to Related Parties     $ 0 $ 0  
Period for termination notice 30 days        
LPG Limited (HK) [Member]          
Related Party Transaction [Line Items]          
Period of advisory services agreements     1 year 1 year  
Expenses from transactions with related party     $ 259,000 $ 480,000