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Investments (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Sep. 30, 2015
Schedule of Equity Method Investments [Line Items]          
Investments $ 2,960   $ 2,960   $ 2,733
Equity income (loss) $ (444) $ 0 $ 227 $ 0  
Kingstone Holding Company          
Schedule of Equity Method Investments [Line Items]          
Equity method investment, ownership percentage 15.00%   15.00%   15.00%
Investments $ 3,000   $ 3,000   $ 2,700
Equity income (loss) $ (400)   $ 200