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Commitments and Contingencies Balances Outstanding under Proprietary Loan Program (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		94 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Sep. 30, 2015	Sep. 30, 2014
Activity Related to Balances Outstanding under our Proprietary Loan Program [Abstract]
Amounts Outstanding Under Our Proprietary Loan Program	$ 75,487	$ 74,665	$ 75,487	$ 74,665	$ 75,487	$ 74,664	$ 70,759
Loans extended			10,056	11,244
Interest accrued			1,863	1,421
Amounts collected and recognized	$ (1,837)	$ (1,454)	(3,372)	(2,511)	$ (17,291)
Amounts written off			$ (7,724)	$ (6,248)