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Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands		1 Months Ended	8 Months Ended	12 Months Ended
	Jun. 04, 2015	May 31, 2015	Jun. 05, 2015	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Property, Plant and Equipment [Line Items]
Non-cash distributions			$ 60,143
Realized gain on available for sale securities		$ 15
Unrealized loss on available for sale securities					$ 54	$ 37
Depreciation expense				$ 1,105	1,155	1,452
Depreciation expense related to capitalized software				598	962	994
Total equity			$ 4,082	246,391	213,652	230,244	$ 109,512
Foreign Currency Translation Adjustments
Property, Plant and Equipment [Line Items]
Total equity				$ 208	$ 189	$ (205)	$ (80)
Managed REITs
Property, Plant and Equipment [Line Items]
Non-cash distributions	$ 24,255
RIF
Property, Plant and Equipment [Line Items]
Non-cash distributions	651
AIC
Property, Plant and Equipment [Line Items]
Non-cash distributions	6,931
ABP Trust
Property, Plant and Equipment [Line Items]
Non-cash distributions	$ 31,837
Furniture and equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful life (in years)				3 years
Furniture and equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful life (in years)				10 years
Software development | Minimum
Property, Plant and Equipment [Line Items]
Useful life (in years)				3 years
Software development | Maximum
Property, Plant and Equipment [Line Items]
Useful life (in years)				5 years
EQC
Property, Plant and Equipment [Line Items]
Shares from related party (in shares)					0	90,135
Value of shares received from related party					$ 0	$ 2,354
Market value of shares received from related party						$ 2,317

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