Summary of Significant Accounting Policies (Details Textuals 1) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Sep. 30, 2014 acre		Sep. 30, 2014 acre		Sep. 30, 2013		Sep. 30, 2012
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 334.8		$ 334.8		$ 236.7
Area of Land	177,000		177,000
Real Estate Investment Property, at Cost	56.0		56.0
Payments to Acquire Property, Plant, and Equipment	37.4
Property, Plant and Equipment, Net	193.7	[1]	193.7	[1]	109.5	[1]
Accumulated depreciation	(141.1)		(141.1)		(127.2)
Depreciation			36.6		22.3		18.8
Notes Assumed			18.6		0		0
Payments to Acquire Real Estate Held-for-investment	46.5
Acreage, grazing rights assumed under long-term lease	114,000
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	112.8		112.8		92.2
Building and Building Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life			5 years
Building and Building Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life			20 years
2510 Household Furniture [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	86.7		86.7		72.7
Property, Plant and Equipment, Useful Life			2 years
Office furniture [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	68.4		68.4		54.9
Office furniture [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life			2 years
Office furniture [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life			5 years
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	66.9		66.9		16.9
Homebuilding [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Net	190.8		190.8		106.7
Financial Services [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Net	$ 2.9		$ 2.9		$ 2.8

[1] Includes $2.9 million and $2.8 million at September 30, 2014 and 2013, respectively, of property and equipment related to the Company's financial services subsidiaries which is included in financial services other assets in the consolidated balance sheets.