Commitments to Acquire/Dispose of Real Estate (Details) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2014
Commitments to Acquire Real Estate
Properties Acquired-Total	1
Rental Units Acquired - Total	161
Purchase Price - Total	$ 64,300
Commitments to Dispose of Real Estate
Properties Disposed - Total	3
Rental Units Disposed-Total	529
Sales Price For Commitments To Dispose	156,500
Rental Properties Disposed of [Member]
Commitments to Dispose of Real Estate
Properties Disposed - Total	3
Rental Units Disposed-Total	529
Sales Price For Commitments To Dispose	124,400
Land [Member]
Commitments to Acquire Real Estate
Land Parcels Contracted To Be Acquired	1
Commitments to Dispose of Real Estate
Sales Price For Commitments To Dispose	32,100
Land Parcels Contracted To Be Disposed	1
Consolidated Rental Properties [Member]
Commitments to Acquire Real Estate
Properties Acquired-Total	1
Rental Units Acquired - Total	161
Purchase Price - Total	61,000
Land [Member]
Commitments to Acquire Real Estate
Purchase Price - Total	$ 3,300