Commitments to Acquire/Dispose of Real Estate (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014
Commitments to Acquire Real Estate
Properties Acquired-Total	0
Rental Units Acquired - Total	0
Purchase Price - Total	$ 16,300
Commitments to Dispose of Real Estate
Properties Disposed - Total	4
Rental Units Disposed-Total	1,360
Sales Price For Commitments To Dispose	224,150
Land Parcel [Member]
Commitments to Acquire Real Estate
Purchase Price - Total	16,300
Land Parcels Contracted to be Acquired	1
Rental Properties Disposed of [Member]
Commitments to Dispose of Real Estate
Properties Disposed - Total	4
Rental Units Disposed-Total	1,360
Sales Price For Commitments To Dispose	192,050
Land Parcel [Member]
Commitments to Dispose of Real Estate
Sales Price For Commitments To Dispose	$ 32,100