Commitments to Acquire/Dispose of Real Estate (Details) - Subsequent Event [Member] $ in Thousands	Feb. 17, 2017 USD ($) property
Properties Contracted To Be Disposed | property	2
Units Contracted To Be Disposed	592
Sales Price For Commitments To Dispose	$ 134,850
Rental Properties Disposed of [Member]
Properties Contracted To Be Disposed | property	2
Units Contracted To Be Disposed	592
Sales Price For Commitments To Dispose	$ 98,700
Land [Member]
Sales Price For Commitments To Dispose	$ 36,150
Land Parcels Contracted To Be Disposed	2