Subsequent Events (Details) (Milstead Village [Member], Acquisition [Member])	Feb. 01, 2013 Apartments
Milstead Village [Member] \| Acquisition [Member]
Subsequent Event [Line Items]
Number of units in real estate property	310

The number of units in a real estate property owned as of the balance sheet date.

No definition available.

Name:	us-gaap_NumberOfUnitsInRealEstateProperty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant