Real Estate Acquisitions Real Estate Acquisitions, Schedule of Disposed Properties (Details)	Dec. 31, 2016 sites
Business Combinations [Abstract]
Number of Units in Real Estate Property	1,677

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