Organization (Details)	Dec. 31, 2015 state property
Organization
Number of properties owned \| property	427
Number of states in which properties are located \| state	43

The number of states the entity operates in as of the balance sheet date.

No definition available.

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