The Company (Details)	Dec. 31, 2018 Property state
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of consolidated properties \| Property	135
Number of states in which entity has interests \| state	34

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