XML 83 R70.htm IDEA: XBRL DOCUMENT v3.10.0.1
Variable Interest Entities (Narrative) (Details)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2018
USD ($)
property
joint_venture
Sep. 30, 2017
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
property
joint_venture
Variable Interest Entity [Line Items]        
Number of VIE real estate joint ventures guaranteed by company 1     1
Consolidated Variable Interest Entities [Member]        
Variable Interest Entity [Line Items]        
Number of VIE real estate joint ventures 9     9
Number of real estate properties | property 21     22
Variable Interest Entity, Financial or Other Support, Amount | $ $ 0.1 $ 0.1    
Unconsolidated Variable Interest Entities [Member]        
Variable Interest Entity [Line Items]        
Number of VIE real estate joint ventures 2     2
Number of joint venture arrangements 1      
Variable interest entity, nonconsolidated, additional future funding | $ $ 69.0      
Scenario, Forecast [Member] | Consolidated Variable Interest Entities [Member]        
Variable Interest Entity [Line Items]        
Variable Interest Entity, Financial or Other Support, Amount | $     $ 0.0