XML 100 R84.htm IDEA: XBRL DOCUMENT v3.8.0.1
Acquisitions - Gain (Loss) on Remeasurement (Details) - USD ($)
$ in Thousands
12 Months Ended
Feb. 17, 2015
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Nov. 14, 2014
Acquisition          
Carrying value of investment   $ (1,709,522) $ (1,773,558)    
Gain on remeasurement of assets   $ 0 $ 0 $ 22,089  
Inland Center          
Acquisition          
Fair value of existing ownership interest $ 26,250        
Carrying value of investment (4,161)        
Gain on remeasurement of assets $ 22,089        
Fair value of existing ownership interest (as a percent)         50.00%