Equity Investments in Real Estate - Summarized Investee Income Statement (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Equity Method Investment, Summarized Financial Information, Income Statement      
Revenues $ 815,161 $ 779,875 $ 595,228
Expenses 865,706 791,224 546,170
(Loss) income from continuing operations $ (50,545) $ (11,349) $ 49,058