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Prepaid Expenses and Other Assets, net (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Investment in unconsolidated entities $ 14,093 $ 37,228
Goodwill 8,754 8,754
Derivative assets 6,250 5,935
Other 28,263 27,141
Prepaid expenses and other assets, net $ 57,360 $ 79,058