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Cash, Cash Equivalents and Restricted Cash (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Jun. 30, 2019
Dec. 31, 2018
Cash and Cash Equivalents [Abstract]        
Cash and cash equivalents $ 32,010 $ 37,575 $ 119,176 $ 30,284
Restricted cash 129,235 126,544 165,734 144,930
Total cash, cash equivalents and restricted cash $ 161,245 $ 164,119 $ 284,910 $ 175,214