Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Cash and Restricted Cash (Details)

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Summary of Significant Accounting Policies - Cash and Restricted Cash (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Accounting Policies [Abstract]        
Cash $ 269,577 $ 226,625 $ 202,525  
Restricted cash, current and long-term 93,652 77,774 39,265  
Total Cash and Restricted Cash $ 363,229 $ 304,399 $ 241,790 $ 224,363