Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Restricted cash (Details)

v3.19.3.a.u2
Restricted cash (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Cash and Cash Equivalents [Abstract]        
Cash and cash equivalents $ 1,121,396 $ 1,204,018    
Restricted cash 178,951 211,017    
Total cash, cash equivalents and restricted cash $ 1,300,347 $ 1,415,035 $ 2,024,125 $ 2,364,627