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

Accounts payable, accrued expenses and other liabilities (Details)

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Accounts payable, accrued expenses and other liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Payables and Accruals [Abstract]    
Accounts payable and accrued expenses $ 307,391 $ 330,437
Deferred revenue 452,846 463,090
Accrued interest 254,865 287,205
Guarantees (Note 29) 2,272 51,804
Accounts payable, accrued expenses and other liabilities $ 1,017,374 $ 1,132,536