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Detail of Certain Balance Sheet Captions - Other Current Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Interest payable $ 11,669 $ 14,680
Current portion of performance guarantee obligations 2,921 4,067
Current portion of lease liability 1,075 561
Deferred revenue 2,882 2,086
Other 25 410
Total $ 18,572 $ 21,804