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Revenue from Contracts with Customers - Schedule of Contract with Customer, Asset and Liability (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Revenue from Contract with Customer [Abstract]    
Contract assets, current $ 187,313 $ 177,830
Contract assets, non-current 0 0
Contract liabilities, current (714,686) (623,642)
Contract liabilities, non-current (2,161) (2,142)
Net contract liabilities $ (529,534) $ (447,954)