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Revenues - Contract Assets and Liabilities From Contracts with Customers (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Contract liabilities | $ 1,016,327 | $ 911,395
Contract liabilities | 600,496 | 148,591
Accounts receivable, net |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Contract assets | 45,316 | 43,541
Prepaid expenses and other current assets |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Contract assets | 12,589 | 5,495
Other assets |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Noncurrent other assets | 40,112 | 19,927
Other current liabilities |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Contract liabilities | 5,706 | 8,530
Other liabilities |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Contract liabilities | 31,867 | 24,614
Accrued expenses |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Contract liabilities | $ 0 | $ 5,265

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