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Accounts Receivable from Customers (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020
Accounts Receivable [Line Items] |  |
Accounts receivable from contracts with customers | $ 199,631 | $ 162,455
Accrued Income Receivable [Member] |  |
Accounts Receivable [Line Items] |  |
Accounts receivable from contracts with customers | $ 152,100 | $ 108,900
Minimum [Member] |  |
Accounts Receivable [Line Items] |  |
Revenue receipt, days after sale | 30 |
Maximum [Member] |  |
Accounts Receivable [Line Items] |  |
Revenue receipt, days after sale | 90 |

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