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Revenue - Summary of Total Receivables, Net (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
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Revenue from Contract with Customer [Abstract] |  |  |  |
Billed receivables | $ 162,479 | $ 179,177 |  |
Allowance for doubtful accounts | (2,861) | (3,912) | $ (5,149) | $ (3,912)
Billed receivables, net | 159,618 | 175,265 |  |
Current accrued receivables, net | 160,787 | 167,614 |  |
Long-term accrued receivables, net | 276,164 | 215,772 |  |
Total accrued receivables, net | 436,951 | 383,386 |  |
Total receivables, net | $ 596,569 | $ 558,651 |  |

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