Revenue - Schedule of Contract Liabilities (Details) - USD ($) $ in Thousands |
9 Months Ended | 12 Months Ended |
|---|---|---|
Sep. 30, 2021 |
Dec. 31, 2020 |
|
| Contract with Customer, Liability [Roll Forward] | ||
| Balance, beginning of period | $ 8,281 | $ 7,244 |
| Deduction for recognition of revenue | (5,308) | (25,047) |
| Increase for deferral of shortfall payments | 4,338 | 25,436 |
| Increase for deferral of customer prepayments | 187 | 648 |
| Balance, end of period | $ 7,498 | $ 8,281 |
| X | ||||||||||
- Definition Contract with Customer, Liability, Deduction For Revenue Recognized No definition available.
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| X | ||||||||||
- Definition Contract with Customer, Liability, Period Increase From Deferred Customer Payments No definition available.
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| X | ||||||||||
- Definition Contract with Customer, Liability, Period Increase From Deferred Shortfall Payments No definition available.
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| X | ||||||||||
- Definition Contract with Customer, Liability No definition available.
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| X | ||||||||||
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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