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v3.21.2

Allowance for Doubtful Accounts - Notes Receivable Disaggregated by Vintage Year (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Current-period gross write-offs |  |  |  |
2021 |  |  | $ 0 |
2020 |  |  | 0 |
2019 |  |  | 0 |
2018 |  |  | 315 |
2017 |  |  | 2,493 |
Prior |  |  | 0 |
Total |  |  | 2,808 |
Current-period recoveries |  |  |  |
2021 |  |  | 0 |
2020 |  |  | 0 |
2019 |  |  | (1) |
2018 |  |  | 0 |
2017 |  |  | 0 |
Prior |  |  | (37) |
Total |  |  | (38) |
Current-period net write-offs |  |  |  |
2021 |  |  | 0 |
2020 |  |  | 0 |
2019 |  |  | (1) |
2018 |  |  | 315 |
2017 |  |  | 2,493 |
Prior |  |  | (37) |
Total | $ 0 | $ 253 | 2,770 | $ 2,421
Standard notes receivable |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
2021 | 11,414 |  | 11,414 |
2020 | 8,181 |  | 8,181 |
2019 | 2,060 |  | 2,060 |
2018 | 18,980 |  | 18,980 |
2017 | 21,289 |  | 21,289 |
Prior | 1,560 |  | 1,560 |
Total | 63,484 |  | 63,484 |
Current-period net write-offs |  |  |  |
Total | 0 | 253 | 9 | 1,974
Elevated risk notes receivable |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
2021 | 0 |  | 0 |
2020 | 0 |  | 0 |
2019 | 617 |  | 617 |
2018 | 0 |  | 0 |
2017 | 723 |  | 723 |
Prior | 1,374 |  | 1,374 |
Total | 2,714 |  | 2,714 |
Current-period net write-offs |  |  |  |
Total | $ 0 | $ 0 | $ 2,761 | $ 447

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