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v3.22.2

REVENUE - Deferred revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
REVENUE |  |  |  |  |
Beginning balance | $ 180,333 | $ 158,766 | $ 168,607 | $ 149,224 |
Deferral of unearned revenue | 63,628 | 60,655 | 125,263 | 116,034 |
Recognition of unearned revenue | (50,989) | (46,470) | (100,898) | (92,307) |
Ending balance | 192,972 | $ 172,951 | 192,972 | $ 172,951 |
Long-term unearned revenue | $ 27,700 |  | $ 27,700 |  | $ 18,400
Long-term unearned revenue, recognition period (or less) |  |  | 5 years |  |

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