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Revenue Recognition (Analysis of Product Return Liability) (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Aggregate product return rate | 1.70% | 1.30% |
Return accrual included in accounts payable and accrued liabilities | $ 14,823 |  | $ 10,190
Return accrual included in other long-term liabilities | 4,900 |  | $ 4,000
Product returns |  |  |
Beginning balance | 14,204 | $ 10,339 |
Provision for product returns | 11,714 | 9,084 |
Credits issued to third parties | (6,183) | (6,731) |
Ending balance | $ 19,735 | $ 12,692 |

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- Definition Carrying value as of the balance sheet date of obligations incurred through that date for estimated refunds due to goods returned by customers (other than under warranty provisions). For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References No definition available. + Details
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