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Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2021
Accounting Policies [Abstract] |
Schedule of Cash and Cash Equivalents | The following table provides a reconciliation of cash, cash equivalents and restricted cash to the balances shown in the unaudited condensed consolidated statements of cash flows:
(In thousands) | September 30, 2021 |  | December 31, 2020 |  | September 30, 2020
Cash and cash equivalents | $ | 1,253,706 |  |  | $ | 1,517,361 |  |  | $ | 865,609 |
Restricted cash | 12,696 |  |  | 11,154 |  |  | 8,926 |
Total cash, cash equivalents and restricted cash | $ | 1,266,402 |  |  | $ | 1,528,515 |  |  | $ | 874,535 |
Schedule of Accounts Receivable and Prepaid Expense and Other Current Assets Allowance for Doubtful Accounts | The following table illustrates the activity in the Company's allowance for doubtful accounts:
(In thousands) | Balance as of December 31, 2020 | Increases (decreases) to Costs and Expenses | Write-Offs Net of Recoveries | Balance as of September 30, 2021
Allowance for doubtful accounts - within accounts receivable, net | $ | 20,350 |  | $ | (4,149) |  | $ | (2,100) |  | $ | 14,101 |
Allowance for doubtful accounts - within prepaid expenses and other current assets | $ | 7,029 |  | $ | — |  | $ | — |  | $ | 7,029 |
Schedule of Customer Refund Liability and Inventory Associated with the Reserves | The following table presents the customer refund liability, as well as the associated value of inventory for the periods indicated:
(In thousands) | Balance as of September 30, 2021 |  | Balance as of December 31, 2020 |  | Balance as of September 30, 2020
Customer refund liability | $ | 174,274 |  |  | $ | 203,399 |  |  | $ | 197,496 |
Inventory associated with the reserves | $ | 50,544 |  |  | $ | 57,867 |  |  | $ | 50,779 |

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