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v3.21.1

Summary of Significant Accounting Policies - Additional Disclosures (Details) $ in Thousands | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2021 USD ($) activity segment | Dec. 31, 2020 USD ($) | Mar. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Number of business activities | activity | 1 |  |  |
Number of operating segments | segment | 1 |  |  |
Adjustment to retained earnings | $ (650,471) | $ (637,788) | $ (488,117) | $ (485,613)
Accounts receivable, net | 126,415 | 114,608 |  |
Allowance for credit losses | 2,137 | 2,198 |  |
Cumulative Effect, Period of Adoption, Adjustment |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Adjustment to retained earnings |  |  |  | 1,198
Retained Earnings (Accumulated Deficit) |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Adjustment to retained earnings | $ (52,458) | $ (40,622) | $ (57,749) | (57,522)
Retained Earnings (Accumulated Deficit) | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Adjustment to retained earnings |  |  |  | $ 1,198

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