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Basis of Presentation and Accounting Policies (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2020 | Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Accounting Standards Update |  | us-gaap:AccountingStandardsUpdate201613Member
Retained earnings | $ 3,625,291 | $ 3,652,244
Allowance for doubtful accounts | 76,061 | 53,412
Increase to allowance for credit loss | 15,800 |
Accounts receivable, noncurrent | 108,200 | 118,500
Allowance for credit loss, noncurrent | 97,900 | 101,400
ASU No. 2016-13 - Measurement of Credit Losses on Financial Instruments (Topic 326) |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Retained earnings |  | $ 7,300
Allowance for doubtful accounts | $ 6,900 |

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