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Basis of Presentation and Accounting Policies (Details) - USD ($) $ in Thousands | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2020 | Jan. 01, 2020 | Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Retained earnings | $ 3,643,868 |  | $ 3,695,862
Allowance for doubtful accounts | 72,084 |  | 53,412
Increase to allowance for credit loss | 11,800 |  |
Accounts receivable, noncurrent | 110,700 |  | 118,500
Allowance for credit loss, noncurrent | 99,000 |  | $ 101,400
Accounting Standards Update 2016-13 |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Retained earnings |  | $ 7,300 |
Allowance for doubtful accounts | $ 6,900 |  |

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