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Recent Accounting Developments (Details) - USD ($) $ in Thousands | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Jan. 01, 2020 | Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle |  |  |  |
Accumulated deficit | $ (2,384,602) |  |  | $ (2,244,877)
Credit Losses |  |  |  |
Contractual life of accounts receivable | 30 days |  |  |
Period for analyzing historical loss data to determine loss experience | 2 years |  |  |
Changes in the allowance for credit losses balance |  |  |  |
Balance at beginning of period | $ 2,210 |  |  |
Provision for credit losses | 2,235 | $ 979 |  |
Write-offs charged against the allowance | (1,006) |  |  |
Balance at end of period | 3,223 |  |  |
ASU 2016-13 |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle |  |  |  |
Change in Accounting Principle, Accounting Standards Update, Adopted |  |  | true |
ASU 2016-13 | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle |  |  |  |
Accumulated deficit |  |  |  | $ (200)
Changes in the allowance for credit losses balance |  |  |  |
Balance at beginning of period | $ (216) |  |  |
ASU 2018-13 |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle |  |  |  |
Change in Accounting Principle, Accounting Standards Update, Adopted |  |  | true |
ASU 2019-12 |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle |  |  |  |
Change in Accounting Principle, Accounting Standards Update, Adopted |  |  | true |

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