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Taxes on Income (Details) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2021 | Mar. 31, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2017 | Dec. 31, 2020
Income Taxes [Abstract] |  |  |  |  |  |  |
Effective income tax rate |  |  |  | 21.00% |  | 35.00% |
Income tax receivable | $ 70,959,000 |  |  | $ 70,959,000 |  |  | $ 188,177,000
Tax refund amount |  | $ 119,493,000 |  |  |  |  |
Loss before taxes on income [Abstract] |  |  |  |  |  |  |
Earnings (loss) before taxes on income | (325,594,000) |  | $ 19,274,000 | (313,760,000) | $ (476,664,000) |  |
U.S. Federal [Abstract] |  |  |  |  |  |  |
Current | (446,000) |  | (33,690,000) | (446,000) | (189,994,000) |  |
Deferred | (55,772,000) |  | 23,350,000 | (52,968,000) | 16,056,000 |  |
U.S. State and local [Abstract] |  |  |  |  |  |  |
Current | 832,000 |  | 1,257,000 | 1,047,000 | 1,875,000 |  |
Deferred | (5,056,000) |  | 620,000 | (3,480,000) | (10,674,000) |  |
Foreign - current | 0 |  | 44,000 | 7,000 | 80,000 |  |
Total provision (benefit) for taxes on income | (60,442,000) |  | (8,419,000) | $ (55,840,000) | (182,657,000) |  |
COVID-19 [Member] |  |  |  |  |  |  |
Income Taxes [Abstract] |  |  |  |  |  |  |
Operating losses tax year |  |  |  | 2013 2014 2015 2016 2017 |  |  |
Tax benefit related to CARES Act |  |  |  | $ 58,746,000 |  |  |
COVID-19 [Member] | Maximum [Member] |  |  |  |  |  |  |
Income Taxes [Abstract] |  |  |  |  |  |  |
Number of years net operating losses carried |  |  |  | 5 years |  |  |
United States [Member] |  |  |  |  |  |  |
Loss before taxes on income [Abstract] |  |  |  |  |  |  |
Earnings (loss) before taxes on income | (325,369,000) |  | 19,246,000 | $ (313,177,000) | (476,382,000) |  |
Foreign [Member] |  |  |  |  |  |  |
Loss before taxes on income [Abstract] |  |  |  |  |  |  |
Earnings (loss) before taxes on income | $ (225,000) |  | $ 28,000 | $ (583,000) | $ (282,000) |  |

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