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Organization and Significant Accounting Policies, Call Spread (Details) | Dec. 31, 2021 | Apr. 30, 2021 | Dec. 31, 2020 | Dec. 31, 2019
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0 Percent Convertible Senior Notes [Member] |  |  |  |
Call Spread [Abstract] |  |  |  |
Interest rate on convertible senior notes | 0.00% | 0.00% |  | 0.00%
0.125 Percent Convertible Senior Notes [Member] |  |  |  |
Call Spread [Abstract] |  |  |  |
Interest rate on convertible senior notes | 0.125% |  | 0.125% | 0.125%

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