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Long-Term Obligations and Commitments, Long-Term Obligations (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Nov. 30, 2021 | Apr. 30, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2016 | Nov. 30, 2014
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Long-Term Obligations [Abstract] |  |  |  |  |  |  |  |
Long-term mortgage debt | $ 59,713 |  |  | $ 59,984 |  |  |  |
Leases and other obligations | 29,904 |  |  | 30,710 |  |  |  |
Total | 1,251,050 |  |  | 939,639 |  |  |  |
Less: current portion | (3,526) |  |  | (316,110) | [1] |  |  |
Total Long-Term Obligations | 1,247,524 |  |  | 623,529 |  |  |  |
0.125 Percent Convertible Senior Notes [Member] |  |  |  |  |  |  |  |
Long-Term Obligations [Abstract] |  |  |  |  |  |  |  |
Convertible senior notes | $ 542,314 |  |  | $ 540,136 |  |  |  |
Interest rate on convertible senior notes | 0.125% |  |  | 0.125% |  | 0.125% |  |
1 Percent Convertible Senior Notes [Member] |  |  |  |  |  |  |  |
Long-Term Obligations [Abstract] |  |  |  |  |  |  |  |
Convertible senior notes | $ 0 |  |  | $ 308,809 | [1] |  |  |
Interest rate on convertible senior notes | 1.00% | 1.00% | 1.00% | 1.00% |  | 1.00% | 1.00% | 1.00%
0 Percent Convertible Senior Notes [Member] |  |  |  |  |  |  |  |
Long-Term Obligations [Abstract] |  |  |  |  |  |  |  |
Convertible senior notes | $ 619,119 |  |  | $ 0 |  |  |  |
Interest rate on convertible senior notes | 0.00% |  | 0.00% |  |  | 0.00% |  |
[1] | We classified the carrying value of our 1% Notes as a current liability on our consolidated balance sheet at December 31, 2020 because it matured in November 2021.

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