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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
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.