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Supplemental Cash Flow Information - Non-Cash (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Nov. 15, 2019
Jun. 10, 2014
Non-cash investing activity:            
Property and equipment, accrued but unpaid   $ 150 $ 50 $ 3,154    
Right-of-use assets acquired in exchange for operating lease obligations   4,130,000 9,850 31,148    
Exchange of corporate debt securities $ 18,300 0 0 18,326    
Disposition of investment in Consensus   112,286 0 0    
Non-cash financing activity:            
Conversion shares issued as extinguishment cost to redeem 3.25% Convertible Notes   0 431,952 0    
Reacquisition of 3.25% Convertible Notes, net of tax   0 390,526 0    
Disposition of investment   160,100        
Aggregate purchase price   112,300        
Loss on sale on investments   (47,800)        
1.75% Convertible Notes            
Non-cash financing activity:            
Repayments of Debt   112,286 0 0    
1.75% Convertible Notes | Convertible Debt            
Non-cash financing activity:            
Stated interest rate         1.75%  
4.625% Senior Notes Due in 2030            
Non-cash financing activity:            
Repayments of Debt   $ 0 $ 485,000 $ 0    
3.25% Convertible Notes | Convertible Debt            
Non-cash financing activity:            
Stated interest rate           3.25%