XML 50 R38.htm IDEA: XBRL DOCUMENT v3.21.1
Fair Value of Financial Instruments - Fair value on a recurring basis (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Jun. 01, 2016
Mar. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Fair value of financial instruments      
Long term investments (Note 6)   $ 202,174 $ 222,301 [1]
ARIAD | Contingent Consideration      
Roll forward of Level 3 liabilities      
Projected cash flows period 18 years    
ARIAD | Discount rate | Contingent Consideration      
Roll forward of Level 3 liabilities      
Valuation input (as a percent) 0.10    
ARIAD | Average Cost of Capital | Contingent Consideration      
Roll forward of Level 3 liabilities      
Valuation input (as a percent)   0.10  
ARIAD | Accrued and other current liabilities      
Roll forward of Level 3 liabilities      
Contingent consideration earned during the period but not yet paid   $ (8,500) (9,600)
Level 3 | Fair Value      
Roll forward of Level 3 liabilities      
Balance at the beginning of the period   266,000  
Contingent consideration earned during the period but not yet paid   (8,526)  
Change in fair value of contingent consideration   5,526  
Balance at the end of the period   263,000 266,000
Recurring | Fair Value      
Fair value of financial instruments      
Cash and cash equivalents   1,669,968 1,513,008
Debt securities (government)   292,425 288,369
Long term investments (Note 6)   202,174 222,301
Total assets   2,164,567 2,023,678
Acquisition-related contingent consideration   263,000 266,000
Total liabilities   263,000 266,000
Recurring | Level 1      
Fair value of financial instruments      
Cash and cash equivalents   1,669,968 1,513,008
Long term investments (Note 6)   202,174 222,301
Total assets   1,872,142 1,735,309
Recurring | Level 2      
Fair value of financial instruments      
Debt securities (government)   292,425 288,369
Total assets   292,425 288,369
Recurring | Level 3      
Fair value of financial instruments      
Acquisition-related contingent consideration   263,000 266,000
Total liabilities   $ 263,000 $ 266,000
[1] The condensed consolidated balance sheet at December 31, 2020 has been derived from the audited consolidated financial statements at that date.