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Property and Equipment, net - Property and equipment, net (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Property and equipment, net      
Property and Equipment, gross $ 899,640 $ 703,999  
Less accumulated depreciation and amortization (175,720) (144,374)  
Property and Equipment, net 723,920 559,625  
Depreciation expense including amortization expense of leasehold improvements 36,300 29,600 $ 32,100
Office equipment      
Property and equipment, net      
Property and Equipment, gross 22,554 17,880  
Laboratory equipment      
Property and equipment, net      
Property and Equipment, gross 105,040 86,021  
Computer equipment      
Property and equipment, net      
Property and Equipment, gross 79,871 66,640  
Land      
Property and equipment, net      
Property and Equipment, gross 10,494 10,671  
Building and leasehold improvements      
Property and equipment, net      
Property and Equipment, gross 434,321 238,042  
Operating lease right-of-use assets      
Property and equipment, net      
Property and Equipment, gross 27,308 26,816  
Construction in Progress      
Property and equipment, net      
Property and Equipment, gross $ 220,052 $ 257,929