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Property and Equipment, net - Buildings and construction (Details)
$ in Thousands
1 Months Ended 12 Months Ended
Jul. 31, 2018
USD ($)
Dec. 31, 2020
USD ($)
ft²
Dec. 31, 2019
USD ($)
Jun. 30, 2019
USD ($)
Feb. 28, 2018
ft²
Property and equipment, net          
Financing lease liabilities   $ 34,857      
Finance lease right-of-use assets, net   28,451 $ 29,058    
Costs for architectural and engineering studies and initial ground preparation   $ 703,999 $ 499,437    
Office Building in Wilmington, Delaware          
Property and equipment, net          
Square footage | ft²   200,000      
Capitalized construction costs   $ 79,500      
Office Building in Morges, Switzerland          
Property and equipment, net          
Initial lease term         15 years
Options to extend   true      
Renewal term of agreement to rent         20 years
Square footage | ft²         100,000
Financing lease liabilities       $ 31,100  
Finance lease right-of-use assets, net       29,100  
Finance Lease, Lease Incentive Receivable       $ 2,000  
Capitalized construction costs   $ 17,900      
Land in Y-PARC, Switzerland's largest technology park, Yverdon          
Property and equipment, net          
Capitalized construction costs   $ 167,400      
Purchase price $ 4,800