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Leases - Narrative (Details)
$ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Jul. 01, 2020
USD ($)
ft²
item
May 31, 2022
USD ($)
ft²
period
building
Mar. 31, 2023
USD ($)
lease
Mar. 31, 2022
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2022
USD ($)
Jun. 19, 2020
USD ($)
Leases              
Number of operating leases | lease     2        
Operating lease, expense     $ 7,100 $ 5,300      
Finance Lease, Liability     19,041        
Finance lease liabilities- current     1,857     $ 3,000  
Finance lease liabilities- noncurrent     17,184     18,675  
Aggregate rent, Initial term     264,252        
Operating lease ROU assets     99,531     $ 102,430  
Operating Lease, Liability     110,040        
Research and development     195,124 140,078      
2024     18,465        
MassBio              
Leases              
Finance lease cost     400 $ 400      
Finance Lease, Liability             $ 41,400
Finance lease liabilities- current     1,800        
Finance lease liabilities- noncurrent     $ 17,200        
Finance lease ROU asset             $ 41,400
Finance lease, term of contract             12 years 6 months
Research and development         $ 41,400    
Minimum              
Leases              
Operating lease, term of contract     10 months 24 days        
Maximum              
Leases              
Operating lease, term of contract     16 years 2 months 12 days        
Renewal term     20 years        
Hopewell Campus              
Leases              
Operating lease, term of contract 15 years            
Area of real estate property | ft² 220,500            
Renewal term 10 years            
Number of renewable terms | item 2            
Lessee, Operating Lease, Existence of Option to Extend [true false] true            
Aggregate rent, Initial term $ 111,500            
Percent of market rate 95.00%            
Warren Premises              
Leases              
Operating lease, term of contract   17 years          
Number of buildings leased | building   2          
Area of real estate property | ft²   360,000          
Renewal term   5 years          
Number of renewable terms | period   3          
Lessee, Operating Lease, Existence of Option to Extend [true false]   true          
Aggregate rent, Initial term   $ 163,000          
Operating lease ROU assets   28,900          
Operating Lease, Liability   $ 28,900          
Base rent abatement period   3 years          
Base rent abatement   $ 18,600          
Aggregate rent net of base rate abatement, initial term   144,400          
Allowance for lease improvements   36,200          
Commitment to fund construction account   3,600          
Payment due from lessor at issuance of temporary certificate of occupancy   $ 5,000