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Leases - Narrative (Details)
$ in Thousands
 1 Months Ended 12 Months Ended
Jul. 01, 2020
USD ($)
ft²
item
May 31, 2022
USD ($)
ft²
building
period
Dec. 31, 2023
USD ($)
lease
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Leases          
Operating lease, expense     $ 29,000 $ 25,200 $ 21,400
Finance Lease, Liability     20,184    
Finance lease liabilities- current     3,000 3,000  
Finance lease liabilities- noncurrent     17,184 18,675  
Aggregate rent, Initial term     252,586    
Operating lease ROU assets     91,896 102,430  
Operating Lease, Liability     110,629    
MassBio          
Leases          
Finance lease cost     1,500 1,600  
Finance lease liabilities- current     3,000 3,000  
Finance lease liabilities- noncurrent     $ 17,200 $ 18,700  
Minimum          
Leases          
Operating lease, term of contract     2 months 12 days    
Maximum          
Leases          
Operating lease, term of contract     15 years 4 months 24 days    
Renewal term     15 years    
Principal Office - NJ          
Leases          
Number of operating leases | lease     2    
Lessee, Operating Lease, Existence of Option to Terminate [true false]     false    
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