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PROPERTY, PLANT AND EQUIPMENT (Tables)
9 Months Ended
Sep. 30, 2021
Property, Plant and Equipment [Abstract]  
Schedule of property, plant and equipment, net
The carrying value and estimated useful lives of property, plant and equipment are as follows:
(In thousands)Estimated Useful LifeSeptember 30, 2021December 31, 2020
Property, plant and equipment
Landn/a$4,466 $4,466 
Leasehold and building improvements(1)142,025 117,865 
Land improvements15 years4,894 4,864 
Buildings
30 - 40 years
201,040 200,980 
Computer equipment and computer software3 years99,889 75,417 
Laboratory equipment
3 - 10 years
175,393 142,110 
Furniture and fixtures
3 - 10 years
27,593 24,968 
Assets under constructionn/a64,187 18,854 
Property, plant and equipment, at cost719,487 589,524 
Accumulated depreciation(195,287)(137,538)
Property, plant and equipment, net$524,200 $451,986 
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(1)Lesser of remaining lease term, building life, or estimated useful life.