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PROPERTY, PLANT AND EQUIPMENT
 9 Months Ended
Sep. 30, 2025
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT PROPERTY, PLANT AND EQUIPMENT
The carrying value and estimated useful lives of property, plant and equipment are as follows:
(In thousands)Estimated Useful LifeSeptember 30, 2025December 31, 2024
Property, plant and equipment
Landn/a$4,716 $4,716 
Leasehold and building improvements(1)243,879 227,885 
Land improvements15 years6,747 6,747 
Buildings
30 - 40 years
290,777 290,777 
Computer equipment and computer software3 years235,050 206,460 
Machinery and equipment
3 - 10 years
378,706 339,421 
Furniture and fixtures
3 - 10 years
36,381 37,176 
Assets under constructionn/a84,445 89,065 
Property, plant and equipment, at cost1,280,701 1,202,247 
Accumulated depreciation(576,636)(508,574)
Property, plant and equipment, net$704,065 $693,673 
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(1)Lesser of remaining lease term, building life, or estimated useful life.
Depreciation expense for the three months ended September 30, 2025 and 2024 was $31.7 million and $30.3 million, respectively. Depreciation expense for the nine months ended September 30, 2025 and 2024 was $92.8 million and $90.7 million, respectively.
At September 30, 2025, the Company had $84.4 million of assets under construction, which consisted of $35.1 million in machinery and equipment, $26.0 million in leasehold and building improvements, and $23.3 million in capitalized costs related to software projects. Depreciation will begin on these assets once they are placed into service upon completion.