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Property, Plant and Equipment and Inventory
 3 Months Ended
Mar. 31, 2024
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment and Inventory Property, Plant and Equipment and Inventory
Property, plant and equipment
Property, plant and equipment is comprised of the following at March 31, 2024 and December 31, 2023 (in thousands):
March 31, 2024December 31, 2023
Machinery and equipment$241,161 $238,168 
Furniture, fixtures and other70,492 67,652 
Leasehold improvements97,212 95,530 
Buildings and land12,812 12,816 
Construction in process15,525 15,197 
437,202 429,363 
Less: accumulated depreciation(245,333)(236,801)
Total$191,869 $192,562 
Depreciation expense was $10.9 million for the three months ended March 31, 2024 and $11.2 million for the three months ended March 31, 2023.
Inventory
Inventory is comprised of the following at March 31, 2024 and December 31, 2023 (in thousands):
March 31, 2024December 31, 2023
Raw materials $87,499 $97,209 
Work-in-process39,306 25,516 
Finished goods690,033 646,406 
Less: obsolescence reserve(28,029)(28,744)
Total$788,809 $740,387