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Supplemental Balance Sheet Information - Inventories (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Inventory, Net          
Raw materials $ 49,600,000   $ 49,600,000   $ 50,300,000
Work in process 24,200,000   24,200,000   19,800,000
Finished goods 86,200,000   86,200,000   88,500,000
Supplies and other 3,900,000   3,900,000   4,600,000
Total Inventory 163,900,000   163,900,000   $ 163,200,000
Inventory obsolescence $ 0 $ 2,400,000 $ 1,500,000 $ 3,400,000