Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment (Details)

v3.20.4
Property, Plant and Equipment (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]    
Less accumulated depreciation and amortization $ (336,700,000) $ (318,400,000)
Total 246,900,000 277,200,000
Depreciation 40,800,000 43,700,000
Land    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 10,600,000 28,200,000
Buildings    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 81,800,000 88,300,000
Machinery and equipment    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 458,900,000 444,600,000
Computer software    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 15,900,000 15,300,000
Construction in progress    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 16,400,000 $ 19,200,000