Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

v3.20.2
Subsequent Events (Details) - Subsequent Event - USD ($)
$ in Thousands
Oct. 15, 2020
Oct. 01, 2020
Subsequent Event [Line Items]    
Proceeds from agreement to sell Performance Materials business $ 650,000  
October 2013 New Markets Tax Credit Financing | Potters Industries, LLC    
Subsequent Event [Line Items]    
Notes Reduction   $ 21,000
October 2013 New Markets Tax Credit Financing | Potters Industries, LLC | Notes Payable II    
Subsequent Event [Line Items]    
Notes Reduction   15,632
October 2013 New Markets Tax Credit Financing | Potters Industries, LLC | Notes Payable to Banks    
Subsequent Event [Line Items]    
Notes Reduction   $ 5,368