Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

v3.21.2
Subsequent Events (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Aug. 23, 2021
Aug. 01, 2021
Jun. 30, 2021
Jun. 30, 2021
Jun. 30, 2020
Subsequent Event [Line Items]          
Repayments of long-term debt       $ 900,000 $ 0
Performance Chemicals          
Subsequent Event [Line Items]          
Repayments of long-term debt     $ 526,363    
Subsequent Event          
Subsequent Event [Line Items]          
Cash dividend per share $ 3.20        
Subsequent Event | Performance Chemicals          
Subsequent Event [Line Items]          
Purchase price to sell Performance Chemicals   $ 1,100,000      
2016 Term Loan Facility | Subsequent Event          
Subsequent Event [Line Items]          
Repayments of long-term debt   231,363      
5.750% Senior Notes due 2025 | Subsequent Event          
Subsequent Event [Line Items]          
Repayments of Unsecured Debt   $ 295,000