Quarterly report pursuant to Section 13 or 15(d)

Fair Value (Details)

v3.20.1
Fair Value (Details) - Derivatives designated as hedging instrument - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Derivative assets:    
Total derivative assets $ 10,604 $ 3,928
Derivative liabilities:    
Total derivative liabilities 5,217 12,415
Cash flow hedging    
Derivative liabilities:    
Total derivative liabilities 5,217 4,281
Cash flow hedging | Accrued liabilities | Natural gas swaps    
Derivative liabilities:    
Total derivative liabilities 995 813
Cash flow hedging | Accrued liabilities | Interest rate caps    
Derivative liabilities:    
Total derivative liabilities 1,073 420
Cash flow hedging | Other long-term liabilities | Natural gas swaps    
Derivative liabilities:    
Total derivative liabilities 386 226
Cash flow hedging | Other long-term liabilities | Interest rate caps    
Derivative liabilities:    
Total derivative liabilities 2,763 2,822
Cash flow hedging | Other long-term liabilities | Cross-currency interest rate swaps    
Derivative liabilities:    
Total derivative liabilities 0 8,134
Net investment hedging | Prepaid and other current assets | Cross-currency interest rate swaps    
Derivative assets:    
Total derivative assets 5,234 3,928
Net investment hedging | Other long-term assets | Cross-currency interest rate swaps    
Derivative assets:    
Total derivative assets $ 5,370 $ 0