Annual report pursuant to Section 13 and 15(d)

Financial Instruments - Fair Value (Details)

v3.19.3.a.u2
Financial Instruments - Fair Value (Details) - Derivatives designated as cash flow hedges: - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Derivative assets:    
Total derivative assets $ 3,928 $ 20,768
Liability derivatives:    
Total derivative liabilities 12,415 2,026
Cash flow hedging    
Derivative assets:    
Total derivative assets 0 1,925
Liability derivatives:    
Total derivative liabilities 4,281 2,026
Cash flow hedging | Prepaid expenses and other current assets | Natural gas swaps    
Derivative assets:    
Total derivative assets 0 21
Cash flow hedging | Prepaid expenses and other current assets | Interest rate caps    
Derivative assets:    
Total derivative assets 0 1,358
Cash flow hedging | Other long-term assets | Interest rate caps    
Derivative assets:    
Total derivative assets 0 546
Cash flow hedging | Accrued liabilities | Natural gas swaps    
Liability derivatives:    
Total derivative liabilities 813 36
Cash flow hedging | Accrued liabilities | Interest rate caps    
Liability derivatives:    
Total derivative liabilities 420 0
Cash flow hedging | Other long-term liabilities | Natural gas swaps    
Liability derivatives:    
Total derivative liabilities 226 148
Cash flow hedging | Other long-term liabilities | Interest rate caps    
Liability derivatives:    
Total derivative liabilities 2,822 1,842
Cash flow hedging | Other long-term liabilities | Cross currency swaps    
Liability derivatives:    
Total derivative liabilities 8,134 0
Net investment hedging    
Derivative assets:    
Total derivative assets 3,928 18,843
Net investment hedging | Prepaid expenses and other current assets | Cross currency swaps    
Derivative assets:    
Total derivative assets 3,928 5,499
Net investment hedging | Other long-term assets | Cross currency swaps    
Derivative assets:    
Total derivative assets $ 0 $ 13,344