Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments - Narratives (Details)

v3.19.3
Financial Instruments - Narratives (Details)
€ in Thousands, $ in Thousands, MMBTU in Millions
1 Months Ended 9 Months Ended
Jul. 31, 2016
USD ($)
Sep. 30, 2019
USD ($)
MMBTU
Nov. 30, 2018
USD ($)
Feb. 28, 2018
EUR (€)
Cash flow hedging        
Derivative        
Amount of derivative loss expected to be transferred from OCI   $ 1,431    
Cash flow hedging | Natural gas swaps        
Derivative        
Derivative, notional quantity | MMBTU   3.3    
Cash flow hedging | July 2016 interest rate caps        
Derivative        
Premium paid to acquire derivative instrument $ 1,551      
Derivative, cap interest rate   3.00%    
Derivative, notional amount $ 1,000,000      
Cash flow hedging | July 2016 interest rate caps | Minimum        
Derivative        
Derivative, cap interest rate 1.50%      
Cash flow hedging | July 2016 interest rate caps | Maximum        
Derivative        
Derivative, cap interest rate 3.00%      
Cash flow hedging | November 2018 interest rate caps        
Derivative        
Derivative, cap interest rate     3.50%  
Derivative, notional amount     $ 500,000  
Net investment hedging | Cross-currency interest rate swaps        
Derivative        
Derivative, notional amount   $ 306,345   € 280,000