Annual report pursuant to Section 13 and 15(d)

Financial Instruments - Narratives (Details)

v3.19.3.a.u2
Financial Instruments - Narratives (Details)
€ in Thousands, $ in Thousands, MMBTU in Millions
1 Months Ended 12 Months Ended
Oct. 31, 2019
USD ($)
Jul. 31, 2016
USD ($)
Dec. 31, 2019
USD ($)
MMBTU
Oct. 01, 2019
EUR (€)
Nov. 13, 2018
USD ($)
Feb. 28, 2018
EUR (€)
Derivative [Line Items]            
Amount of derivative loss expected to be transfered from OCI     $ 1,442      
Cross currency swaps            
Derivative [Line Items]            
Cash proceeds on cross currency swap $ 38,070          
Cash flow hedging | Natural gas swaps            
Derivative [Line Items]            
Derivative, notional quantity (in MMBTU) | MMBTU     3.6      
Cash flow hedging | July 2016 Interest Rate Cap [Member]            
Derivative [Line Items]            
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 Cap [Member] | Minimum            
Derivative [Line Items]            
Derivative, cap interest rate   1.50%        
Cash flow hedging | July 2016 Interest Rate Cap [Member] | Maximum            
Derivative [Line Items]            
Derivative, cap interest rate   3.00%        
Cash flow hedging | November 2018 Interest Rate Cap [Member]            
Derivative [Line Items]            
Derivative, cap interest rate         3.50%  
Derivative, notional amount         $ 500,000  
Discontinued cash flow hedging | July 2016 Interest Rate Cap [Member]            
Derivative [Line Items]            
Derivative, notional amount     $ 53,000      
Net investment hedging | Cross currency swaps            
Derivative [Line Items]            
Derivative, notional amount     $ 313,656 € 280,000   € 280,000