Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments - Narratives (Details)

v3.10.0.1
Financial Instruments - Narratives (Details)
€ in Thousands, MMBTU in Millions
1 Months Ended 9 Months Ended
Jul. 31, 2016
USD ($)
Sep. 30, 2018
USD ($)
MMBTU
Nov. 13, 2018
USD ($)
Sep. 30, 2018
EUR (€)
Derivative        
Document Period End Date   Sep. 30, 2018    
Derivative, notional quantity (in MMBTU) | MMBTU   4.6    
Amount of derivative loss expected to be transferred from OCI   $ 294,000    
Interest rate caps        
Derivative        
Premium paid to acquire derivative instrument $ 1,551,000      
Derivative, cap interest rate   2.50%   2.50%
Derivative, notional amount $ 1,000,000,000      
Interest rate caps | Minimum        
Derivative        
Derivative, cap interest rate 1.50%      
Interest rate caps | Maximum        
Derivative        
Derivative, cap interest rate 3.00%      
Interest rate cap II | Subsequent Event        
Derivative        
Derivative, cap interest rate     3.50%  
Derivative, notional amount     $ 500,000,000  
Currency swap        
Derivative        
Derivative instrument   $ 324,940,000   € 280,000