Quarterly report pursuant to Section 13 or 15(d)

Long-term Debt - Narratives (Details)

v3.8.0.1
Long-term Debt - Narratives (Details)
€ in Thousands
3 Months Ended
Feb. 08, 2018
USD ($)
Mar. 31, 2018
USD ($)
Mar. 31, 2018
EUR (€)
Dec. 31, 2017
USD ($)
Debt Instrument        
Long-term debt, fair value difference from carrying value   $ 32,972,000   $ 59,319,000
Currency swap        
Debt Instrument        
Derivative instrument   345,041,000 € 280,000  
Term Loan | New Term Loan Facility        
Debt Instrument        
Debt instrument face amount $ 1,267,000,000      
Scheduled repayment percentage 0.25%      
Call premium 1.00%      
Term Loan | New Term Loan Facility | LIBOR        
Debt Instrument        
Variable rate on spread 2.50%      
Term Loan | Term Loan Facility        
Debt Instrument        
Debt extinguishment costs, financing costs   2,124,000    
Debt extinguishment costs, write-off of deferred financing costs   1,403,000    
Debt extinguishment costs, write-off of debt discounts   $ 2,352,000