Quarterly report pursuant to Section 13 or 15(d)

Long-term Debt - Narratives (Details)

v3.10.0.1
Long-term Debt - Narratives (Details)
€ in Thousands
3 Months Ended 9 Months Ended
Feb. 08, 2018
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2018
EUR (€)
Dec. 31, 2017
USD ($)
Debt Instrument          
Long-term debt, fair value difference from carrying value   $ 26,578,000 $ 26,578,000   $ 59,319,000
Currency swap          
Debt Instrument          
Derivative instrument   324,940,000 324,940,000 € 280,000  
Term Loan | New Term Loan Facility          
Debt Instrument          
Debt instrument face amount $ 1,267,000,000        
Scheduled repayment percentage 0.25%        
Debt extinguishment costs, write-off of deferred financing costs   258,000 258,000    
Debt extinguishment costs, write-off of debt discounts   606,000 606,000    
Repayments of notes   $ 45,000,000      
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